JP2014048850A - Control method of duplexing input signal control device and duplexing output signal control device, duplexing input signal control device thereof and duplexing output signal control device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control method of a duplexing input signal control device and a duplexing output signal control device capable of reducing the size of the device by commonly using a program and capable of performing self-diagnosis any time.SOLUTION: The duplexing input signal control device and the duplexing output signal control device include: a first input/output signal control section 10 and a second input/output signal control section 20 which have the same configuration for setting a self-control mode on the basis of a control mode of two systems; an input section 50; an inter-CPU communication circuit 40; and a transmission circuit 30. One of the first input/output signal control sections includes: a switch 14; a first CPU 12; a control mode storage 13; and a program storage 11. The control method of the duplexing input signal control device and the duplexing output signal control device includes the steps of: comparing the control modes to each other; and responding an input signal when the control modes coincide with each other, responding an inconsistent signal when the control modes are inconsistent with each other, and stopping the execution upon receiving a stop instruction. By sequentially performing comparison the control mode, the reliability of the input signal is increased.

Description

  Embodiments described herein relate generally to a duplexed input signal control apparatus and a duplexed output signal control apparatus control method, a duplexed input signal control apparatus, and a duplexed output signal control apparatus.

  In recent years, as an international standard, functional safety standards for equipment manufacturers / suppliers are defined as IEC 61508 “Functional safety of electrical / electronic / programmable electronic safety-related systems” of the International Electrotechnical Commission. Furthermore, in a specific industrial functional safety system, a derived standard is defined for a specific application.

  For example, in process automation, IEC 61511 defines requirements for safety instrumented system designers to determine specifications, design, installation, operation and maintenance of safety instrumented systems.

  In these standards, safety in the life cycle from system design, maintenance, and disposal is evaluated, and the safety integrity level (SIL, Safety Integrity Level), which is the required level of risk reduction, is used as a quantitative evaluation measure in accordance with IEC 61511-. It is stipulated in 3.

  Against this background, especially in safety instrumented systems that require a high level of safety, in order to avoid malfunctions due to failures of the devices that make up the system, self-diagnosis of each part of the device is performed and a failure is found. Is trying to stop the entire system safely.

  In a safety instrumented system, a host device for controlling the system (generally called a control device) and its input / output device (generally called an I / O device), but here, a digital input device and an analog The input device is hereinafter referred to as an input signal control device, a digital input device, and an analog input device are hereinafter referred to as an output signal control device.) Based on functional safety requirements, the diagnostic rate is improved by self-diagnosis. Redundancy by duplication / triple etc. is performed to improve the safety level.

  In a signal security device normally used in a duplex system, in order to improve the operating rate, it is used for an ATC that detects an abnormality by constantly monitoring the contact of a switch element used for selection of an input / output channel. There is a signal security device (see Patent Document 1).

JP 2010-221840 A

  Generally, when the input signal control device and the output signal control device used in the safety instrumentation system are made redundant, if the configuration is simply duplicated, a large number of diagnostic programs are used for self-diagnosis of each part constituting the device. Since it is necessary to provide a control program including the program, there is a problem that the storage capacity of the program becomes large.

  Therefore, when the input signal control device and the output signal control device are used in duplicate, the program such as self-diagnosis of components is made common, and the storage unit is made compact by sharing the program storage unit. It is possible to do.

  However, in the case of duplication, since it is necessary to set in advance whether the device is an input signal control device or an output signal control device, a switching function is required, so there is a problem that self-diagnosis of this switching function is always required To do.

  However, in the case of the signal security device of Patent Document 1 described above, the value of the switch element that periodically sets the input / output channels is stored in the nonvolatile memory, and the value of the switch element is compared with the value of the nonvolatile memory. Although it is possible to detect an abnormality of the switch element, it is not known to share a control program such as self-diagnosis in the case of duplication and to switch between different functions of input and output.

  The present invention has been made to solve the above-described problems. The present invention has been made to reduce the size of the apparatus by sharing a program used by the duplexed input signal control apparatus and the duplexed output signal control apparatus, and the duplexed apparatus. It is an object of the present invention to provide a duplexed input signal control device and a duplexed output signal control device control method capable of diagnosis at all times, a duplexed input signal control device, and a duplexed output signal control device.

