JP2767473B2 - Loom data transmission system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loom data transmission system useful for centrally controlling a large number of looms by a single host computer.

2. Description of the Related Art A so-called centralized control system for centrally controlling and controlling a large number of looms by one host computer via a communication line has been widely adopted (for example, Japanese Patent Application Laid-Open No. 61-296148, No. 61-231245).

The biggest problem in constructing such a system is the restriction that comes from the communication speed of the communication line. That is, in general, when many tens or hundreds of looms are controlled by one host computer, the data transmission time per one loom can be controlled using a high-speed communication line of 9600 baud or more. Depending on the amount of data, one second or more is often required, and with simple scanning control, the waiting time for data communication becomes one minute or more, and it is almost impossible to create a practical system.

Therefore, in order to solve such a problem, it is conceivable to introduce a full-duplex communication system or a look-in circuit system adopted in a large-scale computer network system. The former is a data communication method in which data can be sent from both the computer and the terminal at the same time.The latter is a communication line, a processing request line from the terminal, and a confirmation line from the computer. In this method, a terminal address line is prepared, and the requesting terminal is identified on the computer side.

Problems to be Solved by the Invention However, in the case of the conventional technique, hardware and software are all complicated, and the number of required wiring cables between the host computer and each loom corresponding to the terminal is extremely large. Therefore, it is extremely difficult to apply the method to a production site such as a woven fabric factory, even if the environment is highly protected.

Therefore, an object of the present invention is to provide a cable between a host computer and a loom, in addition to a communication line, only two cables, a request signal line and a reception signal line, in view of the problem of the related art. It is an object of the present invention to provide a data transmission system of a loom that can effectively eliminate restrictions caused by the communication speed even in a system having several hundred looms.

Means for Solving the Problems According to a first aspect of the present invention, there is provided a communication line for connecting a host computer and a loom, and all the looms are connected in parallel. A request signal line that transmits a signal to the host computer and all looms are connected in a chain, and a reception signal from the host computer is transmitted to a lower loom on the condition that the upper loom does not output the request signal. The gist of the present invention is to provide a reception signal line.

According to a second aspect of the present invention, a communication line for connecting a host computer and a loom, a plurality of repeaters for controlling a plurality of looms, and all looms belonging to the respective repeaters are connected in parallel. A main request signal line for transmitting a signal to the repeater to which the loom belongs; and a main request for connecting all the repeaters in parallel and transmitting a request signal reaching each repeater to the host computer via the sub request signal line. A signal line and all repeaters are connected in a chain, and a main signal transmitting a reception signal from a host computer to a lower repeater is provided on condition that a loom belonging to a higher repeater does not output a request signal. The reception signal line and all the looms belonging to each repeater are connected in a chain, and the relay to which the loom belongs via the main reception signal line, provided that the higher-order loom does not output the request signal. Further comprising an auxiliary reception signal line for transmitting a reception signal to the lower loom to reach as its gist.

However, here, “upper” means that the reception signal line, the main reception signal line is at a position near the host computer, and the sub reception signal line is at a position near the repeater, "Lower"
It means that it is in a distant position.

In the first and second inventions, the host computer outputs a reception signal in response to the request signal, sends out a device number request command via a communication line, and then checks the device number data to check the request item. On the other hand, the loom outputs a request signal at the time of occurrence of the request item, and if the reception signal has been input, the loom corresponds to the device number request command and transmits the device number data and the request item command via the communication line. Can be sent out.

According to the first aspect of the invention, when a request signal is generated in an arbitrary loom, the request signal is transmitted to the host computer via the request signal line.
The host computer can output a reception signal in response to the request signal. At this time, the reception signal line
All the looms are connected in a chain, and this reception signal is transmitted to the lower looms on condition that the upper looms do not output the request signal. Of the looms, the looms are not transmitted to the lower looms beyond the highest looms. In this way, it is possible to select one specific loom that is outputting the request signal,
Thereafter, data communication may be performed between the loom and the host computer via the communication line.

According to the configuration of the second invention, the host computer, the main request signal line, the main reception signal line, and the repeater
Each corresponds to the host computer, the request signal line, the reception signal line, and the loom in the first invention,
Further, the repeater, the sub-request signal line, the sub-reception signal line, and the loom correspond to these constituent members in the first invention, respectively. Thus, in the same manner as in the first invention, a specific repeater can be selected, and a specific loom can be selected via the specific repeater. However, the specific repeater is the highest-order repeater to which the loom outputting the request signal belongs, and the specific loom belongs to the selected repeater and outputs the request signal. This is the highest among looms.

When the host computer sends out the reception signal and the machine number request command in response to the request signal from the loom, the loom selects one of the highest-order looms to which the reception signal can reach from among the output request signals. You. The loom sends out the machine number data and the request item command in response to the machine number request command, and in response to this, the host computer checks the machine number data of the loom and sends a request to the loom. The processing operation corresponding to the item command can be executed and the result can be transmitted. Therefore, each loom can perform data communication with the host computer without substantial waiting time.

