JPH0683406A - Ladder circuit monitor device - Google Patents

Abstract

PURPOSE:To easily grasp I/O address setting states of a coil, a contact, etc., from a circuit diagram on a display screen. CONSTITUTION:In response to an indication from an input means 20, a display ladder selecting means 22 selects the I/O address of a ladder circuit and a detecting means 36 detects the I/O address setting states of the coil, contact, etc., of the corresponding ladder circuit from a sequence controller 14 through an interface 16. A setting means 30 sets symbols for the coil, contact, etc., a display changing means 32 changes the symbols according to the address setting states, and a display means 34 displays the circuit diagram.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladder circuit monitoring device, and more specifically, it displays the ladder circuit by displaying a circuit diagram reflecting the I / O address states of coils, contacts, etc. of the ladder circuit. The present invention relates to a ladder circuit monitor device capable of easily grasping the state of.

[0002]

2. Description of the Related Art When a sequence program is created, a simulation is performed to confirm its operation. In this case, since an actual control target is not connected to the sequence controller, the I / O addresses of some coils, contacts, etc. are switched from the enable state to the disable state. After the simulation is completed, the disabled state of the I / O address is released and the controlled object is operated.

In this case, if the user forgets to cancel the disable state, the controlled object will malfunction.

Generally, in a ladder circuit diagram created on the basis of equipment specifications and a time chart, it is necessary to confirm the setting state of the I / O address on the ladder circuit diagram in order to determine the operation timing between the actuators. . Therefore,
A ladder circuit monitor is required.

Conventionally, the ladder circuit monitoring device displays only the disabled state of the coil, and only the ON / OFF display of the contact, and the setting state of the address to the symbol such as the coil or the contact on the circuit diagram. Is not displayed.

[0006]

Therefore, in the conventional ladder circuit monitoring device, it is possible to disable / disable the contact.
The enable status cannot be grasped, and forgetting to set or release disable / enable, causing malfunction of the object.

Further, since the conventional screen display does not directly reflect the monitor state on the circuit diagram, the I / O address state cannot be easily grasped and there are many oversights.

The present invention solves this kind of problem, and in addition to the conventional display of the disable / enable state of the coil, the contact is also disabled / enabled.
It is an object of the present invention to provide a ladder circuit monitor device that realizes an enabled state display and can easily grasp the states of coils, contacts, and the like.

[0009]

In order to achieve the above-mentioned object, the present invention is a ladder circuit monitoring device in a sequence controller, wherein a coil of the ladder circuit,
Detecting means for detecting the setting state of I / O addresses of contacts and the like, setting means for setting symbols for displaying the coils, contacts and the like, and I / O for displaying the symbols displayed by the setting means. It is characterized in that it has display changing means for changing the address ON / OFF and disable / enable setting states, and display means for displaying a ladder circuit diagram composed of the symbols.

[0010]

In the ladder circuit monitoring device according to the present invention, the ON / OFF state and the disable / enable state of the coil, contact, etc. are detected, and the set symbols of the coil, contact, etc. are changed according to the state. , Display as ladder circuit diagram.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A ladder circuit monitor device according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the arrangement of a ladder circuit monitoring apparatus according to this embodiment. In the figure, a ladder circuit monitoring device includes an input means 20 for receiving the instruction from an input device 19 such as a keyboard for giving an instruction such as a ladder circuit number to be monitored or screen switching and termination.
Display ladder selecting means 22 for selecting a ladder circuit to be displayed from the instruction, communication means 24 for extracting an address to be monitored from the ladder circuit and receiving the status of the address from the sequence controller 14 through the interface 16, and receiving ON / OF of the above addresses
ON / OFF detecting means 26 for detecting the state of F
And a disable / enable (DIS / ENA) detecting means 28 for detecting the state of disable / enable, and a symbol definition file 40 in which symbols corresponding to the detected addresses of the coils, contacts, etc. are defined. Setting means 30 for setting the form, display changing means 32 for setting graphic display and color display based on the detected state in the display form, and display means for displaying on the display device 12 based on the display changing means 32. And 34. In FIG. 1, reference numeral 18 indicates a ladder circuit monitor device, and reference numeral 36 indicates a detecting means.

Next, the operation of the ladder circuit monitoring apparatus according to this embodiment will be described in detail below.

