Mitsubishi Electric melsec q00ujcpu User Manual page 269

(2) Priorities and cause numbers
The following table shows the description and priority of the cause numbers set to the special registers SD207 to
SD209.
Priority
1
2
3
4
5
6
7
8
9
10
*1: The Q00UJCPU, Q00UCPU, and Q01UCPU cannot display the error message.
*2: The Q00UJCPU cannot display the error message.
●
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
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).
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Table6.36 List of cause numbers and priorities
Cause number
Displayed error message
(hexadecimal)
1 • AC/DC DOWN
• UNIT VERIFY ERR.
• FUSE BREAK OFF
2
• SP.UNIT ERROR
• SP.UNIT DOWN
• OPERATION ERROR
3 • SFCP OPE.ERROR
• SFCP EXE.ERROR
• ICM.OPE.ERROR
4
• FILE OPE.ERROR
• FLASH ROM ERROR
• PRG.TIME OVER
5
• MULTI CPU ERROR
6
7 • Annunciator
8
9 • BATTERY ERROR
A
To remain the ERR. LED off even when a fuse blown error is detected, set the cause number setting area
SD20
0 0
Figure 6.90 Cause numbers stored in SD207 to SD209
*1
*2
-
-
-
SD20
A 9 8 7 6 5 4
Remarks
• Power-off
• I/O module verification error
• Fuse blown
• Intelligent function module verification error
• Operation error
• SFC instruction operation error
• SFC program execution error
• Memory card operation error
• File access error
• Flash ROM access count over error
• Constant scan setting time-out error
• Another CPU error in multiple CPU systems
SD20
3 0 1