  In order to achieve the above object, the control method of the duplexed input signal control device and the duplexed output signal control device of the present embodiment determines whether the two systems are in the control mode of input signal control or output signal control. Based on the control mode set in advance, the first input / output signal controller of one system and the second input / output signal controller of the other system that set its own control mode, based on the control mode, An input unit including two input circuits corresponding to two systems selected by the first input / output signal control unit and the second input / output signal control unit, or an output unit, and the first input / output signal control unit In response to transmission information from an external host device, an inter-CPU communication circuit unit that mutually transmits and receives the control mode set in the input / output signal control unit and the second input / output signal control unit, the input Before input from the department Input signals from two systems of input circuits are sent back to the host device, or output signals to the two systems of output circuits instructed by the host device in response to transmission information from the host device A transmission circuit unit for transmitting to the output unit, and a control method for the dual output signal control device, wherein the first input / output signal control unit includes a switch for setting the control mode; Transmitting the transmission information from the host device sent via the transmission circuit to the other system and receiving input signals of the input circuits of the two systems and sending them to the transmission circuit unit, or A first CPU that receives an instruction value of an output signal of the output circuit of the two systems and sets it in the output unit; a control mode storage unit that stores the control mode set by the switch; A program storage unit that selects the control mode stored in the control mode recording unit executed by the first CPU, stores a common program and two unique programs corresponding to the control mode, and the second The input / output signal control unit receives the input signal from the switch for setting the control mode and the input circuit of the other system and sends it to the first CPU via the inter-CPU communication circuit unit. Alternatively, the second CPU that receives the instruction values of the output signals of the two systems transmitted from the first CPU to the second CPU via the inter-CPU communication circuit unit, and sets the output values in the output unit. A control mode storage unit that stores the control mode set by the switch; and the control mode stored in the control mode recording unit that is executed by the second CPU; And a program storage unit that stores the two unique programs corresponding to the control mode, and the first CPU and the second CPU are stored in the respective control mode storage units. The step of comparing the control modes with each other, and when the control mode is coincident with “input signal control”, select the control mode, select the specific program corresponding to the common program When the input mode of the two systems is returned to the host device and the control mode matches with “output signal control”, the control mode is selected, and the unique program corresponding to the common program is selected. Selecting a program and setting the output signals of the two systems to the output unit, and if not, returns a mismatch to the higher-level device And stopping the execution of the specific program, and sequentially comparing two preset control modes to improve the reliability of the input signals or output signals of the two systems. It is characterized by that.

  In order to achieve the above object, the duplexed input signal control device according to the present embodiment determines whether the two systems are in the input signal control mode or the output signal control mode based on a preset control mode. A first input / output signal controller of one system for setting its own control mode, a second input / output signal controller of the other system, and the first input / output signal controller based on the control mode And an input unit including two input circuits corresponding to two systems selected by each of the second input / output signal control units, the first input / output signal control unit, and the second input / output signal control Input / output signals from the two systems of input circuits input from the input unit in response to transmission information from the host device, and an inter-CPU communication circuit unit that mutually transmits and receives the control mode set in the unit To the higher-level device A duplex input signal control device comprising: a transmission circuit unit, wherein the first input / output signal control unit includes a switch for setting the control mode and the higher-level device transmitted via the transmission circuit unit. A first CPU that transmits the transmission information to the other system, receives input signals of the input circuits of the two systems and sends them to the transmission circuit unit, and the control mode set by the switch. The control mode storage unit to be stored and the control mode stored in the control mode recording unit to be executed by the first CPU are selected, and a common program and two unique programs corresponding to the control mode are stored The program storage unit and the input / output signal control unit of the second system receive the input signal from the switch that sets the control mode and the input circuit of the other system, and A second CPU sent to the first CPU via the inter-PU communication circuit unit, a control mode storage unit for storing the control mode set by the switch, and the control mode executed by the second CPU A program storage unit for selecting the control mode stored in the recording unit and storing the common program and the two unique programs corresponding to the control mode; and the first CPU and the second The CPUs compare the control modes stored in the respective control mode storage units with each other, and when the control modes match with the “input signal control”, select the control mode and select the common control mode. A program and the corresponding unique program are selected, and the input signals of two systems are returned to the host device, and if they do not match, the host device indicates that they do not match The duplexing is characterized in that the execution of the specific program is stopped, the control modes of the two systems set in advance are sequentially compared, and the reliability of the input signals of the two systems is improved. Input signal control device.

