JPS59231947A - Time division multiplex transmission system - Google Patents

Abstract

PURPOSE:To reduce the response time of a CPU by providing an interruption selecting circuit selecting whether or not the transmission of an interruption request signal is inhibited to a terminal device, and calling the terminal device inhibited for the transmission of the interruption request signal from the CPU by individual polling to allow the terminal device to return a signal. CONSTITUTION:The terminal device 2 has a supervising input change detecting circuit 2a detecting a change in a supervised input WS and when the circuit 2a detects the change in the supervised input WS, the circuit 2a outputs an interruption signal IS to a terminal signal processing circuit 2b. This line 2b transmits the interruption request signal to the CPU via a signal line 3 during the reception of the interruption request standby signal VS of the transmission signal. An interruption selecting circuit 4 selects whether the transmission of a signal IRQ is inhibited or not, and the terminal device 2 is operated in the high speed mode outputting the signal IRQ at the change in the supervised input when an interruption selection signal E/D is logical 1 and operated in the low speed response mode not outputting the signal IRQ when the signal E/D is logical 0.

Description

[Detailed description of the invention] 〔Technical field〕 The invention relates to time division multiplex transmission systems.

[Background technology]

Conventionally, in this type of time/minute lft1 multiplex transmission system, as shown in FIG.
A number of terminal devices (2) having addresses are connected via the same signal line (3), and the central control unit 11) sends and outputs a transmission signal with the unique address as address data, and the terminal device ( 2) is individually called, and data such as control data and monitoring data is exchanged between the central control unit fll and the called terminal (2). Figure 2 shows an example of the format of the transmission signal, where PS is a start signal, VA is an address signal that transmits address data, VC is a control signal that transmits control data, and VW is a return signal that sets a return waiting period. This is a standby signal, and the transmission signal is a Norse width modulated bipolar signal.

Now, when the terminal device (2) receives a transmission signal containing address data that matches its own unique address, it takes in the control@data of the transmission signal and outputs a control output C8 to control the load. At the same time, during the return standby period set by the return standby signal yw, a return signal for returning monitoring data etc. to the central control unit ill is sent out based on the monitoring input condition.

By the way, in this type of time division multiplex transmission system, each terminal (2) is accessed sequentially on a cyclic basis, so as the number of terminals increases, the time required to access all terminals (2)... increases. The terminal device (2) has become long.
There was a problem in that the response after there was a change in the monitoring human power WS was delayed, causing some practical inconvenience. In other words, the status of the monitored input pool can be checked by accessing both the terminal device (2) whose input changes frequently and the terminal device (2) whose input changes only rarely. This results in a lot of unnecessary access, and the frequency of accessing terminals (2) that have frequent inputs decreases.For example, even if you operate a wall switch type terminal (2), the corresponding lighting load There is a problem in that the control 11 takes time and gives a strange feeling to the user.

[Purpose of the invention]

The present invention has been made in view of these problems, and its purpose is to issue an interrupt request signal from the terminal to the central control unit when a change occurs in the monitoring input, and to
The central controller side moves to the interrupt boring stage, reads the monitoring data sent back from the terminal device that made the interrupt request, and processes it accordingly, from when the monitoring input is received until the central controller responds. In addition to reducing the time required for
By providing an interrupt prohibition selection means for selecting whether or not to prohibit the transmission of an interrupt request signal, interrupt requests due to non-urgent monitoring inputs can be eliminated and responses to other monitoring inputs can be made faster. It is in.

[Disclosure of the invention]

Embodiment FIG. 5 shows the former read of the transmission signal sent from the central control unit fll, in which an interrupt request signal return standby signal ys is set before the start signal psO, and the start signal ps is set before the start signal psO.
and the address signal VA are provided with a 7-word signal VM that specifies whether it is an individual baud 7-ad in normal use or an interrupt 7-ad, and a set of transmission signals consisting of these signals is sent to the central controller. [Sent from +1. Here is the normal individual poll: 7
Similar to the conventional example, the J-mode refers to a mode in which a predetermined (or entire) terminal device (2) is sequentially accessed to perform side-down monitoring. is the terminal device (2) 7°, which will be described later.

