JPS6167106A - High speed retrieval system of sequence circuit - Google Patents

Abstract

PURPOSE:To decode a control program and to retrieve an optional program at the same time by reading sequentially a sequence control program stored in a storage section by an operation section and retrieving an optional sequence control program at the same time in the process of decoding. CONSTITUTION:After the control section 6 receiving a retrieval command from a monitor 5 detects a logic decoding end signal from a logic decoding section 11, an element code of a sequence control program desired to monitored is set to a register 7 and a detection start signal is fed to a coincidence detection circuit 8. The content read from the storage section 1 and latched to a register 9 is compared with the content of the register 7 in the circuit 8. As a result, when the coincidence is detected, a coincidence signal is fed to the control section 6 and a memory address of the element monitored via a gate 12 is fed thereto. Thus, the control section 6 informs the memory address storing the sequence circuit program desired to be monitored to the monitor 5.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a high-speed search method for sequence circuits. More specifically, the present invention relates to a high-speed search method for sequence circuits. More specifically, the present invention relates to a high-speed search method for sequence circuits. This relates to the search method.

[Conventional technology]

In a stored program type programmable controller (hereinafter referred to as a PC), generally, as shown in FIG. When searching for any sequence control program, 1.
11th Book 1. σ Described in Part I 1. The copied content must be read out and searched.

[Problem that the invention seeks to solve]

However, in such a configuration, the calculation section 3 and the control section 2 cannot read the contents stored in the storage section 1 at the same time, so if the calculation speed of the calculation section 3 is important, the sequence control program should be Searching takes time. There is a problem.

The present invention aims to solve the above problems and speed up the search for a sequence control program without slowing down the calculation speed of the calculation section 3.

[Means for solving problems]

In order to solve such problems, the present invention has the following features: As shown in FIG. It is characterized by searching for any sequence control program.

[Effect]

With this configuration, it is possible to search for the 1a11 program in the order system of 1, ☆, and 1, without slowing down the calculation speed in the calculation section.

Tsumari, deciphering sequence control programs.

Searches for arbitrary sequence control programs can be performed in parallel at the same time.

〔Example〕

A specific embodiment of the present invention will be described below with reference to FIG.

In FIG. 3, 5 is a monitor device; 7. 9. 10
1 is a register, 6 is a control section, 8 is a gate for the coincidence detection circuit 812, 1 is a storage section, and 11 is a logic decoding section.

4 is an input/output section.

In such a configuration, the monitor device 5 issues a search command including the element code (node type) of the sequence circuit program to be monitored to the control unit 6. Here, the monitor device 5 may be a programming panel dedicated to a PC, or may be another control device (electronic computer).

After receiving the search command from the monitor device 5, the control section 7 detects the logic decoding completion signal from the logic decoding section 11, and sets the element code of the no-kense control program to be monitored in the staff/staff. A detection start signal is commanded.

After the logic decoding section 11 exchanges input/output signals with the nine-person output section 4, it starts decoding the logic again. When the logic decoding section 11 reads out the sequence control program stored in the storage section I, the memory address is latched into the register 10, and the contents read from the storage section 1 are latched into the register 9. The contents of register 9 are sent to minus number output circuit 8 and compared with the contents of register 7. If the contents do not match, nothing changes. Logic decoding unit 11
reads the contents of the next memory address sequentially and decodes the logic, and at the same time the memory address is latched into register 10, the read contents are latched into register 9, and the contents of register 9 and register 7 are Each time, a comparison is made by the minus number construction circuit 11.

When the coincidence detection circuit 11 detects that the contents read from the storage section 1 and the contents of the register 7 match, the control section 7
A match signal is sent to , and the memory address of the monitored element is sent via gate 12 . The control unit 6 can inform the monitor device 5 of the memory address where the sequence circuit program to be monitored is stored.

When the control unit 7 detects the logic decoding completion signal from the logic decoding unit 11 without receiving a matching signal from the -number output circuit 11, it recognizes that the sequence control program to be monitored is not programmed in the storage unit 1. The detection failure is notified to the monitor device 5.

In this way, the logic decoding unit 11 sequentially calculates the sequence control program stored in the storage unit 1 (
Then, the monitor device 5 reads:

It is possible to know the memory address where the sequence control program to be monitored is stored.

〔Effect of the invention〕

As described above, according to the present invention, in the process of sequentially reading and decoding the sequence control programs stored in the memory of a PC, it is possible to search for sequence control programs that are to be monitored simultaneously. The speed of the program decoding process is not affected at all by the search for an arbitrary sequence control program.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the concept of the present invention. FIG. 2 is a block diagram showing a conventional example, and FIG. 3 is a block diagram showing a specific implementation of the present invention. In the figure, 5 is a monitor device, 6 is a control unit, and 1 is a storage unit. 11 is a logic decoding section, 4 is an input/output section, and 8 is a coincidence detection circuit. Patent applicant: Yaskawa Electric Manufacturing Co., Ltd. Figure 1 Figure 2

Claims (1)

[Scope of Claims] (a) a storage section that stores a sequence control program; (b) a logic decoding section that sequentially reads out the sequence control program from the storage section and performs calculations; (c) this logic decoding section that When sequentially reading the stored contents from the storage section, it is detected whether the contents match the sequence control program to be searched, and when the contents match,
(d) a gate circuit that opens a gate in response to the match signal and allows the memory address at that time to pass through; (e) a sequence in which the memory address that has passed through the gate circuit is received and searched; (f) a control unit capable of knowing the address where the control program is stored; (f) giving a search command including the sequence control program to be searched to the control unit; In a programmable controller equipped with a monitor device that receives stored addresses, the logic decoding section sequentially reads and decodes the sequence control program stored in the storage section, and the control section simultaneously performs arbitrary sequence control in parallel. A high-speed search method for sequence circuits that is characterized by searching programs.