Mitsubishi QCPU (Q Mode), Руководство пользователя

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MELSEC-Q
7 FUNCTION
7.16 Failure History
The High Performance model QCPU can store the failure history (results detected from
the self-diagnosis function and the time) in the memory.
POINT
The detection time uses the High Performance model QCPU internal clock, so
make sure to set the correct time when using the High Performance model QCPU
for the first time.
(1) Storage Area
(a) The latest 16 failures are stored in the latched High Performance model
QCPU failure history storage memory.
(b) When storing more than 16, the history can be stored in the memory card
file using PLC RAS setting in the “(PLC) Parameter” box.
(c) When the history count set in the parameter and that stored in the memory
card are different after the following operation is performed, the contents of
the memory card history file is cleared, then the 16 failure data in the High
Performance model QCPU failure history storage memory is trandferred to
the history file.
1) When the history count in the parameter history file is changed in the
middle of operation.
2) When a memory card, which has a different history count from that set
in the parameter, is mounted.
(d) The storage area in the failure history file is as follows:
Storage area File in the set memory card
Amount that can be stored
Max. 100 (can be changed)
1
1: When the number of storage exceed the amount that can be stored, the oldest
history is overwritten with the latest history.
POINT
Even if the failure history file set in the parameter does not exist in the memory
card, the error will not occur in the High Performance model QCPU.
The High Performance model QCPU stores the failure to the failure history storage
file.
(2) Failure History Clearing Method
The failure history storage memory/failure history file are cleared using the failure
history clear in the GX Developer PLC diagnosis mode.
Data stored in both the High Performance model QCPU failure history storage
memory and failure history file within the memory card can be cleared with a
failure history clear.