6
FUNCTIONS
6.8 Recording the operation contents and self-diagnostics error occurrence contents (operation/error history
function)
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6.8 Recording the operation contents and self-diagnostics error
occurrence contents (operation/error history function)
(1) What the operation/error history function is
The operation/error history function records the operations that have been executed
to the CPU module from the outside and the self-diagnostics errors that have
occurred in the CPU module in the past. The objective of this function is to make
troubleshooting easier.
(2) Data stored in the operation/error history area
The CPU module stores the operations that have been executed to the CPU module
from the outside and the self-diagnostics errors in the operation/error history area.
(a) Operations executed to the CPU module from the outside
The following are stored as operations executed to the CPU module from the
outside.
• Online operations from GX Developer
• Operations with the CPU module RUN/STOP/RESET
• Input power supply ON/OFF
Table6.13 shows the operations stored in the operation/error history.
Diagram 6.13 Recording the operation/error history to the CPU module
GX Developer
Operation error history
CPU module
Remote STOP
4101:OPERATION ERROR
5001:WDT ERROR
Record
Operation
from
outside
Record self-
diagnostics
error
Operation error
occurred
WDT error occurred
OP161:SWITCH TO STOP
REMOTERY
Summary of Contents for MELSEC QS Series
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