  In order to achieve the above object, the duplexed output signal control device according to the present embodiment determines whether the two systems are in the input signal control mode or the output signal control mode based on a preset control mode. A first input / output signal controller of one system for setting its own control mode, a second input / output signal controller of the other system, and the first input / output signal controller based on the control mode And an output unit including two output circuits corresponding to two systems selected by each of the second input / output signal control units, the first input / output signal control unit, and the second input / output signal control Output signals to the two systems of output circuits instructed by the host device in response to transmission information from the host device in response to transmission information from the host device. Is sent to the output unit A duplex input signal control device comprising: a transmission circuit unit, wherein the first input / output signal control unit includes a switch for setting the control mode and the host device transmitted via the transmission circuit unit. The transmission information to the other system, the first CPU that receives the instruction value of the output signal of the output circuit of the two systems and sets the output unit, and the set by the switch A control mode storage unit that stores a control mode; and the control mode stored in the control mode recording unit that is executed by the first CPU is selected, a common program, and two unique programs corresponding to the control mode, The second system input / output signal control unit, the switch for setting the control mode, and the first CPU through the inter-CPU communication circuit unit. A second CPU that receives the instruction values of the output signals of the two systems transmitted to the second CPU and sets them in the output unit, and a control mode storage that stores the control mode set by the switch And a program storage unit that selects the control mode stored in the control mode recording unit executed by the second CPU and stores the common program and the two unique programs corresponding to the control mode The first CPU and the second CPU are compared with each other in the control mode stored in the respective control mode storage unit, and the control mode is coincident with “output signal control”. If the control mode is selected, the common program and the specific program corresponding to the common program are selected, and the output signals of two systems are returned to the output unit. Returns a mismatch to the host device, stops the execution of the unique program, and sequentially compares the control modes of the two systems set in advance to improve the reliability of the output signals of the two systems It was made to let it be made to do.

The block block diagram of the duplexed input signal control apparatus of 1st Embodiment. The block block diagram of the duplex output signal control apparatus of 1st Embodiment. The program block diagram memorize | stored in a program memory | storage part. The flowchart explaining operation | movement of 1st CPU of 1st Embodiment. The flowchart explaining the control mode selection processing operation of a 1st CPU. The program block diagram of a duplexed input signal control apparatus. The program block diagram of a duplication output signal control device. The flowchart explaining the other operation example of 1st CPU. The block block diagram of the duplication input signal control apparatus of 2nd Embodiment. The flowchart explaining operation | movement of 2nd CPU.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
The configuration of the apparatus will be described with reference to FIGS. FIG. 1 is a block diagram illustrating the configuration of the duplexed input signal control device according to the first embodiment, and FIG. 2 is a block diagram of the duplexed output signal control device.

  In FIG. 1, the duplexed input signal control apparatus 100 of the first embodiment has a control mode in which whether the two systems are in “input signal control” or “output signal control” is set in advance. The first input / output signal control unit 10 of one system, the second input / output signal control unit 20 of the other system, and the first input mode based on the control mode. Each of the output signal control unit 10 and the second input / output signal control unit 20 includes an input unit 50 including two input circuits corresponding to the two selected systems.

  The first input / output signal control unit 10 and the second input / output signal control unit 20 have the same configuration, and whether the control function is input signal control or output signal control is selected according to a preset control mode. The

  In addition, the inter-CPU communication circuit unit 40 that transmits and receives the control modes set in the first input / output signal control unit 10 and the second input / output signal control unit 20 to each other, and responds to transmission information from the host device 300. The input circuit 50 includes two systems of input circuits 51 and a transmission circuit unit 30 that returns input signals from the input circuit 52 to the host device 300.

  Next, the configuration of each unit will be described. The first input / output signal control unit 10 transmits transmission information from the upper device 300 sent via the switch (SW) 14 for setting the control mode and the transmission circuit unit 30 to the other system, and 2 And a first CPU 12 that receives input signals of the input circuit 51 of the own system of one system and the input circuit 52 of the other system and sends the input signals to the transmission circuit unit 30.

  Further, the control mode storage unit 13 for storing the control mode set by the switch 14 and the control mode stored in the control mode recording unit 13 executed by the first CPU 12 are selected, the common program 11a, and the control mode are selected. And a program storage unit 11 for storing two unique programs 11b corresponding to.

