JPH07154393A - Data transmitting system for remote control system - Google Patents

Abstract

PURPOSE:To make a line laying area narrow and to make the control start time of a designated operating slave station in a rear step early by forming a remote control system by serially connecting a master station and plural slave stations through one transmission line. CONSTITUTION:The remote control system is constituted by serially connecting a slave station group composed' of plural slave stations 21, 22...2m-1 and 2m to a master station with one transmission line 11, 12...1m-1 and 1m and connecting terminals 31, 32...3m-1 and 3m to the respective slave stations. Then, the master station 1 designates the operating slave station in the slave station group by transmitting a signal for operating slave station deisgnation, the master station 1 transmits control data and the respective operating slave stations perform processing for successively receiving and processing these control data from the first operating slave station and for transmitting them to the following operating slave stations repeatedly so that the data can be transmitted to the operating slave station in the final step. Afterwards, each operating slave station transmits response data to the master station and since the master station responds to these data, the transmission and reception of one frame is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission method for a remote control system, and more particularly to a remote control system in which a master station and a plurality of slave stations each having a terminal are cascade-connected via a single transmission line. The present invention relates to a data transmission method.

When each terminal of the remote control system is required to operate in cooperation with each other, it is possible to shorten the time for the master station to transmit control data to each operating slave station, and at the same time, for the master station and the slave station. It is required that the number of wiring between groups can be reduced as much as possible.

As a remote control system suitable for such a demand, a master station and a plurality of slave stations each having a terminal are cascade-connected by one transmission line, and the master station transmits control data to each operating slave station. The data transmission method of the remote control system has already been provided, which transmits the message and receives the response data, but in this case, the master station and all operating slave stations need to transmit and receive, and therefore the transmission frame It is not preferable because the length becomes long.

Therefore, in such a remote control system, the response data to the control data from the master station for the operating slave station is transferred as control data for the next operating slave station without returning to the master station each time. Repeat the procedure to operate each slave station sequentially, transmit to the last slave station,
By returning the response data of each slave station in the reverse direction to the master station, the control operation start time of each slave station is shortened,
There is a demand for a data transmission method of a remote control system that can reduce the wiring area required to connect each slave station from the master station.

[0005]

2. Description of the Related Art FIG. 19 shows a connection structure of a conventional system. FIG. 20 shows a frame structure in the conventional system. FIG. 21 shows an operation flow in the conventional method. The data transmission method of the conventional remote control system will be described below with reference to these drawings.

In the conventional remote control system, FIG.
As shown in FIG. 9, a plurality of slave stations 1,
, ..., m (521, 522, ..., 52m) are transmitted lines L _1, L _2, ... _, L _m (511, 512, ..., 5), respectively.
1m) is connected in parallel.
Further, each terminal 1, 2, ..., M (531, 532, ..., 53
, m (521, 522, ..., 5)
2 m) and one transmission line L _01, L _02, ..., L respectively
They are connected at _{0 m} (541, 542, ..., 54 m).

The master station (501), as shown in FIG.
First, the control data A _s1 is transmitted to the first operating slave station (step 602), and the first operating slave station processes this and transmits the response data A _r1 to the master station (501) ( Step 603). Hereinafter, such an operation is repeated from the second operating slave station to the final operating slave station (step 60).
4).

In the conventional data transmission method of the remote control system, since it is necessary for all the operating slave stations and the master station to perform transmission / reception in this way, as shown in FIG. 20, the length of one frame is long. Become.

[0009]

In the conventional data transmission method of the remote control system, the master station transmits control data to one operating slave station, and then immediately transmits the control data to the next operating slave station. Even if it is possible, there is a problem that the master station has time to receive the response data of the previous operating slave station, so that the time to start the operation of the subsequent operating slave station is delayed.

Further, since the master station and all the slave stations are connected by one transmission line for each slave station, there is a problem that the wiring area cannot be widened.

The present invention is intended to solve such a problem of the prior art, and does not immediately return the response data for the control data of one operating slave station to the next operating slave station. By making it control data to the station, while speeding up the control start time of the next operation slave station,
It is an object of the present invention to provide a data transmission method of a remote control system, which can narrow a wiring area by connecting a master station and all slave stations in cascade.

[0012]

[Means for Solving the Problems] (1) A slave station group consisting of a plurality of slave stations is cascade-connected to a master station via one transmission line, and terminals are connected to the slave stations. In the remote control system, the master station sends an operation slave station designation signal to the transmission line to specify an operation slave station in the slave station group, and the master station sends control data to the transmission line. , Each operating slave station sequentially receives control data from the first operating slave station, processes it, and transfers it to the subsequent operating slave station, and repeatedly transmits it to the operating slave station at the final stage. The slave station sends the response data to the master station,
When the master station receives this, transmission / reception of one frame ends.

(2) In the case of (1), the operating slave station at the final stage is
When control data is received, the response data of all operating slave stations are returned to the master station together.

