Operation When An Error Occurs; How To Clear Errors; List Of Error Codes; Codes Of Errors Detected By The Self-Diagnostic Function (1000H To 3Fffh) - Mitsubishi Electric MELSEC iQ-R Series User Manual

36.2

Operation When an Error Occurs

There are two types of errors: continuation errors and stop errors.
Stop error
If a stop error occurs, the CPU module stops its operation and the operating status changes to STOP. Modules can
communicate with the CPU module even after the stop error occurs in the CPU module. The external output of each module
is controlled in accordance with the output mode setting in error. ( Page 203 CPU module operation upon error detection
setting) Besides, if the stop error occurs when the multiple CPU system is configured, the stop error target CPU module (all
CPU modules or only the corresponding CPU module) can be set in parameter. ( Page 338 Stop setting)
Continuation error
If a continuation error occurs, the CPU module continues its operation. (The operating status remains the same.)
36.3

How to Clear Errors

Continuation errors can be cleared. For the error clear method, refer to the following.
Page 208 Error Clear
• CPU module: Page 208 Error Clear
When a redundant system is configured, an error in the standby system can be cleared from the control system CPU module
by using SM1679 (Error reset (the other system)) in programs or external devices. ( Page 210 Clearing errors in the CPU
module of the standby system from the CPU module of the control system)
36.4

List of Error Codes

Codes of errors detected by the self-diagnostic function (1000H
to 3FFFH)
The following table lists error codes detected by the self-diagnostic function.
Error Error name
code
1000H Power shutoff
1010H Power shutoff
(either of the
redundant
power supply
modules)
1020H Failure (either of
the redundant
power supply
modules)
1030H Invalid power
supply module
36 ERROR CODES
552
36.2 Operation When an Error Occurs
Error details and cause
• A momentary power failure has
occurred.
• The power supply has been shut off.
• Power has been shut off or the power
supply voltage has dropped in either
of the redundant power supply
modules on the redundant power
supply base unit. Or, only one
redundant power supply module is
mounted.
• A failure has been detected in either
of the redundant power supply
modules on the redundant power
supply base unit.
• An invalid power supply module has
been mounted on the redundant
power supply base unit.
Stop/ Action
continue
Continue • Check the power supply status.
Continue • Check the power supplied to the
power supply modules on the
base unit.
• Check that two power supply
modules are mounted on the base
unit. If the same error code is
displayed again, the possible
cause is a hardware failure of the
power supply module. Please
consult your local Mitsubishi
representative.
Continue • The possible cause is a hardware
failure of the power supply
module. Please consult your local
Mitsubishi representative.
Continue • Mount only applicable power
supply modules. If the same error
code is displayed again, the
possible cause is a hardware
failure of the power supply
module. Please consult your local
Mitsubishi representative.
Detailed Diagnostic
information timing

Always
System Always
configuration
information
System Always
configuration
information
System Always
configuration
information