This refers to a t-do that accesses and monitors information at the AD rack level. The terminal device (21 has a monitoring input change detection circuit (2a) for blowing out changes in the monitoring input (2) as shown in FIG. 4,
When the monitoring input change detection circuit (2a) detects a change in the monitoring input, the interrupt signal I8 is sent to the terminal signal processing circuit (2b).
Output to. The terminal signal processing circuit (2b) is configured to send interrupt request signals IR and Q to the central controller fi+ via the signal line 13) while receiving the interrupt request standby signal ys of the transmission signal. The interrupt selection means (4) formed by a switch or the like selects whether or not to prohibit the transmission of the interrupt request signal IRQ. When the monitoring input changes, the interrupt request signal IR, Q is output in the high-speed response mode.When the interrupt selection signal LE is "O", the interrupt request signal IRQ is not output. However, when operating in slow response mode, a timer definitively checks whether there is a change in the monitoring input using an individual Bauley J7 code (hereinafter referred to as a timer code). ).Furthermore, the terminal processing circuit (2b) inputs a monitoring input and sends the monitoring data as a return signal R8 to the central control unit 11) while receiving the return standby signal VW, or when the address signal VA is When the address data matches the set address, it reads the control data of the next side signal VC, outputs the control output 03, and performs arithmetic control operations as the terminal device 21, such as controlling the load. Each terminal device 12) is the fifth
As shown in the figure, the program is divided into 199 sections and is accessed every 0'J when the above-mentioned interrupt data is input.For example, if the address signal VA is 8 pits, the upper type pits are accessed every 0'J. The same terminal device (2) group, that is, divided into 16 blocks as 1 o1 request for every -6 terminals, and is sent at the time of interrupt Holy J7 mode.
When the address data of the upper Φ pit for 'Tsuku call match, each terminal device (2) of these blocks is called at the same time, and an interrupt of the monitoring input conversion detection circuit (2a) of the called terminal device [2] is generated. The terminal device 21 outputting the signal sends the lower Φ pit of its own address to the central control unit 11 while receiving the return standby signal yw.

The data of this lower Φ pit is sent out by the following methods. In other words, the return signal is set to 8 hits, and the logic value data of each hit in the lower 4 pits of the address is formed with a 2-bit code signal [7, for example, if the logic value is "1", the code is "10//". If the logic case is "Ol", a code 1 signal of "01" is assigned. Therefore, in “o o o o” [the address data of a certain lower Φ pit is “Ol” “01
The return signal μs of 8 pins 1 lead is “01” “01”,
Also, the address data of the lower four pits is "1100", and the return signal is the eight pits of "10", "10", "01", and "01". Here, if the return signal part is a logic value "1", it is a wide pulse, and if the logic value is "0", it is a middle pulse, each forming a 1-pit signal. If the predetermined value of the data in the data is “1”
”, the corresponding return signal interval is shown in Fig. 6(a).
As shown in FIG. 6(b), the signal becomes a 2-pit signal of "10". On the other hand, if the predetermined value is "0", the corresponding return signal R8 becomes "01" as shown in FIG. 6(b). It becomes a 2-pit signal. Therefore, when these signals are sent out at the same time, the return signal R8 corresponding to the predetermined number of signals sent out on the signal line (3) becomes "11". Since this "11" code signal does not indicate the logical value "1" or '0', the central control unit (1) detects this code signal and simultaneously sends back signals from multiple terminals (2). By the way, the central control unit (1) combines the returned address data of the lower level pits with the address data of the upper four pits for block calling and issues an interrupt request. Identify the interrupt request terminal (2) that sent the signal IRQ, and set the interrupt request terminal +21 V
A transmission signal of an individual call C-code is sent to C to have the monitoring data returned.

However, 5. Return signals IL9 from multiple terminals 12) at the same time
If there is, it is not possible to identify the interrupt requesting terminal (2), so the check is performed by calling each of the terminals (2) individually using the polly J7 code and having them send back the monitoring data. T-tsuku. In this case, the interrupt status ST is also returned at the same time in the return signal section, and if this interrupt status ST is "1", it means that the input has changed, that is, it is the interrupt request terminal (2). It shows.

In this way, after the monitoring data of the interrupt request terminal (2) is returned and taken in, the central control unit fil sends the interrupt request terminal (2) to the interrupt request terminal (2). Cancels the interrupt operation and completes the interrupt operation.