  Further, the second input / output signal control unit 20 has the same configuration as the first input / output signal control unit, receives the input signal from the switch (SW) 14 for setting the control mode and the input circuit 52 and receives the CPU. A second CPU 22 to be sent to the first CPU 12 via the inter-communication circuit unit 40, a control mode storage unit 23 for storing the control mode set by the switch 14, and a control mode recording unit to be executed by the second CPU 22 13 includes a program storage unit 11 that selects the control mode stored in 13 and stores a common program 11a and two unique programs 11b corresponding to the control mode.

  Next, the detailed configuration of each unit will be described. As described above, since the first input / output signal control unit 10 and the second input / output signal control unit 20 have the same configuration, the detailed configuration of the first input / output signal control unit 10 will be described and the same. Portions are denoted by the same reference numerals and description thereof is omitted.

  The switch 14 may be a small element having two or more inputs such as a dip switch and having high contact reliability.

  The program storage unit 11 stores a program executed by the first CPU 1, and a read-only nonvolatile semiconductor memory (ROM) having a storage capacity equal to or greater than a preset program capacity can be used.

  The control mode recording unit 13 stores a preset control mode, and a volatile memory (RAM) capable of reading and writing with a small storage capacity can be used.

  The input circuit 51 and the input circuit 52 including two systems of circuits may be analog inputs or digital inputs. However, in the case of an analog input (not shown), an output of a logic signal level digitized with a predetermined resolution is provided. Can be used, and the score is selected in advance by the system.

  Next, the program configuration of the program storage unit 11 will be described with reference to FIG. The configurations of programs executed by the first CPU 10 and the second CPU 20 are compared with each other by comparing the control modes stored in the respective control mode storage units 13, and the matched control mode is “input signal control”. A control mode selection / execution control program 111a, a higher-level communication program 111b for transmitting / receiving transmission information, a first input / output signal control unit 10 and a first input / output signal. A duplex input signal control device 100 or a duplex output signal control device 200 having a self-diagnosis program 111c for each part of the control unit 10 and an inter-CPU communication program 111d between the first CPU 12 and the second CPU 22. A common program 111 used in common is provided.

  Further, the input signal control specific program 112a corresponding to the control mode of “input signal control” used in the case of the duplex input signal control device 100 and the “output signal control” used in the case of the duplex output signal control device 200. And a unique program 112 comprising an output signal control unique program 112b corresponding to the control mode.

  Next, the configuration of the duplex output signal control apparatus 200 will be described with reference to FIG.

  2 that are the same as those of the duplexed input signal control apparatus 100 shown in FIG. 1 are assigned the same reference numerals, and descriptions thereof are omitted. The configuration of the duplexed output signal control device 200 shown in FIG. 2 is different from the duplexed input signal control device 100 shown in FIG. 1 in that the input unit 50 of the duplexed input signal control device 100 is the duplexed output signal control device 200. Is replaced by the output unit 60.

  In this case, the output unit 60 includes two output circuits 61 and an output circuit 62. The output may be an analog output or a digital output. However, in the case of an analog output, any output can be used as long as it can generate an output of a logic signal level digitized with a predetermined resolution. The

  Further, the programs executed by the first CPU 12 and the second CPU 22 are different execution programs depending on the control mode stored in the control mode storage unit 13.

  Here, when the control mode is “input signal control”, the configuration of programs executed by the first CPU 12 and the second CPU will be described.

  As shown in FIG. 6, when this control mode is “input signal control”, transmission information reception for transmitting / receiving transmission information between the control mode selection / execution control program 111 a for controlling execution of the program and the higher-level device 300 is performed. A host communication program 111b composed of an upper device abnormality detection unit that detects an abnormality signal transmitted from the transmission unit, transmission information transmission unit, and host device 300, control mode storage unit (RAM) diagnosis, program storage unit (ROM) diagnosis, It comprises a self-diagnosis program 111c composed of its own CPU diagnosis, and an inter-CPU communication circuit unit diagnosis, and an inter-CPU communication program 111d.

  Furthermore, an input signal reading unit that reads an input signal from the input unit 50, an input signal generation unit that converts the read input signal into a digital signal, and the generated two systems of signals are compared and matched. An input signal control specific program 112a including a transmission information generation unit for determining whether or not.

