JPH05284571A - Transmission system for monitor controller - Google Patents

Abstract

PURPOSE:To provide a transmission system for a general-purpose monitor controller by performing the transfer of the monitor control information with use of the text type data. CONSTITUTION:A central device B sequentially transmits the transmission signals of a single frame F and performs the transfer of the monitor control information to a terminal equipment C. The frame F consists of a transmission band F1 and a reply band F5. The band F1 consists of a start pulse Ds, an address pulse Da, and a control pulse Dc. Meanwhile the band F5 consists of a reply waiting pulse Dp. In such a constitution, the device B can perform the monitor control by transmitting the same text sentence regardless of the types of terminal equipments so as to reduce the internal processing burden and also to secure the general-purpose properties that can simply fetch the terminal equipment of a new type. Furthermore the device B can discriminate a text sentence even if a measurement value point, a start-stop state monitor point, etc., are mixed together in a single terminal equipment. Thus it is possible to attain a transmission system for a monitor controller with which the break of data can be easily recognized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centralized supervisory control of a device connected to each terminal unit through a plurality of various terminal units connected to a transmission line from a central unit by sequential time division multiplex transmission. The present invention relates to the improvement of the transmission method of the monitoring control device.

[0002]

2. Description of the Related Art FIG. 8 is a system diagram showing an outline of an air conditioning monitoring control device. FIG. 9 is an explanatory diagram of a format of data transmission / reception in one frame of a transmission signal sequentially transmitted to a transmission line by a central device of a conventional supervisory control device, and FIG. 9 (A) shows a transmission signal of the central device. 9 (B) shows a reply signal from the terminal device. FIG. 10 is an explanatory diagram showing an example of the meaning of the control pulse of the central unit of the conventional supervisory control apparatus.
FIG. 11 is an explanatory diagram showing another example of the meaning of the control pulse of the central unit of the conventional supervisory control apparatus. FIG. 12 is an explanatory diagram showing a case where the central device of the conventional monitoring control device reads the measured value from the terminal device.

As shown in FIG. 9, the air conditioning monitoring control device is
The monitor / control panel A, the central device B, various terminals C, and the transmission line L are included. The central unit B and various terminals C are connected by a two-wire transmission line L ₁ drawn from the central unit B. Further, the supervisory control board A and the central unit B are connected by a communication bus cable L ₀ of the RS485 interface standard drawn from the central unit B.

The central unit B issues a start / stop control command for the air conditioner or the like and a temperature setting command to the various terminal units C via the transmission line L ₁ , and the start / stop of the air conditioner or the like from each terminal unit C. -It takes in monitoring signals such as failures and measured values such as temperature and humidity.

[0005] Various terminals C are for turning on the non-voltage output contact.
For digital output that turns on and off the air conditioner directly when it is off, for analog output that directly sets temperature and humidity of the air conditioner using an electrical analog output, non-voltage output For digital input that directly receives contact on / off to monitor the start / stop / failure status of air conditioners, etc., and receives the on / off signal of the non-voltage output contact directly from the watt hour meter etc. There are various types such as a pulse input for counting electric power and the like, an analog input for directly receiving an electrical analog output and monitoring a measured value of a temperature / humidity sensor and the like. Further, each terminal device C is set so that a unique address can be set.

Next, the above-mentioned central device B and various terminal devices C
How to transmit and receive data by time division multiplex transmission via the transmission line L ₁ will be described with reference to FIG. As shown in FIG. 9, one frame F of the transmission signal is a unit in which the central device B exchanges data once with the terminal device C specified by the address. One frame F of a transmission signal is roughly composed of a transmission band F ₁ and a reply band F ₂ . The transmission band F ₁ includes one start pulse D _s for synchronizing the terminal C and an address pulse D for specifying the terminal C.
_a and a control pulse D _c for giving a specific instruction to the terminal C having the same address. The reply band F ₂ is composed of one reply waiting pulse D _{P having} a relatively long width for sending the reply pulse D _r to the central unit B by the terminal C which has received the control pulse D _c with the same address. Has been done. The control pulse D _c corresponds to a start / stop command, a temperature / humidity setting command, and the like.
The reply pulse D _r corresponds to an on / off state, a failure state, a measured value, and the like.