(3) In the case of (2), when the operating slave station is designated by the master station, each operating slave station returns information indicating the presence or absence of a failure to the master station, and the master station reports the failure. A certain operating slave station is designated as a non-operating slave station, and thereafter, this is excluded and the operating slave station is designated.

(4) In the case of (2), when the final stage operating slave station returns response data to the master station, the response data including the failure information of each operating slave station is transmitted, The master station subsequently changes the designation of the operating slave station according to this failure information.

(5) In the case of (1), when the operating slave stations at the final stage receive the control data, each operating slave station returns response data to the master station, so that the response of all operating slave stations The data is transmitted to the master station, and the master station subsequently changes the designation of the working slave station according to the failure information of each working slave station included in the received response data.

(6) In the case of (1), when the operating slave station at the final stage receives the control data, it sends the response data in the reverse direction to the transmission line, and each operating slave station operates in the subsequent stage. The response data of all the slave stations is transmitted to the master station by repeating the process of receiving and processing the response data of the above and sequentially transferring it to the previous stage, and the master station also performs each operation included in the received response data. Thereafter, the designation of the operating slave station is changed according to the failure information of the slave station.

[0018]

FIG. 1 shows the basic configuration of the present invention, showing the connection configuration of a master station and a slave station in the system of the present invention. FIG. 2 shows a frame structure in the system of the present invention, where (a) is the frame structure (1) and corresponds to the first aspect of the present invention, and (b) is the frame structure (2), Corresponding to the second and fourth aspects of the present invention, (c) is a frame configuration (3) and corresponds to the third aspect of the present invention. 3 and 4 show operation flows (1-1) and (1-2) of the method of the present invention, respectively, and correspond to the case of the first embodiment of the present invention. 5 and 6 show
The operation flows (2-1) and (2-
It is a figure which shows 2), and respond | corresponds to the case of the 2nd form of this invention. 7 and 8 show operation flows (3-1) and (3-2) of the method of the present invention, respectively.
This corresponds to the case of the third mode of the present invention. 9 and 1
0 is the operation flow of the method of the present invention (4-1),
It is a figure which shows (4-2), and corresponds to the case of the 4th form of this invention. Hereinafter, the method of the present invention will be divided into the first to fourth modes and described with reference to the corresponding drawings.

The method of the present invention is shown in FIG.
Sea urchin, master station (1) and each slave station 1, 2, ..., M-1, m
(21,22, ..., 2m-1,2m) means one transmission
Track L _11,L_12,…_,L_1m-1,L_1m(11, 12, ...
1m-1, 1m) are connected in cascade. Also
Each slave station 1, 2, ..., M-1, m (21, 22, ..., 2m
-1,2 m) and terminals 1, 2, ..., M-1, m (31,
32, ..., 3m-1, 3m) are transmission lines L, respectively.
_31,L_32,…_,L_3m-1,L_3m(131, 132, ..., 1
3m-1, 13m).

In the present invention, as shown in FIG. 1, the master station (1) and the slave stations 1, 2, ..., M-1, m (2
1, 22, ..., a 2m-1, 2m) and, one transmission line L _11, L _{12 of, ..., L 1m-1,} L 1m (11,12, ..., 1m
Since -1, 1 m) are connected in cascade, the wiring area can be narrowed as compared with the case of the conventional example shown in FIG.

FIG. 1 shows one designated operation slave station i.
2 and the frame structure shown in FIG. 2, the control data S _i is received and processed, and immediately the control data S _{i + 1 is} sent to the next designated operation slave station _{i + 1.}
Therefore, the control start time of the designated operation slave station in the subsequent stage can be shortened as compared with the case of the conventional example shown in FIG.

In the first mode of the system of the present invention, FIG.
The frame configuration (1) shown in (a) is connected to the master station (1) as shown in operation flows (1-1) and (1-2) shown in FIGS. 3 and 4. The data transmission is performed as follows with the operating terminal and / or the terminal and / or the operating slave station (hereinafter simply abbreviated as “and”) is not in failure.

In FIGS. 3 and 4, first, the master station (1) is
A signal S ₀ indicating which slave station is the operating slave station is transmitted to the slave station group, that is, slave stations 1, 2, ..., M-1, m (21, 22, 22).
, 2m-1, 2m) (step 10)
0). Next, if the terminal and the slave station are out of order among the n designated slave stations, each slave station sends a signal X ₀ indicating that to the master station ( Step 101). In the frame structure shown in FIG. 2 (a), this signal transmitted from each operating slave station to the master station is B _01, B _02,
... B _0n (n ≦ m). Here, the operating slave station in which the terminal and the slave station itself are out of order is thereafter regarded as a non-operating slave station (step 101).