  Next, when the control mode is “input signal control”, the configuration of the program executed by the first CPU 12 and the second CPU is, as shown in FIG. 7, the program when this control mode is “output signal control”. Control mode selection / execution control program 111a for controlling execution of the transmission information, transmission information receiving unit for transmitting / receiving transmission information with the higher level device 300, transmission information transmitting unit, and upper device for detecting an abnormal signal transmitted from the higher level device 300 A host communication program 111b comprising an abnormality detection unit, a self-diagnosis program 111c comprising a control mode storage unit (RAM) diagnosis, a program storage unit (ROM) diagnosis, its own CPU diagnosis, and an inter-CPU communication circuit unit diagnosis And an inter-CPU communication program 111d.

  Further, a transmission information generation unit that receives an output value transmitted from the host device 300, an output signal generation unit that generates an output signal from the received transmission information, and the generated output signal are set in each of the two output units 60. And an output signal control specific program 112b including an output signal output unit.

  Next, operations of the duplexed input signal control device 100 and the duplexed output signal control device 200 configured as described above will be described with reference to FIGS. 4 and 5.

  First, in FIG. 4, the first CPU 11 transmits transmission information from the host device 300 to the duplex signal input control device 100 or the duplex signal output control device 200 via the transmission circuit unit 30.

  Then, the first CPU 11 acquires this transmission information (s100), transmits it to the second CPU 22 via the inter-CPU communication circuit section 40 (s101), and activates the control mode selection / execution control program. (s102).

  Here, the transmission information sent from the host device 300 is information for transmitting / receiving an input signal or an output signal, for example, a transmission source address, a transmission destination address, an operation command for instructing start / stop of operation, and an output signal. Data, transmission checksums and time stamps of these data, and their own healthy signals.

  In addition, the transmission information transmitted from the duplex input signal control apparatus 100 or the duplex output signal control apparatus 200 to the host apparatus 300 is the case of the duplex input signal control apparatus 100 in addition to the information corresponding to the transmission information from the host apparatus 300. The data includes two systems of data from the input unit 50.

  Next, details of the operation (s102) of the control mode selection / execution control program 111a will be described with reference to FIG.

  First, the first CPU 12 exchanges the control modes stored in the respective control mode recording units 13 with the second CPU 22 (s200).

  The reason for exchanging this control mode is to prevent erroneous setting of the control mode due to the failure of the two redundant switches 14 and the soft error of the control mode storage unit 13 for storing the control mode set by this switch. It is in.

  Then, the first CPU 12 collates this control mode (s201), confirms that the control mode of both systems is “input signal control” or “output signal control”, and sets this control mode. A reply is sent to the host device 200 (s202, s203).

  When the control modes of the two systems are both “input signal control”, “input signal control” is selected, and when both are “output signal control”, “output signal control” is set to host device 200. Reply to

  If they do not match, “not determined” is returned (s204).

  In the case of “input signal control”, the first CPU 12 and the second CPU 22 set their own execution programs as shown in FIG. 6 and start the common program 111 and the input signal control specific program 112a. .

  Similarly, in the case of “output signal control”, the first CPU 12 and the second CPU 22 set their execution programs as shown in FIG. 7 and start the common program 111 and the output signal control specific program 112b. To do.

  Returning to FIG. 4 again, processing operations after the control mode selection processing (s102) will be described.

  When “output signal control” is selected as a result of the control mode selection process, the first CPU 12 receives an operation start command from the host device 300 (not shown) and executes the output signal control specific program 112b. That is, an output signal is generated based on the output value requested from the host device 300 (s103), and the output circuit 61 of one system from the first CPU 12 and the output circuit of the other system from the second CPU 22 are generated. The value is set in 62 (s104), and a response to the command is returned to the host device 300 (s109).

  When “input signal control” is selected as a result of the control mode selection process, the first CPU 12 receives an operation start command from the host device 300 (not shown) and executes the output signal control specific program 112a. That is, two systems of input signals are read from the first CPU 12 and the second CPU 22 based on an input request command from the host device 300, and further, this value is generated as information sent to the host device 300 ( s105).

  Then, the first CPU 12 compares the value read from the input circuit 51 with the value read from the input circuit 52 of the second CPU 22 (s107). Each value is returned as a response to (S109).

  Then, each of the first CPU 12 and the second CPU 22 activates the self-diagnosis program 111c to execute self-diagnosis of each unit (s111).