By the way, as shown in FIG. 10 and FIG.
In addition, in the transmission system of the conventional supervisory control device,
Control pulse D in the arm F_cAnd reply pulse D_rTonoso
The number of bits for each is a few, and the amount of information is small.
Yes. Therefore, the control pulse D_cFor each bit unit of
Reply pulse D_rEach bit unit of each terminal
Different meanings were given to the different types of container C. That is,
As shown in FIG. 10, in a certain type of terminal device C, control
Pulse D_c0, ... D_c7For starting and stopping equipment such as air conditioners
Non-voltage output contact R_0,… R₇It corresponds to each. So
And control pulse D_c0If is standing, non-voltage output contact R
₀Turns on. In addition, the control pulse D_c3,D_c4Is standing
If there is no voltage output contact R_3,R_FourTurns on. That is, control
Pulse D _c0, ... D_c7Wireless with bit position of ON / OFF
Pressure output contact R_0,… R₇Position of the
Nothing determines the on / off state.

Further, in a terminal C of a certain type, FIG.
As shown in FIG. 5, although the control pulses D _c0 , ... D _c7 D _C0, D _C1 correspond to the non-voltage output contacts R _0, R ₁ for starting and stopping the device, only the control pulse D _C0 is turned on. If so, the non-voltage output contact R ₀ is turned on. And the non-voltage output contact R
To turn on ₁ , control pulses D _{C0 and} D _C1 must be set up.

In addition, in the transmission system of the conventional supervisory control device,
For a reason similar to the above, a large amount of information is needed.
When the central device B reads the measured value from the terminal device C,
I was going to the sea. That is, as shown in FIG.
Pulse D_c0, ... D_c7Indicate each digit, each digit
It is used as an index. That is, control
Pulse D_c0, ... D_c7Of D_c0Terminal C can only stand
To the 4th digit information request to D_c1Stand alone
Teru made a request for information in the third digit. _c2Only
The fact that standing up demanded the information of the second digit, D_c3only
Arranged to make a first digit information request
Has been.

[0010] Therefore, when the central unit B reads a 4-digit measurement value from the terminal device C, as shown in FIG. 12, the central device B control pulse D _c0, ... upright only D _c0 of D _c7 The first one frame F is transmitted. Then, the terminal device C
Is to set D _r0, D _r3 of reply pulse D _r0, ... D _r7 and set to "9".
To reply. The central unit B then controls the control pulses D _c0 , ... D.
Only D _{c1 of c7} is set and the second 1-frame F is transmitted. Then, the terminal device C _causes the return pulse D _r0, ...
_{Set r0,} D _r1, D _r2 and send back "7". The central device B does not receive the terminal device C until such data exchange is performed four times.
From this, for example, the measured value of [9765] can be read.

[0011]

SUMMARY OF THE INVENTION As described above, conventional supervision is required.
In the transmission method of the visual control device, the bit position and its
Bits that correspond to the monitoring control information depending on whether or not
Made up of type data. Therefore, the central device B is the terminal device C.
Meaning of bit position and meaning of presence / absence of that bit for each type of
And must be aware. Also, new terminals
Each time C is developed, the bit of the terminal C is added to the central device B.
To recognize the meaning of the position and the meaning of the presence or absence of that bit
Must be added to the processing program. Furthermore,
The central device B is used when reading the measured value from the terminal device C.
Even if the numerical value is the reply pulse D_r0,... D _r7Even if received as
Since it is just a sequence of numbers, you can determine where the break is.
There was a problem that it was difficult to determine.

The present invention has been made to solve the above problems, and its purpose is to recognize the meaning of a bit position and the meaning of the presence or absence of the bit for each type of terminal device. It is not necessary to do this, it is easy to import a new terminal device, and does not require a complicated processing program that makes the central device and the terminal device recognize the meaning of the bit position and the meaning of the presence or absence of the bit. The object of the present invention is to provide a transmission system of a supervisory control device having the property.

[0013]

In order to solve the above problems, the present invention designates a terminal device as a one-frame format from the central device to a plurality of various terminal devices connected to a transmission path from the central device. And a device connected to each terminal by sequentially transmitting a transmission signal including a transmission band including address data and control data for control and a reply band for reply data from the terminal. In the transmission system of the supervisory control device for sequentially performing centralized supervisory control by time division multiplex transmission via each terminal device, the control data and the reply data are text-type data respectively.

