Mitsubishi Electric MELSEC iQ-R Series - Page 577

36 ERROR CODES
36.4 List of Error Codes
575
36
24D0H System bus
error
• The extension level setting of the Q
series extension base unit is
overlapping with that of any other
extension base units.
• An unsupported base unit is
connected.
• Incorrect connections of the extension
cables have been detected in the
redundant extension base unit.
• An error was detected on the system
bus.
Stop • Check and correct the level setting
of the Q series extension base
unit.
• Check the connection status of the
extension cable.
• Check that the 10m mark is
printed on the base unit connected
when using the ten-meter
extended cables (RC100B). (
MELSEC iQ-R Module
Configuration Manual)
• Disconnect the unsupported base
unit.
• Check the detailed information
(system configuration information)
of the error by executing module
diagnostics using the engineering
tool and identify the extension
cables incorrectly connected.
Connect the OUT1 connector to
the IN1 connector of the next
level, and connect the OUT2
connector to the IN2 connector of
the next level.
• 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.
System
configuration
information
Always
24E0H System bus
error
• An error was detected on the system
bus.
Stop • Take measures to reduce noise.
• Check the mounting status and
reset status of the CPU modules
other than CPU No.1.
• 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.
System
configuration
information
Always
2500H WDT error • 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.
Stop • Check the detailed information
(time information) of the error by
executing module diagnostics
using the engineering tool, check
the time setting, and take the
following actions:
(1) Check and correct the program
so that it can be executed within
the execution monitoring time set
in parameter.
(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.
Time
information
Always
2501H • The scan time exceeded the
execution monitoring time set in
parameter.
• The 2nd or later 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.
Error
code
Error name Error details and cause Stop/
continue
Action Detailed
information
Diagnostic
timing