  As a result of the control mode selection process, if the control modes do not match, “not determined” is transmitted to the host device 300 (s106), the output from itself is set to “off” (s108), and the process is stopped ( s110).

  As shown in FIG. 8, it is determined whether or not there is an instruction to stop processing in the transmission information from the host device 300 (s100a). If so, the processing is stopped (s100b). You can also

  As described above, according to the first embodiment, the first CPU and the second CPU execute the control mode selection / execution control program in response to the transmission information of the host device, and execute the common program. In addition, a unique program corresponding to the control mode is extracted and the process is executed, and the first input / output signal control unit and the second input / output signal control unit are made common to the common program and the unique corresponding to the control mode. Since the program is provided, the program corresponding to the two control modes can be shared, and the storage capacity of the program storage unit can be made compact.

  In addition, the first CPU and the second CPU compare the control modes stored in the respective control mode storage units with each other, and when the two control modes coincide with each other in the “input signal control”, the control is performed. A mode is selected, a common program and a corresponding unique program are selected, and two systems of input signals are returned to the host device.

  In addition, the first CPU and the second CPU are compared with each other in the control mode stored in each of the control mode storage units, and when the two control modes coincide with each other in the “output signal control”, The control mode is selected, the common program and the corresponding unique program are selected, and the output signals of the two systems are set in the output unit.

If the mutual control modes do not match, the fact that they do not match is returned to the host device, and the execution of the selected unique program is stopped.

  That is, a duplexed input signal control device, a duplexed output signal control device, which sequentially compares the control modes of two systems set in advance to improve the reliability of the input signals and output signals of the two systems, and The control method can be provided.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. 9 and FIG. About each part of 2nd Embodiment, the part same as 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits the description.

  The second embodiment is different from the first embodiment in that, in the first embodiment, the setting of the control mode is set by the switches 14 of the two systems, and the value of this switch is stored in each control mode storage unit. 13 and every time there is a request from the host, the control mode storage unit 13 of the two systems is read and sequentially compared to confirm that they match and to start control. However, in the second embodiment, the control mode is set not by the two systems of switches 14 but by the host device 300 having the control mode storage unit 200a and transmitting the control mode from the host device 300 provided outside. In addition, it is configured to be stored in the control mode storage unit 13 of the two systems.

  In this case, as shown in FIG. 10, the control mode selection processing of the first CPU 12 or the second CPU 22 is stored in the control mode transmitted from the host device 300 and the control mode storage unit 13 of the two systems. If the control mode transmitted from the higher-level device 300 and one of the two control mode storage units 13 coincide with each other, the operation in the matched control mode is performed. To start.

  As a result of the control mode comparison / collation (s501), when the host device 300 is “input signal control” and one of the two systems is “input signal control”, the first CPU 12 and the second CPU 22 are different. In this case, the control mode is reset as “input signal control” (s504), and the fact that there is a difference is returned to the host apparatus 300 (s505).

  Similarly, when the higher-level device 300 is “output signal control” and one of the two systems is “output signal control” as a result of the control mode comparison and collation (s501), the first CPU 12 and the second CPU 22 If there is a difference, the control mode is reset by “output signal control” (s506), and the fact that there is a difference is returned to the host device 300 (s507).

  If the control mode of the host device 300 is different from the control mode stored in the control mode storage unit 13 of the two systems, “determination impossible” is returned to the host device (s508).

  According to such a configuration, the operation can be started when one of the two systems of the duplexed input control device and the duplexed output control device fails, so that the system can be made redundant.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

100 Duplex input signal control device 200 Duplex output signal control device 300 Host device 400 Digital input 500 Analog output (motor load)
10 First Input / Output Control Unit 11 Program Storage Unit 11a Shared Program 11b Unique Program 12 First CPU
13 Control Mode Storage Unit 14 Switch (SW)
20 Second input / output control unit 30 Transmission circuit unit 40 Inter-CPU communication circuit unit 50 Input unit 51, 52 Input circuit 60 Output unit 61, 62 Output circuit

Claims (8)