The operation of the embodiment will be explained below at 70 in FIGS. 7 and 8.
-Explain using a chart. Now, the central controller fi
When the operation of 1 starts, as shown in Figure 7 (ra), the timer that sets the 1,000-nick tie of the terminal +21, which is set to low-speed response mode, is first activated.
If the timer is "0", it is checked whether the interrupt poll link mode (hereinafter referred to as IRQ! need) is in effect.On the other hand, if the timer is "1" If so, use j721 to set the timer flag FT.
The address data AI(
t is selected, and it is manually checked whether it is in IRQ mode or not.
Required. Here, the reason for ■RQv need is that "1" of the interrupt request signal IFLQ is detected at 4, and IRQ is detected at 4.
This is a case where the OI sock address AHi of the terminal device (2) to be checked with the IR and Q5 codes is set. By the way, at the start, FT is /
/ 0 //, since the IRQ is “0”, (752
), the transmission signal of the individual Bauley J mode (hereinafter referred to as MZP mode) is sequentially transmitted to each terminal (2) cyclically, and at (753), the return signal from each terminal (2) is transmitted. IR and Q are “1” on the side.
Check Kaduka. If IR,Q is “1”, IFLQ5- code is set and in the next routine (7
41) ■ Sends out the Qt-code transmission signal, receives the return signal 4 from the terminal (2) at
Move to SUB. In this case, IRQ=1 is FT-
Since the priority is higher than 1, the IRQ code operation is performed preferentially even if FT is 1''.Next, F'T
is ``1'' and the IR, Q5-code operation is completed or IR,Q is ``0'', the transmission signal in the timer mode is transmitted to the terminal device 12 in the slow response mode in (753).
), receives the return signal part in (764), and executes the blue prediction sUB that performs the holy signal processing in (77).In addition, in the actual example, the timer mode operation is
, Q is approximately the same as the t-mode operation. Figure 7: 0) Port processing is the flow of UB, and the transmission signal sent previously in (81) calls the terminal device (2) every time the transmission signal is sent. If there is a pro-policy 7 code, check the return signals R and S with (S convex 1), and if there is no reply, check the terminal device that issued the IRQ in the pro-1 request that was sent. 2) is determined to be absent, and increases the address NH by 1 with (S3 convex), and checks whether it is in timer mode with (836), and if it is not in timer mode, R
BT. On the other hand, if there is a reply, check whether there is any duplication of the return signal R8 at (S convex 2), and if there is no duplication, at (835) it is based on the lower-order pit of the returned address data. The address data (8 pits) of the MZP mode transmission signal for directly calling the terminal device (2) specified by the message is set and returned (laET).

Also, if the return signal ratios S overlap (834)
The address data AL of the lower register of the MZP mode transmission signal for individually calling the terminal device 12+ in the debug is set to "O", and the return: 7 (FLET) is performed. Here, the address data set in (834), (835), and (S3'3) are (741), (752), and (7).
53). Next, in (821) it is checked whether the mode is MZPt-mode, and if it is MZP mode, (
822), the presence or absence of a reply is checked, and then (824)
), it is checked whether the interrupt status 8T is ``1'', that is, whether it is a reply from the interrupt request terminal (2), and if ST is ``1'', the returned monitoring data is checked in (825). The data is processed as a change in the monitored input, and if it is an IQr need, the IRQE-mode is canceled at (827) and the process returns (RI18T). If it is in timer mode, set the t-do to poli and 7 to 7-do in (828), and in the next routine (836) and (837), access to the terminal to be monitored in timer mode] 2) is performed. Check whether it has been completed, and if it has been completed (8 convex 8), set the timer fludge [, Ir to 1-0 and return (RET).
)do.

Fig. 8 is a flowchart showing the operation of the terminal (2). When a transmission signal is received at terminal (2), it is not switched (at terminal 2) it is checked whether it is a normal MzP'f need based on the mode signal VM. If it is a normal MZPt-mode (831
), an address check is performed, and if an address match is obtained, the interrupt flag is returned from (832) to (8 convex squares).
l” and interrupt status S.
T is read, and in (835) a return signal FL8 consisting of monitoring data and interrupt status 8T is sent out. Subsequently, in (836), a control output method for load control is formed based on the control ejJ data of the transmission signal. Next, if it is not MZPt-mode, use (&4) to enter interrupt confirmation mode (hereinafter ACII-
) or IRQr need is checked and A
In the case of CK'f need, address check is performed at (852).
When the check is performed and an address match is obtained (862), the interrupt flag is set to "0" and the interrupt operation is completed. On the other hand, in the case of IR, Q7-code, the upper addresses are compared in (851), and if a match is obtained in the upper addresses, it is checked in (861) whether or not the interrupt flag is "1". 1", return signal R8 at (862)
The lower data (4 pits) of the address is sent as .