FIG. 2 is a flow chart showing the processing flow of the ladder circuit monitoring apparatus according to this embodiment. Referring to FIG. 1, first, the input means 20 is an input device 1 such as a keyboard.
9 receives the number of the ladder circuit diagram to be monitored, and the display ladder selecting means 22 controls the sequence controller 14
Then, the addresses for monitoring the coils, contacts, etc. of the ladder circuit are extracted via the interface 16 (step S1). Next, the display ladder selection means 22
An address for one screen of the display device 12 is extracted from the address to create a table for display (step S
2). Then, the communication means 24 receives the state of the extracted address from the sequence controller 14 (step S3). The ON / OFF detecting means 26 detects the ON / OFF state of the received address and sets it in the table (step S4). Also, DIS / ENA
The detecting means 28 detects the disable / enable state of the received address and sets it in the table (step S5). On the other hand, the setting means 30 selects the symbol of the circuit corresponding to the address on the table as shown in the display example of the screen of FIG. 3 from the symbol definition file 40 and sets it in the table as the display form (step S6). . Then, the display changing means 32 is turned on / off.
When the state of the address on the table detected by the detection means 26 (step S4) is ON, the symbol is displayed as a bold line as shown in the display example of [Address 00001] on the screen of FIG. The form is set (step S7). Further, the display changing means 32 is a DIS / ENA.
When the state of the address on the table detected by the detecting means 28 (step S5) is disabled, as shown in the display example of [address 00001] on the screen of FIG.
When the display form is set to display the symbol in yellow and the symbol is enabled, [Address 02
002], the display form is set so that the hand symbol is displayed in green (step S
8). Next, the display changing means 32 sets the coordinates for displaying the table (step S9). And
The display means 34 displays on the display device 12 based on the set coordinates (step S10). After the display, the input means 20 receives an input from a keyboard or the like (step S11). At this time, when the number of the ladder circuit diagram is designated again, the input unit 20 extracts the addresses to monitor the coils, contacts, etc. of the ladder circuit of the input number, and returns to step S2. Then, when screen data such as the next screen display is designated for the displayed ladder circuit diagram, the input unit 20 causes the display ladder selection unit 22 to display a coil based on the screen data of the ladder circuit diagram.
The address to be monitored for the contact or the like is extracted and the process returns to step S2. When the input means 20 is in the input waiting state for a certain period of time, the display device 12 returns to step S3, displays the most recently received state of the displayed ladder circuit diagram, and enters the input waiting state again. Then, when the end is designated, the input unit 20 ends the processing of the ladder circuit monitoring device.

As described above, in the ladder circuit monitoring device of the present invention, the disable / enable state of the coil, the contact, etc. and the ON / OFF state can be grasped by directly confirming the position on the circuit diagram on the screen.

[0016]

According to the ladder circuit monitor device of the present invention, the following effects can be obtained.

The ON / OFF state and the disable / enable state of the coil, the contact, etc. can be simultaneously displayed on the ladder circuit, and the state of the coil, the contact, etc. can be easily grasped from these displays.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a ladder circuit monitoring device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the ladder circuit monitoring device according to the embodiment of the present invention.

FIG. 3 is a diagram showing a screen display of a ladder circuit monitor device according to an embodiment of the present invention.

[Explanation of symbols]

 12 ... Display device 14 ... Sequence controller 16 ... Interface 18 ... Ladder circuit monitor device 19 ... Input device 20 ... Input means 22 ... Display ladder selecting means 24 ... Communication means 26 ... ON / OFF detecting means 28 ... DIS / ENA detecting means 30 ... setting means 32 ... display changing means 34 ... display means 36 ... detecting means 40 ... symbol definition file

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Taku Makita 1-10-1 Shin-Sayama, Sayama-shi, Saitama Honda Engineering Co., Ltd.

Claims (1)

[Claims] 1. A ladder circuit monitoring device in a sequence controller, comprising: detecting means for detecting a setting state of an I / O address of a coil, a contact, etc. of the ladder circuit; and a symbol for displaying the coil, the contact, etc. And a display mode of the symbol set by the setting means.
Ladder circuit comprising: display changing means for changing the ON / OFF of the / O address and the setting state of disable / enable; and display means for displaying a ladder circuit diagram composed of the symbols. Monitor device.