Next, the master station (1) operates first,
Control data S for one operation slave station ₁ To send
102). The first working slave station processes this and the second
Control data S to the slave station₂ Is transmitted (step 10)
3). From the n operating slave stations specified by the master station,
Specified operation in which the slave station itself is out of order
Assuming that the number of creator stations is p, from the second operating slave station to p-1
Up to the operating slave station, the control data is received from the operating slave station in the previous stage.
To process this and send control data to the next slave station.
(Step 104).

The final operating slave station p receives the control data S _p from the (p-1) th operating slave station, processes the control data S _p , and transmits the response data R ₀ to the master station (1) (step S1). 1
05). The response data R ₀ is received by the master station (1) without being processed by the slave station on the way. Response data R
After receiving ₀ , the master station (1) stops the data transmission / reception when it is necessary to stop the data transmission / reception, and continues the data transmission / reception when it is not necessary to stop (step 106). .

Then, when the master station changes the designation of the working slave station or checks again the working slave station in which the terminal and the slave station itself are out of order, the master station repeats the operation from step 100, Otherwise, the master station (1) is p
The data transmission / reception operation from step 102 onward is repeated with each operating slave station (step 107).

In the first embodiment of the present invention, as shown in steps 100 and 101 of the operation flow of the present invention shown in FIGS. 3 and 4, there are n operating slave stations designated by the master station. Among them, the terminal of the slave station and the slave station itself can be immediately known by the data S ₀ and X ₀ in the frame structure (1) of the present invention shown in FIG. 2A. it can.

Data R ₀ in the frame structure (1) shown in FIG. 2 (a) is response data transmitted by the final operating slave station p to the master station, and is control data of all operating slave stations. Includes response information for. Therefore, according to this response data R ₀ , the master station (1) has the response data A _r1, A _r2, ... In the frame configuration diagram of the conventional example shown in FIG.
_, Response information A _rp, can know a short time together.

In the second mode of the method of the present invention, the configuration shown in FIG.
The frame configuration (2) shown in (b) and the master station (1) are designated as shown in the operation flows (2-1) and (2-2) shown in FIGS. 5 and 6. Data transmission is performed with the operating slave station as follows.

In FIGS. 5 and 6, first, the master station (1) is
A signal S ₀ indicating which slave station is the operating slave station is transmitted to the slave station group, that is, slave stations 1, 2, ..., M-1, m (21, 22, 22).
, 2m-1, 2m) (step 20)
0).

Next, the master station (1) operates first,
Control data S for one operation slave station ₁ To send
201). The first working slave station processes this and the second
Control data S to the slave station₂ Is transmitted (step 20)
2). When p is the number of operating slave stations specified by the master station,
Of the p operating slave stations, the terminal and the slave station itself have failed.
If there is a specified operation slave station,
It is determined in step 205 and step 206.

From the second operating child station to the p-1th operating child station, the control data is received from the preceding operating child station, processed, and the control data is transmitted to the next operating child station. (Step 203). The final operating child station p receives the control data S _p from the (p−1) th operating child station, processes it, and transmits the response data R ₀ to the parent station (1) (step 2).
04).

The response data R ₀ reaches the master station (1) and is received without being processed by the slave station on the way. After receiving the response data R ₀ , the master station (1) stops transmission / reception of data when it is necessary to stop transmission / reception of data,
If it is not necessary to stop, the data transmission / reception is continued (step 205).

For example, if there is a designated operating slave station in which the terminal and the slave station itself are out of the p operating slave stations designated by the master station, the information is included in the response data R _0. By transmitting the data with the "", it is possible for the received master station to stop the transmission and reception of data.

Next, it is judged whether or not the master station changes the designation of the operating slave station (step 206). When not changing, the master station (1) repeats the operation after step 201 with p designated operation slave stations, and when changing, repeats the operation after step 200. Here, if there is a designated operating slave station in which the terminal and the slave station itself are out of order among the p operating slave stations designated by the master station, it is included in the response data R _0. The operating slave station can be changed by the information of.

In the second embodiment of the present invention, as shown in the frame structure (2) of FIG. 2B, the portion of the data X ₀ of the frame structure of the first embodiment (FIG. 2A) is deleted. It has a frame structure. Therefore, the control start time can be made shorter than in the frame configuration of the first embodiment.

Further, in the second mode, p specified by the master station
When there is a designated operating slave station in which the terminal and the slave station itself are out of the operating slave stations, the response data R ₀ contains information to that effect. (1) is
You can also know about this.

In the third mode of the method of the present invention, the configuration shown in FIG.
The frame configuration (3) shown in (c) and the master station (1) are designated as shown in the operation flows (3-1) and (3-2) shown in FIGS. 7 and 8. Data transmission is performed with the operating slave station as follows.

In FIGS. 7 and 8, first, the master station (1) is
A signal S ₀ indicating which slave station is the operating slave station is transmitted to the slave station group, that is, slave stations 1, 2, ..., M-1, m (21, 22, 22).
,, 2m-1, 2m) (step 30)
0).

