Parameter - Mitsubishi Electric M800 Series Manual

M800/M80/E80/C80 Series Alarm/Parameter Manual
14 Multi CPU Errors (A) [C80]
A01 System bus error
Details
An error was detected on the system bus.
Remedy
Take measures to reduce noise.
Reset the CPU module, and run it again. If the same error code is displayed again, the possible cause is
a hardware failure of the CPU module or extension cable. Please consult your local Mitsubishi representa-
tive.
A01 System bus error
Details
An error was detected on the system bus.
Remedy
Take measures to reduce noise.
Reset the CPU module, and run it again. If the same error code is displayed again, the possible cause is
a hardware failure of the extension cable, or module (I/O module or intelligent function module) connected.
Please consult your local Mitsubishi representative.
A01 System bus error
Details
The extension level setting of the Q series extension base unit is overlapping with that of any other exten-
sion base units.
An error was detected on the system bus.
Remedy
Check and correct the level setting of the Q series extension base unit.
Check the connection status of the extension cable.
Take measures to reduce noise.
Reset the CPU module, and run it again. If the same error code is displayed again, the possible cause is
a hardware failure of the CPU module, base unit, or extension cable. Please consult your local Mitsubishi
representative.
A01 System bus error
Details
An error was detected on the system bus.
Remedy
Take measures to reduce noise.
Reset the CPU module, and run it again. If the same error code is displayed again, the possible cause is
a hardware failure of the CPU module or base unit. Please consult your local Mitsubishi representative.
A01 WDT error
Details
The scan time exceeded the execution monitoring time set in parameter.
The initial (1st) scan time exceeded the execution monitoring time set in the CPU parameters.
The execution time of the fixed scan interrupt program exceeded the interrupt execution interval.
Remedy
Check the detailed information (time information) of the error by executing module diagnostics using the
engineering tool, check the time setting, and take either of the following actions.
(1) Check and correct the program so that it can be executed within the execution monitoring time set in pa-
rameter.
(2) Change the execution monitoring time setting to an appropriate value.
Check and correct the fixed scan interrupt program so that the processing completes within the interrupt
execution interval. If the same error code is displayed again, the possible cause is a hardware failure of the
CPU module. Please consult your local Mitsubishi representative.
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IB-1501279-H