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2. DETAILS OF MIGRATION FROM Q17nCPUN(-T) TO RnMTCPU
(5) Error codes system
MELSEC iQ-R series error codes are expressed with 4 hexadecimal digits (integer without
16-bit sign). There are errors detected with each module's self-diagnostic function, and
common errors detected when communicating between modules.
The error detection types and error code ranges are shown below.
Error detection type Error code range Description
Detection with each module's
self-diagnostic function
H0001 to H3FFF
These are errors such as module self-diagnostic errors
that are different for each module.
Detection when communicating
between modules
H4000 to H4FFF CPU module error
H7000 to H7FFF Serial communication module error
HB000 to HBFFF CC-Link module error
HC000 to HCFBF Ethernet module error
HD000 to HDFFF CC-Link IE field network module error
HE000 to HEFFF CC-Link IE controller network module error
HF000 to HFFFF
MELSECNET/H network module, MELSECNET/10
network module error
Errors detected at the RnMTCPU are divided into warnings and errors. The categories and
error code range of errors detected at the RnMTCPU are shown below.
Category Error code Description Remarks
Warning
H0800 to H0FFF
Warnings which do not stop
servo programs
• Equivalent to some of the Q17nCPUN(-T)
minor errors
Error
Minor H1000 to H1FFF
Errors which stop servo
programs
The CPU continues to operate
(in RUN status).
• Equivalent to some of the minor errors of
Q17nCPUN(-T), and the major errors
Minor
(SFC)
H3100 to H3BFF
Motion SFC execution errors
The CPU continues to operate
(in RUN status).
• Equivalent to Motion SFC errors of
Q17nCPUN(-T).
Moderate H2000 to H30FF
Errors that put the CPU
operation status to “During stop
error”.
• If the system parameter is set to “All
station stop by stop error of CPU No.1 to
4”, all CPUs of the whole system will be in
stop status with the specified CPU stop
error.
• Equivalent to system setting errors of
Q17nCPUN(-T).
Major H3C00 to H3FFF
• If the system parameter is set to “All
station stop by stop error of CPU No.1 to
4”, all CPUs of the whole system will be in
stop status with the specified CPU stop
error.
• Equivalent to some of the self-diagnostic
errors of Q17nCPUN(-T).
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