Next, the master station (1) operates first,
Control data S for one operation slave station ₁ To send
301). The first working slave station processes this and the second
Control data S to the slave station₂ Is transmitted (step 30)
2). When p is the number of operating slave stations specified by the master station,
Of the p operating slave stations, the terminal and the slave station itself have failed.
If there is a specified operation slave station,
At step 307, the determination is made at step 306.

From the second operating child station to the p-1th operating child station, the control data is received from the preceding operating child station, processed, and the control data is transmitted to the next operating child station. (Step 303). The final operating child station p receives the control data S _p from the (p-1) th operating child station (step 304).

After that, the master station (1) sends response data X _r consisting of B _r1, B _r2, ... _, B _rp transmitted from each operating slave station.
Is received (step 305). After receiving the response data X _r , the master station (1) stops the data transmission / reception when it is necessary to stop the data transmission / reception, and continues the data transmission / reception when it is not necessary to stop ( Step 30
6).

For example, if there is the i-th designated operating slave station in which the terminal and the slave station itself are out of the p operating slave stations designated by the master station, the response data X _r It is possible to cause the received master station to stop the transmission and reception of data by transmitting the bit B _ri of the above with the information.

Next, whether the master station changes the designation of the operating slave station
It is determined whether or not (step 307). If you do not change
, The master station (1) performs p operations after step 301.
To change repeatedly with the specified operation slave station,
The operation after step 300 is repeated. Here, the master station
Of the p operating slave stations that are set, the terminal and the slave station itself
If there is a malfunctioning designated slave station i, the response data
X_rBit B in _riAccording to the information that
The operating slave station can be changed.

In the third mode of the present invention, as shown in the frame structure (3) of FIG. 2C, the data X ₀ part of the frame structure of the first mode (FIG. 2A) is deleted. It has a frame structure. Therefore, the control start time can be made shorter than in the frame configuration of the first embodiment.

Further, in the third mode, as shown in the data X _r of the frame structure (3) shown in FIG. 2C, the master station (1) is transmitted from each designated operation slave station, and B _r1, B
_{Since the} response data X _r consisting of _r2, ... _, B _rp is received,
The master station (1) can classify the response of each designated operation slave station with a simple circuit.

In the fourth mode of the method of the present invention, FIG.
The frame configuration (3) shown in (b) and FIGS.
As shown in the operation flows (4-1) and (4-2) shown in (1), the master station (1) and the designated operation slave station perform data transmission as follows. In the fourth mode, as compared with the second mode, steps 404 to 408 in FIGS. 9 and 10 are performed.
Are different.

In step 404 of FIGS. 9 and 10,
The final operating child station p receives the control data S _p from the p−1th operating child station, processes the control data S _p , and transmits the response data R _p to the p−1th operating child station.

Contrary to the control data transmission order, each operating child station from the (p-1) th operating child station to the second operating child station receives and processes the response data from the operating child station in the subsequent stage, The response data is transmitted to the former mobile station (step 405). Then, the first operating slave station transmits response data R ₀ to the master station (step 406).

After receiving the response data R ₀ , the master station (1)
If the data transmission / reception needs to be stopped, the data transmission / reception is stopped, and if the data transmission / reception does not need to be stopped, the data transmission / reception is continued (step 407).

For example, if there is a designated operating slave station in which the terminal and the slave station itself are out of p operating slave stations designated by the master station, the designated operating child is included in the response data R _0. By incorporating the failure information for each station, the receiving master station can stop transmitting and receiving data.

Next, it is determined whether the master station changes the designation of the operating slave station (step 408). If it is not changed, the master station (1) repeats the operation after step 401 with the p designated operation slave stations, and if it is changed, repeats the operation after step 400. Here, if there is a designated operating slave station in which the terminal and the slave station itself are out of p operating slave stations designated by the master station, for each designated operating slave station in the response data R ₀ The operating slave station can be changed by the failure information incorporated in.

In the fourth mode of the present invention, the frame structure (2) of FIG. 2B and the operation flow (4-) of FIGS.
As shown in 1) and (4-2), the master station (1) and the designated operating slave station perform data transmission. This form is different from the second form in step 404 in FIGS. 9 and 10.
~ 408 are different. That is, in the fourth mode,
The response data R _p transmitted from the final operating slave station p toward the master station (1) incorporates the response information for each slave station in each designated operating slave station, and the master station (1) generates the response data R ₀ as the response data R _0. Be received.

Therefore, according to the fourth mode, the latest and large amount of response information can be obtained for each designated operating slave station as compared with the second mode.

[0055]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 11 shows a configuration example (1) of a slave station in the system of the present invention, which is applied to the first to third embodiments of the present invention. FIG. 12 shows a configuration example (2) of the slave station in the system of the present invention, which is applied to the case of the fourth mode of the present invention. FIG. 13 shows a configuration example of the operation slave station detection circuit of the slave station i. FIG. 14 shows an operation time chart of the operation slave station detection circuit of the slave station i. Figure 15 shows
The structural example of the processing circuit 1 of the slave station i is shown. FIG. 16 shows a slave station i
3 shows an operation time chart of the processing circuit 1 of FIG. Figure 17
The structural example of the processing circuit 2 of the slave station i is shown. FIG. 18 shows a slave station i.
7 shows an operation time chart of the processing circuit 2 of FIG. In addition, in each figure, the diagonal line attached to the connecting line indicates that it is a double line.