Embodiments Hereinafter, embodiments will be described with reference to the drawings.

The data transmission system of the loom includes a reception line AL, a transmission line DL, a request signal line QL, and a reception signal line RL (FIG. 1), one host computer HC, a plurality of looms L1, L2 ...

Each of the looms Li (i = 1, 2,...)
The reception line AL and the transmission line DL connect the host computer HC and the communication control means 11 of the loom Li. However, the reception line AL and the transmission line DL form a bidirectional communication line, and can perform parallel transmission or serial transmission. Also, receive line AL, transmit line
Signal amplifiers 12, 13, 31, and 32 are interposed on the DL loom Li side and the host computer HC side, respectively, and terminal codes A, D, A and D shall be added.

The loom Li includes a flip-flop 14, and its set terminal S and reset terminal R are both connected to the communication control unit 11.
The output terminal Q is connected to a request signal line QL from the host computer HC via an inverting amplifier 15 having an open collector output, for example. Also, the inverted output terminal is drawn out to the outside via the NAND gate 16,
It is input to the lower loom Li + 1 via the reception signal line RL. The other input terminal of the NAND gate 16 is connected to the reception signal line RL from the higher-order loom Li-1 via the inverting amplifier 17, and the host computer HC connects to the uppermost loom L1. Are connected to the reception signal line RL. That is, all the looms Li are connected in parallel to the request signal line QL, while the reception signal line RL
Connects all the looms Li in a chain via an inverting amplifier 17 and a NAND gate 16, and the upper side of the uppermost loom L1 is connected to the host computer HC. In addition, inverting amplifier
The output of 17 is also branched and input to the communication control means 11,
Inverting amplifiers 33 and 34 are interposed on the host computer HC side of the request signal line QL and the reception signal line RL.

The host computer HC to which the request signal line QL and the reception signal line RL are connected has terminal codes Q and R, and the loom Li
In the side, the terminal code Q is defined for the former, and the upper side and the lower side are defined for the latter as the terminal codes R1 and R2, respectively.

Now, from the communication control means 11 of the loom Li, the request signal Sq
Assuming that the signal is output to the set terminal S of the flip-flop 14, the flip-flop 14 is set by this, and the low-level request signal Sq is displayed on the request signal line QL.
i is output. Therefore, the request signal line QL can transmit the request signal Sqi output from any loom Li to the host computer HC. Note that this is the same even when the request signals Sqi, Sqj,... Are simultaneously output from two or more looms Li, Lj,.

On the other hand, when a low-level reception signal Sri is output from the host computer HC, the reception signal Sri first goes high through the inverting amplifier 17 of the highest-order loom L1, and acts in a direction to open the NAND gate 16. However, the loom L1
NAND flip-flop 16 remains closed when flip-flop 14 of
Sri is not transmitted to the lower loom L2. Conversely, when the flip-flop 14 is reset, the reception signal Sri can pass through the NAND gate 16 and reach the lower loom L2. Similarly, transmission of the reception signal Sri transmitted to the loom L2 to the lower loom L3 is controlled by the state of the flip-flop 14 of the loom L2, and so on. Since the flip-flop 14 of each loom Li is set when the loom Li is outputting the request signals Sq and Sqi, the reception signal line RL is eventually turned on by the upper loom Li outputting the request signal Sqi. On the condition that the loom does not exist, the reception signal Sri can be transmitted to the lower loom Li + 1.

In the loom data transmission system having such a configuration, the communication control means 11 of the host computer HC and the loom Li operates as shown in FIGS. 2 and 3, respectively.

First, the host computer HC determines that there is no request signal Sqi from the loom Li (step (H3) in FIG. 2,
Hereinafter, simply as (H3)), by performing data communication with the loom Li via the reception line AL and the transmission line DL, data generated in the loom Li is sequentially scanned and collected, and regular monitoring is performed. The operation and the like are repeatedly executed ((H1) to (H5)). In the scanning communication processing in step (H2), the host computer HC
Is a machine number address (refers to an address number designating a specific loom Li, via a transmission line DL) to a specific loom Li.
In the loom Li corresponding to the designated machine number, corresponding data may be transmitted via the reception line AL (step (L3) in FIG. 3 (B)). Or (L5), hereinafter simply referred to as (L3) to (L5)).

On the other hand, during this time, if an item that needs to be processed irregularly with respect to the host computer HC (hereinafter referred to as a request item) occurs in any of the looms Li, the reception signal Sri
Is not input to the communication control means 11 (step (L1) in FIG. 3A, hereinafter simply referred to as (L1)), the communication control means 11 Output to the loop 14 (L2). As a result, the flip-flop 14 is set, and the request signal Sqi is transmitted to the host computer HC via the request signal line QL (the hatched line L2 in FIG. 4, hereinafter simply referred to as (hatched line L2)). Steps (L1) and (L2) in FIG. 3A operate in an interrupt manner in response to the occurrence of a request item.