The first input / output signal control unit of one system that sets its own control mode based on a preset control mode, which of the two systems is the control mode of input signal control or output signal control And a second input / output signal controller of the other system,
An input unit comprising two input circuits corresponding to two systems selected by each of the first input / output signal control unit and the second input / output signal control unit based on the control mode, or an output And
An inter-CPU communication circuit unit that transmits and receives the control mode set in the first input / output signal control unit and the second input / output signal control unit;
In response to transmission information from an external host device, input signals from the two systems of input circuits input from the input unit are returned to the host device, or response to transmission information from the host device. A transmission circuit unit that transmits output signals to the output circuits of the two systems instructed by the host device to the output unit;
A dual input signal control device, a control method of a dual output signal control device,
The first input / output signal controller includes a switch for setting the control mode;
Sending the transmission information from the host device sent via the transmission circuit to the other system, receiving input signals of the input circuits of the two systems and sending them to the transmission circuit unit, or A first CPU that receives an instruction value of an output signal of the output circuit of the two systems and sets the output value in the output unit;
A control mode storage unit for storing the control mode set by the switch;
A program storage unit that selects the control mode stored in the control mode recording unit executed by the first CPU and stores a common program and two unique programs corresponding to the control mode;
The second input / output signal controller includes a switch for setting the control mode;
Receives an input signal from the input circuit of the other system and sends it to the first CPU via the inter-CPU communication circuit unit, or from the first CPU via the inter-CPU communication circuit unit A second CPU that receives the instruction values of the output signals of the two systems transmitted to the second CPU and sets them in the output unit;
A control mode storage unit for storing the control mode set by the switch;
A program storage unit for selecting the control mode stored in the control mode recording unit executed by the second CPU and storing the common program and the two unique programs corresponding to the control mode;
With
The first CPU and the second CPU comparing the control modes stored in the respective control mode storage units with each other;
When the control mode matches with “input signal control”, the control mode is selected, the common program and the specific program corresponding to the common program are selected, and the input signals of two systems are transferred to the host system. Returning to the device;
When the control mode matches with “output signal control”, the control mode is selected, the common program and the specific program corresponding to the common program are selected, and the output signals of two systems are sent to the output unit. Steps to set,
If not, returning the mismatch to the higher-level device and stopping the execution of the unique program;
With
A duplexed input signal control device and a duplexed output signal characterized in that the control modes of two systems set in advance are sequentially compared to improve the reliability of the input signals or output signals of the two systems Control method of the control device. The program storage units of the two systems compare the control modes and set a control program to be executed, set a control mode selection / execution control program, a higher-level communication program that transmits and receives the transmission information, and the first input / output A common program comprising a self-diagnostic program of each part of the signal control unit and the first input / output signal control unit, and the inter-CPU communication program;
A unique program comprising an input signal control unique program and an output signal control unique program corresponding to the control mode;
With
The first CPU and the second CPU execute the control mode selection / execution control program in response to transmission information of the host device, select the common program and the unique program, and further select Executing the common program and the unique program,
The first input / output signal control unit and the second input / output signal control unit use the common program and the unique program to make the storage capacity of the program storage unit compact. The method of controlling a duplexed input signal control device and a duplexed output signal control device according to claim 1.   When the control mode is inconsistent, further, when the transmission information includes information on the control mode, compared with the control mode included in the transmission information, if any of the systems match, The duplexed input signal control device and the duplexed output signal according to claim 1, further comprising the step of resetting a matching control mode and returning a mismatch to the upper device. Control method of the control device. The first input / output signal control unit of one system that sets its own control mode based on a preset control mode, which of the two systems is the control mode of input signal control or output signal control And a second input / output signal controller of the other system,
An input unit including two input circuits corresponding to two systems selected by the first input / output signal control unit and the second input / output signal control unit, respectively, based on the control mode;
An inter-CPU communication circuit unit that transmits and receives the control mode set in the first input / output signal control unit and the second input / output signal control unit;
In response to transmission information from the host device, a transmission circuit unit that returns input signals from the input circuits of the two systems input from the input unit to the host device;
A dual input signal control device comprising:
The first input / output signal controller includes a switch for setting the control mode;
The transmission information from the host device sent via the transmission circuit unit is transmitted to the other system, and input signals of the input circuits of the two systems are received and sent to the transmission circuit unit. CPU of
A control mode storage unit for storing the control mode set by the switch;
A program storage unit that selects the control mode stored in the control mode recording unit executed by the first CPU and stores a common program and two unique programs corresponding to the control mode;
