Error History; Basic Model Qcpu - Mitsubishi Q00JCPU User Manual

6
FUNCTIONS

6.18 Error History

The CPU module can store the error history (results detected from the self-diagnosis
function and the time) in the memory.
The error history can be checked by choosing [Diagnostics]
Developer.

6.18.1 Basic model QCPU

(1) Storage area
(2) Stored data
(3) Error history clearing method
6
- 144 6.18 Error History
6.18.1 Basic model QCPU
POINT
The detection time uses the CPU module internal clock, so make sure to set the
correct time when using the CPU module for the first time.
( Section 6.5)
The 16 latest errors are stored into the latched error history storage memory of the
Basic model QCPU.
If the same error occurs two or more times while the PLC power is ON, the data is
stored only once into the error history storage memory.
To clear the error history storage memory, choose [Diagnostics]
on GX Developer and click the
Clearing the error history clears all data in the error history storage memory of the
Basic model QCPU.
button.
Clear log
[PLC diagnostics] on GX
[PLC diagnostics]