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CHAPTER 3 FUNCTIONS
3
3.20 LED Indication
3.20.2 LED indication priority
(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.
*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".
● 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).
Priority
Cause
number
(hexadecimal)
Displayed error message Remarks
1 1 • AC/DC DOWN • Power-off
22
• UNIT VERIFY ERR.
• FUSE BREAK OFF
• SP.UNIT ERROR
• SP.UNIT DOWN
• I/O module verification error
• Fuse blown
• Intelligent function module verification error
33
• OPERATION ERROR
• SFCP OPE.ERROR
• SFCP EXE.ERROR
• Operation error
• SFC instruction operation error
• SFC program execution error
44
• ICM.OPE.ERROR
*1
• FILE OPE.ERROR
• Memory card operation error
• File access error
• FLASH ROM ERROR • Flash ROM access count over error
55
• PRG.TIME OVER
• Constant scan setting time-out error
• MULTI CPU ERROR
*2
• Another CPU error in multiple CPU systems
6 6 • PID ERROR • PID control instruction error
7 7 • Annunciator -
88 - -
99•BATTERY ERROR -
10 A - -
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.
SD20 SD20 SD20
00A987654301
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