In the first embodiment of the system of the present invention, in the configuration example (1) of the slave station shown in FIG. 11, the contact of the line switching circuit (40) is connected to the b side in the initial state. In the frame structure (1) shown in FIG. 2A, the signal S ₀ transmitted from the master station (1) and indicating the operating slave station is operated through the contacts a and b of the line switching circuit (40). It is input to the slave station detection circuit (42).

In the operating slave station detection circuit (42), the signal S₀ 
Is input, it is output from the mode setting circuit (41).
In addition, a mode signal indicating what mode the slave station is in
Issue M _dBy comparing with this slave station,
Determine if it is a station. And this slave station is designated
If it is a slave station, the connection terminal and slave station itself
Signal X shown in Fig. 2 (a).₀ of
Bit B_0iSignal d corresponding to_uIs output. Signal d_uIs
After the three-state buffer (44), the master station (1)
Sent. This kind of operation is applied to all specified operation slave stations.
Signal X shown in FIG.
₀ Is formed.

Signal Y shown in FIG. 2 (a)₀ Is each specified action
Control data S received by the slave station_1,S _2,…, S_p-1,S_pOr
11, the designated operation slave station in the configuration of FIG.
control data S received in i_iIs the line switching circuit (4
0) is input to the processing circuit 1 (43) via contacts a and c.
Be done. At this time, the contacts of the line switching circuit (40) are connected.
If the following terminal and slave station itself are not defective, operation
By the signal dv output from the slave station detection circuit (42)
The b side is switched to the c side.

The processing circuit 1 (43) controls the control data S
_i is processed together with the data input from the connection terminal to obtain the control data S _{i + 1} for the next designated operation slave station,
Output through the three-state buffer (45). Here, when this slave station is the final operating slave station p, the output data is the response data R ₀ shown in FIG.

When the processing circuit 1 (43) wants to receive the signal S ₀ again at the beginning of the next one frame, it outputs the signal d _jo to switch the contact of the line switching circuit (40) to the b side. , Makes the three-state buffer (44) conductive.

On the other hand, the processing circuit 1 (43) receives the data from the connection terminal and outputs the signal G _ci indicating whether or not the connection terminal is out of order to the operating slave station detection circuit (42). Also do.

In the first mode of the method of the present invention, when the connection terminal and the slave station itself are out of order, the signal Y ₀ shown in FIG. 2 (a) is not input to the slave station internal circuit. The signal is output from the master station side to the slave station side via the contacts a and b of the line switching circuit (40). The response data R _{0 is} also output to the master station side from the slave station side through the contacts b and a of the line switching circuit (40) without being input to the slave station internal circuit.

When the slave station of the method of the present invention shown in FIG. 11 is an inactive slave station, the active slave station detection circuit (42) determines that this slave station is a non-active slave station. By controlling the line switching circuit (40) by means of the circuit, the signal is transmitted / received directly through the contacts a and b without being input to the slave station internal circuit.

In the second mode of the system of the present invention, in the configuration example (1) of the slave station shown in FIG. 11, the signal d _u is not output from the operating slave station detection circuit (42).

In the third mode of the system of the present invention, the signal d _u is not output from the operating slave station detection circuit (42) in the slave station configuration example (1) shown in FIG.

In the third mode of the system of the present invention, the processing circuit 1 (43) shown in FIG. 11 processes the control data S _i together with the data input from the connection terminal to specify the next designated operator. The control data S _{i + 1} for the station is output via the three-state buffer (45). Furthermore, the processing circuit 1
(43) processes the data input from the connection terminal thereafter and outputs it as the bit B _ri in the response data X _r to the master station (1) shown in FIG. 2 (c). If the connection terminal and the slave station itself are out of order, bit B
The information is output to _ri .

A fourth form of the method of the present invention is shown in FIG.
2 is used for the frame configuration using the configuration example (2) of the slave station that has been selected.
(B). In FIG. 12, the signal S of FIG.₀ 
And Y ₀ The operation regarding is the same as the operation in the case of FIG.
It is the same.

In FIG. 12, when the transmission of the signal Y ₀ shown in FIG. 2B is completed, the processing circuit 1 (53)
The signal d _jo is sent to the line switching circuit (50), and the contact point d
Side to contact b side. Here, the response data R _{i + 1} transmitted from the operating child station in the latter stage toward the parent station (1) is
If the connection terminal and the slave station themselves are processed by the processing circuit 2 (57) and the failure occurs at that time, the response data R
Incorporating failure information into _{i + 1} itself, the response data R _i
, And is transmitted in the direction of the master station (1). The signal A _d in FIG. 12 is the failure detection signal of the slave station itself, and the signal d _mo is the failure detection signal of the connection terminal.

