Mitsubishi Electric MELSEC iQ-R Series - Page 576

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36 ERROR CODES
36.4 List of Error Codes
24C3H System bus
error
• An error was detected on the system
bus.
Stop ■CPU 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, base unit, extension
cable, or module (I/O module or
intelligent function module)
connected. Please consult your
local Mitsubishi representative.
■Redundant function module
• The possible cause is malfunction
due to noise. Take measures to
reduce noise by checking the
distance of wires and cables, and
the grounding status of each
device.
• Execute a module communication
test. If the same error code is
displayed again, the possible
cause is a hardware failure of the
redundant function module.
Please consult your local
Mitsubishi representative.
System
configuration
information
At module
access
24C4H System bus
error
• An error was detected on the system
bus.
Stop • 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
base unit, extension cable, or
module (I/O module or intelligent
function module) connected.
Please consult your local
Mitsubishi representative.
System
configuration
information
At module
access
24C5H 
24C6H System bus
error
• An error was detected on the system
bus.
Stop ■CPU 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 or extension cable.
Please consult your local
Mitsubishi representative.
■Redundant function module
• The possible cause is malfunction
due to noise. Take measures to
reduce noise by checking the
distance of wires and cables, and
the grounding status of each
device.
• Execute a module communication
test. If the same error code is
displayed again, the possible
cause is a hardware failure of the
redundant function module.
Please consult your local
Mitsubishi representative.
 At module
access
24C8H System bus
error
• An error was detected on the system
bus.
Stop • 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.
 At power-on, at
RESET
Error
code
Error name Error details and cause Stop/
continue
Action Detailed
information
Diagnostic
timing