[0014]

With the above configuration, the text type data has a meaning as a sentence unlike the bit type data, so that the central device can send a text sentence to each terminal device regardless of the type of each terminal device. By issuing (sending),
The trowel can freely monitor and control various terminals.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the transmission system of the supervisory control device according to the present invention will be described in detail below with reference to FIGS. FIG. 1 is a system diagram showing a state in which a central device of a supervisory control device and various terminal devices are connected by a transmission line. FIG. 2 is an explanatory view showing a format of data transmission / reception in one frame of a transmission signal sequentially transmitted to the transmission path by the central device.
2A shows a transmission signal from the central device, and FIG. 2B shows a reply signal from the terminal device. FIG. 3 is an explanatory diagram showing an example of the meaning of the control pulse of the central unit. FIG. 4 is an explanatory diagram showing how to handle data of a multipoint type terminal device using text type data. FIG. 5 is an explanatory diagram showing how the central device exchanges data with the terminal device in one frame of a transmission signal. FIG. 6 is an explanatory diagram showing the operation of the terminal device. Figure 7
FIG. 7 is an explanatory diagram showing how to handle data of the composite type terminal device using text type data. The transmission line L ₁ is a two-wire type transmission line as in the conventional case.

The central unit B shown in FIG. 1 sequentially transmits the transmission signals of one frame F as shown in FIG.
The supervisory control information is transmitted and received to and from, and the format of one frame F of the transmission signal is configured as follows. That is, one frame F of the transmission signal is largely composed of the transmission band F ₁ and the reply band F ₂ . Transmission band F
₁ is one start pulse D for synchronizing the terminal device C
_s and the address pulse D for specifying the terminal C
_a and a control pulse D _c for giving a specific instruction to the terminal C having the same address. The reply band F ₂ is composed of one reply waiting pulse D _{P having} a relatively long width for sending the reply pulse D _r to the central unit B by the terminal C which has received the control pulse D _c with the same address. Has been done. The control pulse D _c corresponds to a start / stop command, a temperature / humidity setting command, and the like.
The reply pulse D _r corresponds to an on / off state, a failure state, a measured value, and the like.

As is apparent from FIG.
The format of Lame F is different from the conventional format
Has the following configuration. That is, the control pulse D_c1 bar
Byte counter data D, which is the message length code_cbWhen
Control data D that is a control message _ccIt consists of
And reply pulse D_rIs a 1-byte message length code
Byte counter data D_rbAnd monitoring data that is a monitoring message
D_rcIt is composed of and. That is, a bite count
Data D_cbByte counter data D_cb
Control data D that follows_ccMessage length from 1 byte to 25
It can be changed up to 6 bytes. Also, buy
Counter data D_rbByte counter
Data D_rbData D following_rc1 telegram length of
To 256 bytes can be changed. Servant
Therefore, a large amount of control data can be obtained in one communication (one frame F)
D_ccAnd monitoring data D_rcCan handle
It Byte counter data D_rbWaiting for a reply
Pulse D_PThe width of is designed to be variable.

Therefore, the central device B sends the information amount from the terminal device C.
If you need to read a measurement that requires a lot of
This is performed as shown in FIG. That is, for example, control data
TA D _ccIs [00001111]_bitIs 4 digits
4 bytes of measured values, one byte at a time starting from the upper digit
If it is an instruction to reply as
Is monitoring data D_rcAs [00001001]_bit→
[00000111]_{bi t}→ [00000110]_bit
→ [00000101]_bitReply Then the center
Since device B recognizes it as a measured value of "9765",
is there.

Next, the text type data will be described.
For example, start / stop of equipment is turned on / off directly with a non-voltage output contact.
One terminal for digital output to switch
Equipped with multiple non-voltage output contacts (points) even in C
There is a multi-point type terminal device C. Such a multi-port
Even in the case of the terminal type terminal C, the text is shown in FIG.
By adding a point sentence P like
It is possible to enable the handling of the data of the input. sand
That is, for example, as shown in FIG. _ccThe text
If the strike sentence is [C01ON], the meaning of this text sentence
The taste is address pulse D_aTerminal with an address that matches
[Point 1 "01" non-voltage output connection to C
Do not make a control output "C" that turns on the point.
It is a command that means Then, as shown in FIG.
The text interpretation unit T in the terminal device C
Control to turn on the "01" non-voltage output contact
It is a command that means "Please output" C ""
Interpret the point, the first voltageless output contact R₁The
It does.

