Mitsubishi Electric MELSEC-Q Series User Manual page 127

7 FUNCTION
Diagnosis description
CPU error
END instruction not executed
RAM check
Calculation circuit check
Fuse short (default... stop)
I/O interrupt error
Hardware failure
Intelligent function module error
Control bus error
Momentary stop occurred
Battery low
I/0 module verification (Default...
Stop)
Intelligent function module error
Intelligent function module
allocation error
Handling error
No parameter
Boot error
Instruction execution not possible
Parameter setting check
Parameter error Link parameter error
Intelligent function module
parameter error
1:Can be changed to "Continue" in the GX Developer function parameter setting.
2:Can be set to "No" in the GX Developer function parameter setting.
3:Can be set to "No" in the GX Developer function parameter setting.
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(4) Error check selection
The error checking can be set to "yes/no" in the following error checking in the
parameter mode PLC RAS setting.
(All parameter defaults are set at "Yes".)
(a) Battery check
(b) Fuse blown check
(c) I/O unit comparison
Self-Diagnosis List
1
1
Error message
MAIN CPU DOWN
END NOT EXECUTE
RAM ERROR
OPE.CIRCUIT ERR.
FUSE BRAKE OFF
I/O INT ERROR
SP.UNIT DOWN
CONTROL-BUS ERROR.
AC/DC DOWN
BATTERY ERROR
UNIT VERIFY ERROR
SP. UNIT ERROR
SP.UNIT LAY ERR.
MISSING PARA.
BOOT ERROR
CAN´T EXE.PRG.
PARAMETER ERROR
LINK PARA.ERROR
SP.PARA.ERROR
Diagnostic timing
• Always
• When the END instruction is executed
• When the power is turned on/when reset
• When the power is turned on/when reset
• When the END instruction is executed
2
(Default... Yes)
• When an interrupt occurs
• When the power is turned on/when reset
• When the FROM/TO instruction is executed
• When the power is turned on/when reset
• When the END instruction is executed
• When the FROM/TO instruction is executed
• Always
3
• Always (Default...Yes)
• When the END instruction is executed
2
(Default... Yes)
• When an instruction is executed
• When the power is turned on/when rest
• When switched from STOP to RUN
• When the power is turned on/when rest
• When the power is turned on/when rest
• When the power is turned on/when reset
• 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
MELSEC-Q
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