Next, in (871), it is checked whether the interrupt selection signal Φ is "1", and if it is '1', the monitoring input is detected in (872), and the change in the monitoring input is detected in (87 convex). If there is a change, the interrupt flag is set to ``1'' in (874). When the interrupt flag is set to ``1'' in this way, (875
) (876), the return waiting period of the interrupt request signal is checked, and the interrupt request signal If'LQ is sent out with a predetermined tie 3-J. By the way, the interrupt selection signal Φ is “O”
If so, the processes (871) to (876) are not performed,
Even if the monitoring input changes, the interrupt request signal IRQ is not generated. Therefore, by setting the interrupt selection means of the monitoring terminal (2) to "0", which does not require a slow response, interrupt requests due to changes in the monitoring input that do not require an emergency can be avoided. Interrupt selection signal H
This means that it is possible to respond more quickly to changes in the monitoring input of other terminals for high-speed response in which "1" is set.

〔Effect of the invention〕

As described above, the present invention connects a large number of terminal devices to a central control unit via signal lines, and uses α
The central controller sequentially cycles through the return standby signals for the
Individual polling t-do, which transmits control data to the called terminal by J and returns monitoring data from the called terminal to the central control unit during the return waiting period, and monitor input from the terminal. When an interrupt request signal transmitted at the time of a change in is received, the interrupt request terminal is activated by transmitting address data for block calling and a return standby signal from the central controller. It is possible to freely switch between an interrupt polling mode in which address data is returned from the terminal and the interrupt request terminal is individually called and monitoring data is returned, and it is possible to select whether or not to prohibit the terminal from transmitting an interrupt request signal. In addition to providing an interrupt selection means to
The central control unit calls terminal devices that are prohibited from issuing interrupt request signals in individual polling mode and returns monitoring data, and when a change occurs in the monitoring input, the terminal device calls the central control device when a change occurs in the monitoring input. Sends an interrupt request signal to the device 1, and issues an interrupt request signal to the central controller.
The system reads and processes the monitoring data sent back from the terminal device that made the interrupt request, reducing the time from when there is a monitoring input until the central control unit responds. In addition, an interrupt prohibition selection means is provided to select whether or not to prohibit the transmission of interrupt request signals, so interrupt requests due to non-urgent monitoring inputs can be eliminated and responses to other monitoring inputs can be made. The advantage is that it can be done more quickly.

[Brief explanation of the drawing]

FIG. 41 is a schematic configuration diagram of a time division multiplex remote control system, FIG. 2 is an explanatory diagram of the format of the same transmission signal, FIG. The 4th factor is a schematic block diagram of the same terminal device, the 5th figure is a schematic configuration diagram for explaining the pro-rough conversion used in the above, and the 6th figure (
a) to (C) are waveform diagrams for explaining the return signals of the same terminal device, FIG. , +tld central control device, 12) is terminal device, (3
) is a signal line, and (4) is an interrupt selection means. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] 11) A large number of terminal devices are connected to the central control device via signal lines, and the central control device sequentially sends address data for individual calling, control data, and a return standby signal for setting the return standby period to call the terminal devices individually. An individual policy code that transmits control data to the called terminal by transmitting it to the click, and returns monitoring data from the called terminal to the central control unit during the return waiting period, and the monitoring input from the terminal. When an interrupt request signal transmitted at the time of a change is received, the address data for calling a block that calls a group of terminals block by block and a return standby signal are transmitted from the central control unit, and the address data is returned from the interrupt requesting terminal. The interrupt mode can be freely switched between the interrupt interrupt mode, which calls the interrupt request terminal individually and sends back the monitoring data, and selects whether or not to prohibit the terminal from transmitting an interrupt request signal. A time division multiplex transmission system comprising a selection means and a central control unit that calls terminal devices prohibited from transmitting interrupt request signals at appropriate individual polls and sends back monitoring data. .