JPH075901A - Descentralized controller - Google Patents

Abstract

PURPOSE:To provide a descentralized controller which can perform an inching operation interlocking a manual operation and also can operate an operating terminal like a belt conveyor when necessary. CONSTITUTION:An operation monitoring device is provided with an operating means which shows the increasing and reducing directions and the 1st and 2nd operating signal output means which output a signal that increases or reduces with a fixed tilt from 50% of a full span for the first prescribed time after an increasing or reducing direction is shown and then output a signal equivalent to 100% or 0% for a fixed time respectively. Meanwhile, a controller is provided with the 1st and 2nd pulse width converting means which output the status signals with the value of the received signal Do equivalent to 100% and 0%, respectively. Then, the pulse width signals corresponding to each Do value are repetitively transmitted through the increase and reduction terminals with 50%<Do<100% and 0%<Do<50% respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decentralized control device for monitoring operation of electric motors, solenoid valves, belt conveyors, cranes, ITVs, etc. installed in a process and operating states of operating ends in response to the operations. More specifically, in a distributed control device including a control device that outputs an operation signal to an operation end installed in a process, and an operation monitoring device that performs operation / monitoring of the process, a motor and a motorized valve are provided. , Improvement of operability when operating various operation ends such as a belt conveyor and ITV.

[0002]

2. Description of the Related Art A distributed control device is a plurality of control devices (field control stations) distributed according to the scale of a process to be controlled, and an operation monitoring device for performing control operation and process monitoring. (Operator station) are connected to each other via a communication line. In such a distributed control device, for example, a feedback control instrument having a function of performing PID control calculation, a sequence control instrument for sequence control, an ON / OFF control of an electric motor, an electric valve, or the like is controlled. A plurality of switch instruments and the like are prepared, and these various instruments can be appropriately combined and used according to the target process.

[0003]

In the distributed control device having such a configuration, the switch instrument conventionally provided in the control device has an operating end assuming an electric motor, a solenoid valve, a pump, or the like. It is configured to output a signal that changes on and off. For this reason, for example, it has been impossible to perform an operation (inching operation) such as turning a desired chord using this switch instrument.

The present invention has been made in view of the above points, and can perform an inching operation linked to a manual operation or the like, and if necessary, an operation with a long operation time (such as a belt conveyor) It is an object of the present invention to provide a decentralized control device equipped with an operation instrument that enables large operation).

[0005]

SUMMARY OF THE INVENTION The present invention to achieve such an object is to provide a control device for outputting an operation signal to an operation end installed in a process and a control device connected to the control device via a communication line. A distributed control device comprising an operation monitoring device for operating / monitoring a process, comprising: operating means for instructing the operation monitoring device in an increasing direction and a decreasing direction; and an increasing direction instruction for the operating means. For the first predetermined time after receiving the signal, a signal that increases with a constant inclination from 50% of the full span is output, and thereafter a predetermined time is 10
A first operation signal output means for outputting a signal corresponding to 0% and a signal for decreasing a constant slope with a lapse of time from 50% of full span in response to a decrease instruction of the operation means are output. , And a second operation signal output means for outputting a signal corresponding to 0% for a predetermined time thereafter,
The control device receives a signal from the first operation signal output means of the operation monitoring device, and its value Do is 50% <Do <
When it is in the range of 100%, a pulse width signal corresponding to the value is repeatedly output from the increasing terminal, and when it is a signal corresponding to 100%, a first pulse width conversion means for outputting a status signal; A signal from the second operation signal output means of the operation monitoring device is received, and its value Do is 0% <Do <
When it is in the range of 50%, a pulse width signal corresponding to the value is repeatedly output from the decreasing terminal, and when it is a signal corresponding to 0%, a second pulse width conversion means for outputting a status signal, A distributed control device characterized by being provided.

[0006]

The operation means is composed of an instrument diagram simulating the buttons for instructing the increasing direction and the decreasing direction displayed on the display screen of the operation monitoring device, and the operating end installed in the process is instructed in the increasing direction and the decreasing direction, respectively. In order to operate, these increase button and decrease button are operated.

