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5 PROCEDURES BEFORE SYSTEM OPERATION
5.4 Execution Method for Self-diagnosis
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This section describes the procedure for self-diagnosis, status during self-diagnosis,
and results after self-diagnosis.
(1) Procedure for self-diagnosis
The procedure for self-diagnosis is as follows.
1) Set QJ71PB92D to the Self-diagnosis mode (MODE 2) using GX Configurator-
DP or operation mode change request signal (Y11).
For the operation mode change operation, refer to the PROFIBUS-DP
configurator operating manual.
The self-diagnosis will start automatically.
2) The TEST LED on QJ71PB92D will flash during the self-diagnosis.
3) When the results of the self-diagnosis are normal: The TEST LED and FAULT
LED go off.
If the results of the self-diagnosis are abnormal (an error occurs): The TEST
LED and FAULT LED will light up.
If the results of the self-diagnosis are abnormal, the self-diagnosis status code
will be stored in the self-diagnosis status area (buffer memory address: 2258
(8D2
)) of the buffer memory.
H
Self-diagnosis status code
8001
H
8002
H
8003
H
8004
H
8005
H
80FF
H
MELSEC-Q
Type of error
MPU test error
Timer test error
Interruption test error
RAM1 test error
RAM2 test error
Flash ROM test error
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