Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 225

(2) Priorities and cause numbers
The following table lists the description and priority of the cause numbers set to the special registers SD207 to
SD209.
Cause
Priority number
(hexadecimal)
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".
To remain the ERR. LED off even when a fuse blown error is detected, set the cause number setting area where the
Ex.
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).
Displayed error message
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 • PID ERROR
7 • Annunciator
8 -
9 • BATTERY ERROR
A -
SD20
0 0 A 9
• 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
*1
• File access error
• Flash ROM access count over error
• Constant scan setting time-out error
*2
• Another CPU error in multiple CPU systems
• PID control instruction error
SD20 SD20
8 7 6 5 4 3 0 1
CHAPTER 3 FUNCTIONS
Remarks
-
-
-
-
223
3