Further, as shown in FIG. 5, for example, one for digital input for directly receiving ON / OFF of non-voltage output contacts at a plurality of points to monitor the start / stop / failure state of an air conditioner or the like. [B terminal device C is, as the monitoring data D _rc
02ALM] is transmitted, the terminal device C has returned to the central device B data indicating that [the second point "02" non-voltage input contact is in the fault state "ALM"]. Of.

Further, in transmitting and receiving a signal by the text type data as described above, one terminal unit is provided with both monitoring points for starting and stopping and measurement value points such as temperature and humidity. However, as shown in FIG. 7, if the central device B transmits [A01 / D01] as the control data D _cc , the central device B sends [Terminal 1 "01"] to the terminal device C. The measured values "A" and "/", and the start / stop monitoring state "D" of the first point "01" are returned.]. Then, as shown in FIG. 7, a terminal device C in which one terminal device has both start and stop monitoring points and measurement value points such as temperature and humidity is shown in FIG.
As monitoring data D _rc [A019765 / D01ON]
Suppose that the terminal device C responds to the central device B [the value of the first point "01" of the measured value "A" is 976
It is 5 "9765". "/", Start / stop monitoring status "D"
The monitoring state of the first point "01" is ON "ON"]. In other words, the text sentence can be separated by "/".

[0022]

As described above, the transmission system of the supervisory control device of the present invention is configured so that the supervisory control information is transmitted and received by the text-type data.
It is possible to monitor and control by issuing (transmitting) the same text sentence regardless of the type of terminal device, which reduces the internal processing load and is versatile so that a new type of terminal device can be easily incorporated. Even if there are measurement value points and start / stop status monitoring points coexisting in one terminal device, there is a division as a text sentence, so it is possible to provide a transmission system of a monitoring control device in which data breaks are easy to see. Has the effect.

[Brief description of drawings]

FIG. 1 is a system diagram showing a state in which a central device using a transmission system of a supervisory control device according to an embodiment of the present invention and each terminal device are connected by a transmission path.

FIG. 2 is an explanatory diagram showing a data transmission / reception format in one frame of a transmission signal sequentially transmitted to a transmission line by a central device in the transmission system of the supervisory control device according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an example of the meanings of control pulses in the transmission system of the supervisory control device of one embodiment of the present invention.

FIG. 4 is an explanatory diagram showing the handling of data of a multipoint type terminal device by text type data of a transmission system of a supervisory control device of one embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a state in which data is transmitted and received in one frame of a transmission signal of the transmission system of the supervisory control device of one embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an operation of the terminal device of the transmission system of the supervisory control device according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram showing how to handle data of the composite type terminal device by the text type data of the transmission system of the supervisory control device of one embodiment of the present invention.

FIG. 8 is a system diagram showing an outline of a supervisory control device.

FIG. 9 is an explanatory diagram showing a format of data transmission / reception in one frame in a transmission system of a conventional monitoring control device.

FIG. 10 is an explanatory diagram showing an example of meanings of control pulses in a transmission system of a conventional monitoring control device.

FIG. 11 is an explanatory diagram showing another example of the meaning of the control pulse of the transmission system of the conventional monitoring control device.

FIG. 12 is an explanatory diagram showing a case where a central device reads a measured value by a transmission system of a conventional monitoring control device.

[Explanation of symbols]

B Central device C Terminal device D _a Address data D _c Control data D _r Reply data F ₁ Send band F ₂ Reply band L ₁ Transmission line

Claims (1)

[Claims] 1. A transmission band including address data and control data for designating and controlling a terminal device as a format of one frame from the central device to a plurality of various terminal devices connected to a transmission path from the central device. And a reply band for reply data from the terminal device are sequentially transmitted, and the equipment connected to each terminal device is sequentially monitored and controlled centrally by time division multiplex transmission through each terminal device. In the transmission method of the supervisory control device, the control data and the reply data are text-type data, respectively.