When the request signal Sqi reaches the host computer HC (H
3) The host computer HC outputs the reception signal Sri on the reception signal line RL (H6), and sends out the machine number request command on the transmission line DL (H7, diagonal line H7).

As described above, the loom Li that the reception signal Sri can reach is
Flip-flops 14 and NAND gates 16 included in the loom Li
Accordingly, the highest one of the looms Li that are outputting the request signal Sqi is automatically selected. On the other hand, since the machine number request command is input to all the looms Li in parallel, in response to this, the communication control means 11, 11,... Of all the looms Li are simultaneously activated (FIG. 3 (B)). .

The communication control means 11 started in this manner first confirms that the communication control means 11 has been started in response to the device number request command (L
3) Then, it is checked whether the reception signal Sri has arrived (L6), and on condition that the request signals Sq and Sqi have been output (L7), the machine number data and the request item command are transmitted. It is transmitted on the line DL (L8, oblique line L8). The reception signal Sri reaches the loom L1, L2... Li-1 higher than the loom Li selected by the flip-flop 14 and the NAND gate 16, but the request signal Sq and Sqi have already been output therein (L6). Are not present (L7), so those looms L1, L2 ...
Li-1 does not perform any operation corresponding to the machine number request command. Also, since the reception signal Sri does not reach the loom Li + 1, Li + 2... Lower than the loom Li (L6), similarly, these do not perform corresponding operations.

In this manner, only the highest-order loom Li among the ones that output the request signals Sq and Sqi can respond.

When the machine number data and the request item command are transmitted from the loom Li, the host computer HC receives them (H
8) After decoding the content (H9), the reception signal Sri is reset (H10, hatched H10). Subsequently, the processing content corresponding to the request item command is executed (H11, straight line H11), and the request data is sent out on the transmission line DL (H12, diagonal line H12).
Return to the normal scanning communication routine (H4).

When the loom Li receives the request data (L9), it processes the data (L10, straight line L10) and resets the request signals Sq and Sqi (L11, oblique line L11).

Upon receiving the request data (L9), the loom Li may immediately reset the request signals Sq and Sqi (L11), and then perform data processing (L10). At this time, the host computer HC transmits the request data (H1
2) By setting the return destination to an intermediate point between steps (H2) and (H3), it is possible to check whether or not another request signal Sqi exists without intervening a normal scanning communication operation. (H3).

The system as described above uses the request signal Sqi from the loom Li.
Accordingly, the high-speed calculation function of the host computer HC can be used at any time, which is particularly useful when the host computer HC performs complicated calculation processing. For example, as a request item command from the loom Li, the pattern content of the abnormality that occurred in the loom Li and its analysis instruction are transmitted, and the host computer HC analyzes and diagnoses the content, and then transmits the analysis result to the request data. And send it to the loom Li to provide the operator with appropriate repair instruction information by appropriately processing and displaying the contents of the request data obtained in this way. Can be.

Another Embodiment A plurality of repeaters Cj (j = 1, 2,...) Can be inserted between the loom Li and the host computer HC (fifth embodiment).
Figure). The loom Li at this time is divided into groups equal to the number of repeaters Cj so that a plurality of looms Ljk (k = 1, 2,...) Belong to each repeater Cj. One group of loom Lj
k shall be supervised.

The repeater Cj includes signal amplifiers 21d, 22d, 23d, 21a, 22a, and 23a for relaying and branching the transmission line DL and the reception line AL.
The transmission line DL and the reception line AL from the host computer HC are connected to all the repeaters Cj, and are connected to all the looms Ljk belonging to the repeater Cj via the respective repeaters Cj. ing.

The request signal Sqj from the loom Ljk is a sub-request signal line QLs
Through the relay Cj. However, all the looms Ljk belonging to the repeater Cj are connected in parallel to the sub-request signal line QLs. The sub-request signal line QLs is connected to the main request signal line QLm via the AND gate 24 inside the repeater Cj.
Is connected to the host computer HC after connecting all the repeaters Cj in parallel.

From the host computer HC, the main reception signal line RLm
Has been pulled out. Main reception signal line RLm is connected to repeater C
All repeaters Cj are connected in a chain via an inverting amplifier 25 and a NAND gate 26 in j. However, NAND gate
The request signal Sqj from the loom Ljk is also branched and input to 26.

The output of the inverting amplifier 25 is branched and input to another inverting amplifier 27, drawn out of the repeater Cj, and output to the sub-request signal line RL.
Connected to the loom Ljk as s. Secondary reception signal line RLs
Are the terminal codes R1, R of all the looms Ljk belonging to the repeater Cj.
By passing through 2, the loom Ljk is connected in a chain shape.

