JPH0317803U

JPH0317803U -

Info

Publication number: JPH0317803U
Application number: JP7679989U
Authority: JP
Priority date: 1989-06-29
Filing date: 1989-06-29
Publication date: 1991-02-21

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示すブロツク図で
ある。１_１，１_２，１_ｎ…プログラマブルコントロー
ラ、３_１，３_ｎ…入出力装置、４…記録・表示装
置、５…入力データメモリ、６…中間データメモ
リ、７…トレースメモリ、８…ＣＰＵ。 FIG. 1 is a block diagram showing one embodiment of the present invention. 1 ₁ , 1 ₂ , 1 _n ...programmable controller, 3 ₁ , 3 _n ...input/output device, 4...recording/display device, 5...input data memory, 6...intermediate data memory, 7...trace memory, 8...CPU.

Claims

[Scope of utility model registration request]

In a system in which each piece of equipment is controlled by a programmable controller, and each programmable controller sends and receives data and commands necessary for cooperative control of each piece of equipment via LAN connection, each programmable controller stores input data from the equipment to be controlled. Specify an input data memory to store data, an intermediate data memory to store input/output data necessary for failure inspection when executing a sequence program based on this input data, and a specified range of data stored in this memory. trace memory that is saved and updated at the specified trace cycle;
A failure inspection device for a plant, comprising means for recording and displaying the data stored in the trace memory on a recording/display device when a failure occurs in the system.