The input / output signal controller of the second system includes a switch for setting the control mode;
A second CPU that receives an input signal from the input circuit of the other system and sends it to the first CPU via the inter-CPU communication circuit section;
A control mode storage unit for storing the control mode set by the switch;
A program storage unit for selecting the control mode stored in the control mode recording unit executed by the second CPU and storing the common program and the two unique programs corresponding to the control mode;
With
The first CPU and the second CPU compare the control modes stored in the respective control mode storage units with each other, and when the control mode matches with “input signal control”, Select a control mode, select the specific program corresponding to the common program, and return the input signals of two systems to the host device,
If they do not match, return the mismatch to the host device, stop the execution of the unique program,
A duplexed input signal control apparatus characterized in that the control modes of two systems set in advance are sequentially compared to improve the reliability of the input signals of the two systems. The program storage units of the two systems compare the control modes and set a control program to be executed, set a control mode selection / execution control program, a higher-level communication program that transmits and receives the transmission information, and the first input / output A common program comprising a self-diagnostic program of each part of the signal control unit and the first input / output signal control unit, and the inter-CPU communication program;
A unique program comprising an input signal control unique program and an output signal control unique program corresponding to the control mode;
With
The first CPU and the second CPU execute the control mode selection / execution control program in response to transmission information of the host device, select the common program and the unique program, and further select Executing the common program and the unique program,
The first input / output signal control unit and the second input / output signal control unit use the common program and the unique program to make the storage capacity of the program storage unit compact. The duplexed input signal control device according to claim 4. The first input / output signal control unit of one system that sets its own control mode based on a preset control mode, which of the two systems is the control mode of input signal control or output signal control And a second input / output signal controller of the other system,
An output unit including two output circuits corresponding to two systems selected by the first input / output signal control unit and the second input / output signal control unit, respectively, based on the control mode;
An inter-CPU communication circuit unit that transmits and receives the control mode set in the first input / output signal control unit and the second input / output signal control unit;
In response to transmission information from the host device, a transmission circuit unit that transmits output signals to the output circuits of the two systems instructed from the host device to the output unit;
A dual input signal control device comprising:
The first input / output signal controller includes a switch for setting the control mode;
The transmission information from the host device sent via the transmission circuit unit is transmitted to the other system, and the instruction values of the output signals of the output circuits of the two systems are received and set in the output unit A first CPU to
A control mode storage unit for storing the control mode set by the switch;
A program storage unit that selects the control mode stored in the control mode recording unit executed by the first CPU and stores a common program and two unique programs corresponding to the control mode;
The input / output signal controller of the second system includes a switch for setting the control mode;
A second CPU that receives instruction values of output signals of two systems transmitted from the first CPU to the second CPU via the inter-CPU communication circuit unit and sets the output values in the output unit;
A control mode storage unit for storing the control mode set by the switch;
A program storage unit for selecting the control mode stored in the control mode recording unit executed by the second CPU and storing the common program and the two unique programs corresponding to the control mode;
With
When the first CPU and the second CPU are compared with each other in the control mode stored in the respective control mode storage unit, and the control mode matches with “output signal control”, the control mode To select the common program and the corresponding unique program, and return the output signals of two systems to the output unit,
If they do not match, return the mismatch to the host device, stop the execution of the unique program,
A duplex output signal control apparatus characterized in that the control modes of two systems set in advance are sequentially compared to improve the reliability of the output signals of the two systems. The program storage units of the two systems compare the control modes and set a control program to be executed, set a control mode selection / execution control program, a higher-level communication program that transmits and receives the transmission information, and the first input / output A common program comprising a self-diagnostic program of each part of the signal control unit and the first input / output signal control unit, and the inter-CPU communication program;
A unique program comprising an input signal control unique program and an output signal control unique program corresponding to the control mode;
With
The first CPU and the second CPU execute the control mode selection / execution control program in response to transmission information of the host device, select the common program and the unique program, and further select Executing the common program and the unique program,
The first input / output signal control unit and the second input / output signal control unit use the common program and the unique program to reduce the storage capacity of the program storage unit. The duplex output signal control apparatus according to claim 6.   When the control mode is inconsistent, further, when the transmission information includes information on the control mode, compared with the control mode included in the transmission information, if any of the systems match, The duplexed input signal control device according to claim 4 or the duplexed output according to claim 6, wherein the matched control mode is reset and a mismatch is returned to the upper device. Signal control device.

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