In the repeater Cj having such a configuration, the AND gate 24 connects the sub request signal line QLs to the main request signal line QLm in parallel, and the inverting amplifier 25 and the NAND gate 26 are connected to the loom Ljk
Since it corresponds to the inverting amplifier 17 and the NAND gate 16 in the middle, the operation can be performed essentially in exactly the same manner as in the previous embodiment except for the communication control means 11 and the flip-flop 14 of the loom Li. That is, the repeater Cj generates a request signal Sqj from the loom Ljk belonging to the relay Cj, and reaches the repeater Cj via the sub-request signal line QLs, as a request signal Sqi, via the main request signal line QLm, It can be transmitted to the host computer HC. Further, the reception signal Sri from the host computer HC can reach the loom Ljk via the highest one of the repeaters Cj to which the loom Ljk generating the request signal Sqj belongs. However, when a plurality of looms Ljk belonging to the same repeater Cj are simultaneously outputting the request signal Sqj, the highest one is selected.

In this manner, in this embodiment, the reliability of the entire network can be improved by dividing a large number of looms Ljk by the repeater Cj to form a tree-like network.

The looms Li and Ljk may be provided with a relay Ry for detecting whether the power supply AC is turned on or not (FIG. 6). The output of the NAND gate 16 is drawn through the normally open contact a of the switching contact of the relay Ry, and the normally closed contact b is branched and connected to the input of the inverting amplifier 17. When the power supply AC of the looms Li and Ljk is cut off, the relay Ry returns and the terminal symbols R1 and R2 can be automatically bypassed, so that the reception signal line RL and the sub reception signal line RLs are connected to the looms Li and Ljk. , Even if they are connected in a chain,
Of the system can be avoided.

Effects of the Invention As described above, according to the first invention of the present application, a communication line, a request signal line, and a reception signal line are provided between a host computer and a loom, and the request signal line is All the looms are connected in parallel, and the reception signal line is connected to all the looms in a chain to identify and select the highest level of the looms that output the request signal, Since the data communication with the computer can be executed at any time, the problem of the waiting time due to the restriction of the communication speed of the communication line can be effectively eliminated, and the additional cables required include the request signal line and the reception signal line. Since only two of the above are sufficient, there is an excellent effect that it can be applied to a woven fabric factory without any trouble.

According to the second invention, the loom is divided into a plurality of groups via the repeater, so that it is possible to construct a highly reliable tree-like network having functions equivalent to those of the first invention.

[Brief description of the drawings]

1 to 4 show an embodiment, FIG. 1 is an overall system diagram, FIGS. 2, 3 (A) and 3 (B) are flowcharts,
FIG. 4 is an explanatory diagram of the operation. FIG. 5 is a diagram corresponding to FIG. 1 showing another embodiment. FIG. 6 is a main part system diagram showing another embodiment. HC: Host computer Li, Ljk: Loom QL: Request signal line QLm: Main request signal line QLs: Sub request signal line RL: Acceptance signal line RLm: Main accept signal line RLs: Sub accept signal Line Cj: Repeaters Sq, Sqi, Sqj: Request signal, Sri: Acceptance signal

Claims (3)

(57) [Claims] 1. A communication line for connecting a host computer and a loom, all the looms are connected in parallel, a request signal line for transmitting a request signal from the loom to the host computer, and all the looms are connected in a chain. And a reception signal line for transmitting a reception signal from the host computer to the lower loom on condition that the upper loom does not output the request signal. 2. A communication line for connecting a host computer and a loom, a plurality of repeaters controlling a plurality of looms, and all looms belonging to each of the repeaters are connected in parallel, and a request signal from the loom is transmitted. And a sub-request signal line that transmits the request signal to the repeater to which the loom belongs, and a main signal that transmits a request signal that reaches the repeater via the sub-request signal line to the host computer by connecting all the repeaters in parallel. A request signal line and all the repeaters are connected in a chain,
A main reception signal line for transmitting a reception signal from a host computer to a lower repeater, provided that the loom belonging to the higher repeater does not output the request signal; and all looms belonging to each of the repeaters. Are connected in a chain, and provided that a higher-order loom does not output a request signal, a sub-transmitting a reception signal reaching the repeater to which the loom belongs via the main reception signal line to a lower-level loom. A loom data transmission system comprising a reception signal line. 3. The host computer outputs a reception signal in response to the request signal, sends out a machine number request command via a communication line, confirms machine number data, and processes the requested item. A request signal is output at the time of occurrence of the request item, and the condition number data and the request item command are transmitted via the communication line in response to the device number request command on condition that the reception signal is confirmed. The loom data transmission system according to claim 1 or 2, wherein: