Mitsubishi Electric MELSEC-Q Series User Manual page 128

7 FUNCTION
Self-Diagnosis List (Continued from the preceding page)
Diagnosis description
Instruction code check
No END instruction
Pointer setting error
Pointer setting error
Program error
Operation check error (Default...
Stop)
FOR to NEXT instruction structure
error
CALL to RET instruction structure
error
Interrupt program error
Watchdog error supervision
PLC error
Program time exceeded
Annunciator check
1:Can be changed to "continues" in the GX Developer function parameter setting.
7 - 32
1
Error message
INSTRUCT CODE.ERR.
MISSING END INS.
CAN´T SET(P)
CAN´T SET(I)
OPERATION ERROR
FOR NEXT ERROR
CAN´T EXECUTE(P)
CAN´T EXECUTE(I)
WDT ERROR
PRG.TIME OVER
F
Diagnostic timing
• When the power is turned on/when reset
• When switched from STOP to RUN
• When the power is turned on/when reset
• When switched from STOP to RUN
• When the power is turned on/when reset
• When switched from STOP to RUN
• When the power is turned on/when reset
• When switched from STOP to RUN
When an instruction is executed
When an instruction is executed
When an instruction is executed
When an instruction is executed
Always
Always
When an instruction is executed
MELSEC-Q
7 - 32