The first or second operation signal output means outputs a signal that increases or decreases from 50% of the full span with a constant inclination over time for the first predetermined time in response to the operation of each of these buttons. Then, a signal corresponding to 100% or 0% is output. These signals are transmitted to the control device side via the communication line. In the control device, the first and second pulse width conversion means have an increasing terminal and a decreasing terminal, and when the signal is a signal increasing or decreasing at a certain slope, the increasing or decreasing terminal is connected to the process side. A pulse width signal having a short time width corresponding to the value is repeatedly output, and if the signal corresponds to 100% or 0%, a status signal is output.

Thus, the inching operation can be performed by repeatedly operating the increase instruction or decrease instruction button in a short time, and by continuously operating each button for a predetermined time or more, The status output status is entered and full stroke operation that handles a large amount of operation is possible.

[0009]

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a configuration block diagram showing an embodiment of the present invention. In the figure, OP is an operation monitoring device (operator station), FC is a control device including an operation instrument capable of outputting a signal by manual operation or the like to an operation end (actuator) AC installed in the process,
It is connected to the operation monitoring device OP via the communication line BS. Here, one control device FC is connected to the communication line BS, but normally, a plurality of control devices FC are distributed and arranged according to the scale of the process to be controlled.

As the operating end AC, for example, an operating end such as an electric motor or a solenoid valve, an ITV, a belt conveyor, or the like can be used. Upon receiving an instruction signal INCD, DECD for increasing or decreasing from the control device FC. It is supposed to work. In the operation monitoring device OP, reference numeral 1 is a display means such as a CRT, and various graphics and an operation instrument diagram SK are displayed on the display screen as required. Here, the operation instrument diagram SK is provided with an increase button B1 for instructing an increasing direction and a decrease button B2 for instructing a decreasing direction, and an operation for manually operating an electric motor, a solenoid valve, a belt conveyor, etc. installed in the process. Constitutes a means. Although not shown, the display means 1 may be provided with a touch screen function.

Reference numeral 2 denotes a keyboard, in which, in addition to various data input keys, an operation instrument diagram S displayed on the screen.
Keys B11 and B12 corresponding to K buttons B1 and B2
Is provided. These keys B11 and B12 become effective when the operation instrument diagram SK is displayed on the screen, and the key B
When 11, 11 and B12 are operated, a signal indicating an increasing direction and a signal indicating a decreasing direction are output as operation signals from the corresponding operation instrument diagram SK. Three
Is a mouse as a pointing device. It is assumed that the buttons B1, B2 of the operation instrument diagram SK are operated by the operation buttons B11, B12 provided on the keyboard 2, but the buttons B1, B1 of the operation instrument diagram SK displayed on the screen. A configuration in which a signal corresponding to the operation is output by touching B2 may also be used.

Reference numeral 4 denotes a first operation signal output means, which receives an operation of the increase button B1 (operation of the key B11 of the keyboard 2) of the operation instrument diagram SK which constitutes the operation means, and receives a first predetermined time (for example, the key). The data corresponding to 50% of the full span value is output from the data corresponding to 50% of the full-span value until the second operation has elapsed), and then the data corresponding to 100% is output thereafter. Reference numeral 5 is a second operation signal output means, which receives the operation of the decrease button B2 of the operation instrument diagram SK (operation of the key B12 of the keyboard 2), and the first predetermined time is from the data corresponding to 50% with the passage of time. Outputs data that decreases with a constant slope,
After that, the data corresponding to 0% is output.

Reference numeral 6 denotes a communication interface, which is a data interface according to a communication control protocol (for example, a token passing system for carrying out communication control by carrying around a communication right called a token) determined between the operation monitoring device OP and each control device FC. It has the function of transmitting. Note that the cycle of data transmission performed using the communication line BS is selected to be short, and changes in data handled by the operation monitoring device OP and the control device FC are mutually reflected between the two. Be present.

In the control unit FC, 7 is a communication line BS
Is a block conceptually showing an operation instrument provided in the control device. This operation instrument is composed of a first pulse width conversion means 81 and a second pulse width conversion means 82. The first pulse width conversion means 81 is configured to output a pulse width signal corresponding to the data value from the first operation signal output means 4 of the operation monitoring device OP from the increasing terminal 91. That is, when the signal from the second operation signal output means 5 of the operation monitoring device OP is a signal increasing from 50% of the full span value with a constant inclination over time, the increasing terminal 9
A pulse width signal with a short time width (for example, a pulse width signal with 10 millisecond resolution) corresponding to the value is repeatedly output from 1, and if the value corresponds to the full span (100%), the status signal (infinity Pulse width signal).

