Mitsubishi 00JCPU User Manual page 304

●
To remain the LED off even in case of an error, set the cause number setting area (each 4 bits) of SD207 to SD209 that
stores the corresponding cause number to "0".
[Example]
To remain the ERR. LED off even when a fuse blown error is detected, set the cause number setting area where
the cause number "2" is stored to "0".
Because the cause number "2" is not set, the ERR.LED remains off even if a fuse blown is detected.
In this case, even if another error with the cause number "2" (I/O module verification error or intelligent function module
verification error) is detected, the ERR.LED remains off.
●
If "0" is set to the cause number setting area (setting that does not turn on the LED), SM0 (Diagnostic errors) and SM1
(Self-diagnostic error) turn on, and the error code is stored to SD0 (Diagnostic errors).
6 - 124
SD209 SD208
0 0 A 9 8 7
Figure 6.86 Cause numbers stored in SD207 to SD209
SD207
6 5 4 3 0 1