After the response data R _i is transmitted from the processing circuit 2 (57) shown in FIG. 12, the processing circuit 2 (57) is sent.
A line switching circuit (50) according to the output signal d _z from
Contact is switched to the c side.

The configuration example (2) of the slave station shown in FIG. 12 can be applied to the first to third aspects of the present invention.

A configuration example of the operating slave station detecting circuit of the slave station i shown in FIG. 13 and a time chart of the operating slave station detecting circuit of the slave station i shown in FIG. 14 are shown in FIG. 1 shows an operation slave station detection circuit (42) in the slave station configuration example (1);
It is applied to the operation slave station detection circuit (52) of the slave station configuration example (2) shown in FIG.

In the following, according to the first embodiment of the present invention and the configuration example of the slave station shown in FIG. 11, the configuration example of the operation slave station detection circuit of the slave station i shown in FIG. 13 and FIG. The operation time chart of the operation of the slave station i shown in FIG.

Frame configuration (1) shown in FIG. 2 (a)
, The signal S ₀ indicating the operating slave station transmitted from the master station (1) in FIG.
0) is input as the signal G _i . Now the signal S ₀ is
Assuming that there are 4 bits as shown in FIG. 14, from the output terminal Q _{4 of the} shift register SR1 (60) to S of FIG.
_R1. Outputted as Q _4. Shift register SR1
An output signal of (60) and a signal G _ci indicating whether or not the connection terminal output from the processing circuit 1 (43) is out of order,
The failure detection signal A _d of the slave station itself output from the failure detection circuit (46) of the slave station and the mode signal M _d output from the mode setting circuit (41) are the NAND circuit (including the NAND circuit ( 61) is input.

The NAND circuit (61) determines whether or not this slave station is the designated operation slave station, and when this slave station is the designated operation slave station, the connection terminal and the slave station itself have not failed. whether the examined a specified operation slave station, when not defective, and outputs the bit B _oi the output signal G _u. Figure 1
In 4, the bit B _oi consists of 1 bit.
The bit B _oi constitutes the data X _o shown in FIG. In FIG. 14, CK1 is a clock signal.

The output signal G _u of the NAND circuit (61) is
It is input to the shift register SR2 (63) and is input as shown in FIG.
Is shifted so that the proper position of the data X _O in, from the selection circuit composed of NAND circuits (64), is output as the signal d _u as a single bit B _oi data X _o, in FIG. 11 Three-state buffer (44)
Entered in.

On the other hand, the signal d _u is input to the delay circuit 65, and when the connection terminal and the slave station are not in failure,
A signal d _v for switching the contact of the line switching circuit (40) from the b side to the c side is output.

By the way, in FIG. 14, the signal CK
_u is a clock signal for extracting the signal d _u in the selection circuit (64). In addition, the signal d _{u in} FIG.
This is a signal on the time chart when the slave station i is i = 1, that is, the first designated operation slave station.

The configuration example of the processing circuit 1 of the slave station i shown in FIG. 15 and the operation time chart of the processing circuit 1 of the slave station i shown in FIG. 16 are the processing circuit 1 (shown in FIG. 43)
Can be applied to the processing circuit 1 (53) shown in FIG. However, when applied to the processing circuit 1 (43), the wiring for the signal d _mo in FIG. 15 is removed.

The configuration and operation of the processing circuit 1 of the slave station i will be described below with reference to FIGS. 15 and 16 according to the first embodiment of the present invention and the configuration example of the slave station shown in FIG.

The control data S _i received by the operating slave station i shown in the frame structure (1) of FIG.
The signal C _i is input to the shift register SR3 (70) shown in FIG. Now, as shown in FIG. 16, the signal S
_{If i} is 4 bits, the shift register SR3
From the output terminal Q ₄ of (70) to SR3. It is output like Q ₄ . The output signal of the shift register SR3 (70), the failure detection signal A _d of the child station itself output from the failure detection circuit (46) of the child station itself, the connection interface i to the terminal interface circuit (72) and the output register (73). a signal d _i which) through the output, the mode signal M _d output from the mode setting circuit (41), are input to the NAND circuit (75) comprising a NAND circuit.

The NAND circuit (75) controls the control data S _i.
The response data S _{i + 1} is output as an output signal C _ri via the shift register SR4 (76) and is transmitted to the three-state buffer (45). Here, the response data S _{i + 1} output from the NAND circuit (75) is the output terminal Q of the shift register SR4 (76).
₄ to SR4. It is output like Q ₄ . The signal E _i in FIGS. 15 and 16 is a load signal for this purpose.