Similarly, the second pulse width conversion means 82 is also configured to output a pulse width signal corresponding to the data value from the second operation signal output means 5 of the operation monitoring device OP from the increasing terminal 92. Has been done. That is, the operation monitoring device O
When the signal from the second operation signal output means 5 of P is a signal that decreases from 50% at a constant inclination with the passage of time, the time width corresponding to the value is short from the decreasing terminal 92 on the process side. The pulse width signal is repeatedly output, and if the signal corresponds to 0%, the status signal is output.

In addition to the operation instruments shown here, a large number of control instruments for performing feedback control calculations, sequence control instruments for performing sequence control calculations, and the like are provided in the controller FC. The operation of the device configured as described above will be described below. First, when the operator manually operates a specific operating end (motor, solenoid valve, belt conveyor, etc.) installed in the process, the instrument of the operation instrument corresponding to the display screen of the monitoring operation device OP is displayed. Figure SK
Is displayed, and the necessary operation command is given using the instrument diagram.

The first and second operation signal output means 4 and 5 in the operation monitoring device OP are the operation buttons B1 of the operation instrument SK.
In accordance with the operation of B2 (operation of each key B11, B12 of the keyboard 2), a signal that increases or decreases with a constant inclination with time is output for the first predetermined time, and thereafter a signal corresponding to 100% or 0%. Is output. FIG. 2 is a diagram showing signals output by the first and second operation signal output means 4 and 5 in accordance with the operation of the operation buttons B1 and B2.

Now, operate the increase button B1 (key B11
Then, for the first 2 seconds after the button B1 is started to be operated (after being pressed), as shown in the figure, a signal that gradually increases with a constant slope is output from the output of 50% of the full span value. It If the button B1 is continuously operated for 2 seconds or more, then the status output state is entered and a 100% (full span) signal is output.
Then, when the operation of the button B1 is completed, the output returns to 50%.

Similarly, the decrease button B2 is operated (key B1
2), for the first 2 seconds after starting to operate the button B2, as shown in the figure, a signal that gradually decreases from the 50% output with a constant inclination with the passage of time is output.
When the button B2 is continuously operated for 2 seconds or more, the status output state is set, and a 0% signal is output. When the operation of button B2 ends, the output returns to 50%.

Here, the tilt angle at which the signal output after the button is started to increase or decrease is selected in consideration of the time during which the operating end moves for a full stroke, and the like. For example, if the operating end is such that the time required for full stroke movement is about 10 seconds, it is set to change by about 0.1% with one digit operation (200 milliseconds operation). Such signals output from the first and second operation signal output means 4 and 5 are applied to the corresponding control device F via the communication line BS.
It is transmitted to the C side.

In the control device FC, the first and second pulse width conversion means 81 and 82 respectively include an increasing terminal 91 and a decreasing terminal 92, and are sent from the operation monitoring device OP side via the communication interface 7. A pulse width signal corresponding to the value of the operation signal is output. FIG. 3 is a diagram showing the relationship between the input values to the first and second pulse width conversion means 81 and 82 and the states of the pulse width signals output to the increasing terminal 91 and the decreasing terminal 92.

When the input value Do is 0%, the increase terminal 9
The signal INCD output from 1 turns off, and the signal DECD output from the decrease terminal 92 turns on. On the other hand, when the input value is 100%, the signal INCD output from the increasing terminal 91 is turned on and the signal DECD output from the decreasing terminal 92 is turned off. When the input value is 50%, both the signal INCD output from the increase terminal 91 and the signal DECD output from the decrease terminal 92 are off. Further, as is clear from this figure, signals are not simultaneously output from the increasing terminal 91 and the decreasing terminal 92.

When the input value Do is between 0% and 50% (0% <Do <50%), the signal INCD output from the increasing terminal 91 is turned off, and the signal DECD output from the decreasing terminal 92 is input. The pulse width signal has a time width corresponding to the value. When the input value Do is between 50% and 100% (50% <Do <100%), the signal INCD output from the increasing terminal 91 becomes a pulse width signal having a time width according to the input value, and the decreasing terminal 92. Signal DEC output from
D is off.

