36 ERROR CODES
36.4 List of Error Codes
591
36
3730H Redundant
function module
communication
error
• Data communications with the
redundant function module has failed.
Stop • Check that there is no error in the
CPU module, base unit, or
redundant function module.
• 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, redundant function
module, or base unit. Please
consult your local Mitsubishi
representative.
System
configuration
information
Always
3740H Redundant
system error
• The operation mode differs between
the systems A and B. (The error is
detected in the standby system.)
Stop • Restart the standby system CPU
module.
At power-on, at
RESET, at
tracking cable
connection
3741H Redundant
system error
• Both systems were set as system A or
system B at start-up.
• The CPU module waiting for a start-
up of the other system detected that
the system A/B setting is not set to the
CPU module of the other system.
Stop • Set one system as system A and
the other system as system B by
performing online operation. Then,
restart the CPU modules in both
systems.
• Set system A or B to the CPU
module with no system setting,
and restart the CPU modules in
both systems.
• Restore the backup data including
the system A/B settings to set one
system as system A and the other
system as system B.
At power-on, at
RESET, at
tracking cable
connection
3742H Redundant
system error
• The systems were started without
system A/B setting.
Stop • Set one system as system A and
the other system as system B by
performing online operation. Then,
restart the CPU modules in both
systems. If the same error code is
displayed again, the possible
cause is a hardware failure of the
CPU module, redundant function
module, or tracking cable. Please
consult your local Mitsubishi
representative.
At power-on, at
RESET
3743H Redundant
system error
• The system setting (system A or B)
was not determined.
Stop • Set one system as system A and
the other system as system B by
performing online operation. Then,
restart the CPU modules in both
systems.
At power-on, at
RESET
3744H Redundant
system error
• Both systems are set as control
systems. (The error is detected in the
system B (control system).)
Stop • Restart the CPU module in the
system B.
At tracking
cable
connection
3745H Redundant
system error
• The systems were started with one
CPU module set to redundant mode
and the other CPU module set to
process mode.
• The systems were started in a state
where the CPU modules with
firmware versions that cannot be used
together are mounted.
• The systems were started with the
Process CPU and the SIL2 Process
CPU.
Stop • When using the CPU modules
with
firmware versions that cannot
be used together, replace either
CPU module with the one that can
be used together referring to the
MELSEC iQ-R Module
Configuration Manual. When
using the Process CPU and the
SIL2 Process CPU together,
replace either CPU module so that
the same CPU module models are
used in both systems. Then, write
a project to the CPU module in
process mode or to the one after
replacement and restart the CPU
modules in both systems.
At power-on, at
RESET
Error
code
Error name Error details and cause Stop/
continue
Action Detailed
information
Diagnostic
timing
To Next Page
Loading...