In addition to this, the NAND circuit (75)
Signal S again at the beginning of one motion frame ₀ If you want to receive
The contact of the line switching circuit (40) from the c side to the b side.
Change the three-state buffer (44) to the conductive state.
Signal d_joIs output via the delay circuit (77) and the control signal is output.
Data S_iSignal d for instructing the terminal by_koEnter
It outputs to the register (74).

The output register (7
3) is a signal G indicating whether or not the connected terminal is out of order.
_{The ci} is output to the operating slave station detection circuit (42). Further, in the fourth embodiment of the present invention, the processing circuit 2 (5
When the configuration of 7) is used, the signal d _mo indicating whether or not the connected terminal is out of order is also output. Fourth method of the present invention
When the signal G _ci and the signal d _mo are used in the above form, the two signals have different failure detection signal generation times.

Shift register SR4 shown in FIG.
The output signal G _ri of (76) indicates that this slave station is the last operating slave station p.
, The response data R ₀ is not the control data S _{i + 1} but the response data R _p in the first and second modes of the present invention, and the response data R _{p in} the fourth mode. , Third
In the case of the above form, it becomes the bit B _rp of the data X _r shown in FIG.

In the third mode of the system of the present invention, the slave stations other than the final operation slave station p are output as the output signal C _ri of the shift register SR4 (76) in addition to the control data S _{i + 1} .
Bits B _r1 , B _r2 , ... _{, Of} the data X _r shown in (c)
Output B _rp-1 .

The configuration example of the processing circuit 2 of the slave station i shown in FIG. 17 and the operation time chart of the processing circuit 2 of the slave station i shown in FIG. 18 are the same as those in the system of the present invention shown in FIG. It can be applied to the processing circuit 2 (57) in the configuration example (2) of the slave station.

The configurations of FIGS. 17 and 18 can also be applied to the case of the fourth embodiment of the present invention. From the operation slave station in the latter stage,
The response data R _{i + 1} , which is the data at the position of the time slot R ₀ in the frame structure (2) of FIG. 2B, transmitted in the direction of the master station (1) is composed of a NAND circuit as the signal d _x. input to the NAND circuit (81), and the failure detection signal a _d of the slave station itself, the failure detection signal d _mo connection terminal
Are processed by the signal d _m passed through the flip-flop circuit (80) and output as response data R _i indicated by the signal d _y . In addition, in FIG. 17, * CK1 is CK1
Shows the inverted signal of.

Therefore, the response data R _i can include information indicating whether or not the connection terminal and the slave station itself are out of order at that time. It is also possible to incorporate the state of the connection terminal into the signal d _mo and include that information in the response data R _i .

NAND circuit (81) shown in FIG.
Transmits the response data R _i indicated by the signal d _y , and then outputs the signal d _z via the delay circuit (82) in order to switch the contact of the line switching circuit (50) from the b side to the c side.

FIG. 18 shows the response data R_{i + 1,}R_iA bit of
When the number is 4, the operation of FIG. 17 is shown as a time chart.
It was done. Where the signal d_moIs the signal B_v1,B
_v2,B _v3,B_v4Consists of 4 wires to send
It

[0091]

As described above, according to the present invention, in the data transmission system of the remote control system, the master station and the plurality of slave stations are connected in cascade by one transmission line, which is different from the conventional system. By comparison, the wiring area can be narrowed.

Also, in one designated operation slave station i, after receiving the control data S _i , the control data S _i is processed and immediately sent to the next designated operation slave station _{i + 1} without sending back to the master station. Therefore, as compared with the conventional method, the control start time of the designated operation slave station in the subsequent stage can be shortened.

In the first mode of the method of the present invention, one frame of data S ₀ is used to determine which of the n operating slave stations designated by the master station is the terminal of the slave station and the slave station itself. And X ₀ , it is possible to know immediately.

The data R _{0 of} one frame is response data transmitted by the final operating child station p to the parent station, and includes response information for control data of all operating child stations. Therefore, according to this response data R ₀ , the master station has the response data A _r1, A _r2, ... _, A _rp returned from each slave station at each transmission of the master station in the case of the conventional frame structure. Response information can be collectively known in a short time.

In the second mode of the system of the present invention, the first mode
Data X of frame structure in ₀ Removed
It has a frame structure. Therefore, in the case of the first form
The control start time can be made faster than the frame configuration of
it can.

Further, in the second mode, p specified by the master station is set.
If there is a designated operating slave station in which the terminal and the slave station itself are out of order among the individual operating slave stations, the information is included in the response data R _0. Can also know.

The third mode of the system of the present invention has a frame structure in which the portion of the data X ₀ is removed from the frame structure of the first mode. Therefore, the control start time can be shortened as compared with the frame configuration of the first embodiment.

Further, since the master station receives the response data X _r composed of the bits B _r1, B _r2, ... _, B _rp transmitted from each operating slave station, the master station can easily respond to each operating slave station. It can be divided by various circuits.