As described above, in the operation monitoring device OP, the operation buttons B1 and B2 (keys B11 and B12) are, for example, 2 buttons.
By performing an inching operation such as repeatedly pressing for a time shorter than a second, a pulse width signal having a short time width is output from the increasing terminal 91 or the increasing terminal 92 to the operating end AC. The operating terminal AC receives such a short pulse width signal and is gradually driven. Therefore, by using this operation instrument to perform an inching operation on the operation buttons B1 and B2, it is possible to perform a manual operation such that the operation end AC such as ITV is gradually moved.

When the operation buttons B1 and B2 are continuously operated for more than 2 seconds, for example, an ON signal corresponding to a full stroke is output from the increasing terminal 91 or the increasing terminal 92 toward the operating end AC, and the operating end AC is output. In response to this, the AC performs a full stroke operation. Therefore, by operating the operation button continuously for a predetermined time or longer with this operation instrument, the operation end AC such as a belt conveyor is
Manual operation such as driving in one direction (or the other direction) can be performed.

In the above embodiment, the operation instrument 8 is constructed so that the pulse width signals are separately output from the first and second pulse width converting means to the increasing terminal 91 and the decreasing terminal 92. However, the configuration may be such that a pulse width signal indicating increase or decrease is received and a contact signal corresponding to the pulse width is output. In addition, the operation instrument diagram SK displayed on the screen may be configured to display an answerback signal from the operation terminal AC.

[0027]

As described above in detail, according to the present invention, an inching operation for driving the operation end by outputting a small operation amount by using the operation instrument and operating the operation button thereof. Then, it is possible to perform an operation such that a signal corresponding to a full stroke is output to the operation end to obtain a large operation amount.

Therefore, according to the present invention, a distributed control device having a wide range of application, which has a function of performing an inching operation linked to a manual operation, and having a function of operating an operating end such as a belt conveyor as required. Can be realized.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing signals output by first and second operation signal output means 4 and 5 in accordance with operation of operation buttons B1 and B2.

FIG. 3 is a diagram showing a relationship between input values to first and second pulse width conversion means 81 and 82 and states of pulse width signals output to an increasing terminal 91 and a decreasing terminal 92.

[Explanation of symbols] FC control device OP operation monitoring device BS communication line SK operation instrument (operation means) AC operation end (actuator) 1 display means B1 increase button B2 decrease button 2 keyboard B11, increase button corresponding key B12 decrease button corresponding key 3 Mouse 4 1st Operation Signal Output Means 5 2nd Operation Signal Output Means 6 Communication Interface 7 Communication Interface 8 Operation Button Instrument 81 First Pulse Width Conversion Means 82 Second Pulse Width Conversion Means 91 Increasing Terminal 92 Decreasing Terminal

Claims (1)

[Claims] 1. A control device which outputs an operation signal to an operation end installed in a process, and an operation monitoring device which is connected to the control device through a communication line and which operates and monitors the process. A distributed control device according to claim 1, wherein the operation monitoring device has an operating means for instructing an increasing direction and a decreasing direction, and an initial predetermined time when the operating direction is instructed by the operating means, as the time elapses from 50% of full span. Outputs an increasing signal with a constant slope, then 100% for a predetermined time
A first operation signal output means for outputting a signal corresponding to, and a signal for decreasing a constant slope with a lapse of time from 50% of full span in response to a decrease instruction of the operation means, and thereafter A second operation signal output means for outputting a signal corresponding to 0% for a predetermined time is provided, and the control device receives a signal from the first operation signal output means of the operation monitoring device and outputs the value ( If Do) is in the range of 50% <Do <100%, the pulse width signal corresponding to the value is repeatedly output from the increasing terminal, and if it is a signal corresponding to 100%, the status signal is output first. When the signal Do is in the range of 0% <Do <50%, the signal is received from the pulse width conversion means and the second operation signal output means of the operation monitoring device, and the value is changed from the decreasing terminal according to the value. Pulse width signal A distributed control device comprising: a second pulse width conversion means for outputting a status signal when the signal is repeatedly output and corresponds to 0%.