In the fourth mode of the system of the present invention, the response data R _p transmitted from the final operating slave station p toward the master station is created by incorporating the response information for each slave station in each designated operating slave station. The data are collectively received by the station as the response data R ₀ . Therefore, the master station can obtain the latest and larger amount of response information about each designated operation slave station than in the case of the second mode.

[Brief description of drawings]

FIG. 1 is a diagram showing a principle configuration of the present invention.

FIG. 2 shows a frame structure in the system of the present invention,
(A) shows the frame configuration (1), (b) shows the frame configuration (2), and (c) shows the frame configuration (3), respectively.

FIG. 3 is a diagram showing an operation flow (1-1) of the method of the present invention.

FIG. 4 is a diagram showing an operation flow (1-2) of the method of the present invention.

FIG. 5 is a diagram showing an operation flow (2-1) of the method of the present invention.

FIG. 6 is a diagram showing an operation flow (2-2) of the method of the present invention.

FIG. 7 is a diagram showing an operation flow (3-1) of the method of the present invention.

FIG. 8 is a diagram showing an operation flow (3-2) of the method of the present invention.

FIG. 9 is a diagram showing an operation flow (4-1) of the method of the present invention.

FIG. 10 is a diagram showing an operation flow (4-2) of the method of the present invention.

FIG. 11 is a diagram showing a configuration example (1) of a slave station in the system of the present invention.

FIG. 12 is a diagram showing a configuration example (2) of a slave station in the system of the present invention.

FIG. 13 is a diagram showing a configuration example of an operation slave station detection circuit of a slave station i.

FIG. 14 is a diagram showing an operation time chart of an operation child station detection circuit of a child station i.

FIG. 15 is a diagram showing a configuration example of a processing circuit 1 of a slave station i.

16 is a diagram showing an operation time chart of the processing circuit 1 of the slave station i. FIG.

FIG. 17 is a diagram showing a configuration example of a processing circuit 2 of a child station i.

FIG. 18 is a diagram showing an operation time chart of the processing circuit 2 of the slave station i.

FIG. 19 is a diagram showing a connection configuration of a system of a conventional example.

FIG. 20 is a diagram showing a frame structure in a method of a conventional example.

FIG. 21 is a diagram showing an operation flow in the method of the conventional example.

[Explanation of symbols]

 1 master station 11, 12, ..., 1m-1, 1m Transmission line 21,22, ..., 2m-1, 2m Slave station 31, 32, ..., 3m-1, 3m Terminal

Claims (6)

[Claims] 1. A plurality of slave stations (2) with respect to a master station (1).
, 22, 2m-1, 2m) are connected in cascade via one transmission line (11, 12, ..., 1m-1, 1m), and each of the slave stations (21 , 22, ...
2m-1, 2m) to terminals (31, 32, ..., 3)
(m-1, 3m), the master station (1) sends a working slave station designation signal to the transmission line to designate a working slave station in the slave station group. , The master station (1) sends the control data to the transmission line so that each operating slave station sequentially receives the control data from the first operating slave station, processes the control data, and transfers it to the subsequent operating slave station. Repeat the process and transmit to the final stage operation slave station, then each operation slave station sends response data to the master station,
A data transmission method for a remote control system, wherein transmission and reception of one frame is completed when the master station receives this. 2. The data transmission method of the remote control system according to claim 1, wherein when the final stage operation slave station receives control data, response data of all operation slave stations are collected together to form a master station (1). A data transmission method of a remote control system, which is characterized in that the data is sent back to. 3. The data transmission method of the remote control system according to claim 2, wherein when a master station (1) designates an operating slave station, each operating slave station provides information indicating whether or not there is a failure. The remote control system is characterized in that the master station (1) returns to the station (1), and the master station (1) designates the operating slave station by excluding the defective operating slave station as a non-operating slave station. Data transmission method. 4. The data transmission method of the remote control system according to claim 2, wherein when the last-stage operation slave station returns response data to the master station (1), each operation is included in the response data. Transmit the information including the failure information of the slave station to the master station (1)
Is a data transmission method for a remote control system, wherein the designation of the operating slave station is changed thereafter according to the failure information. 5. The data transmission method of the remote control system according to claim 1, wherein when the final operating slave station receives control data, each operating slave station sends response data to the master station (1). By returning, the response data of all operating slave stations is transmitted to the master station (1), and the master station (1)
However, according to the failure information of each operating slave station included in the received response data, the designation of the operating slave station is changed thereafter, the data transmission method of the remote control system. 6. The data transmission method of the remote control system according to claim 1, wherein when the final operation child station receives control data, response data is sent to the transmission line in a reverse direction, and each operation element is transmitted. The station sequentially receives and processes the response data of the operating slave stations in the subsequent stage and transfers the response data to the preceding stage, thereby transmitting the response data of all the operating slave stations to the master station (1) and (1) The data transmission method of the remote control system, wherein the designation of the operating slave station is changed thereafter according to the failure information of each operating slave station included in the received response data.