Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual page 743

Error Error name Error details and cause
code
31B1H SFC program • A non-existent SFC program step
block, step was specified.
specification
error
31B2H SFC program • The specified step exceeds the
block, step range that can be used in the SFC
specification program.
error
31B3H SFC program • The number of simultaneous
block, step active block steps that can be
specification specified in the SFC program
error exceeds the permissible value.
31B4H • The total number of simultaneous
active steps that can be specified
in the SFC program exceeds the
permissible value.
31B5H • A SET Sn/BLm/Sn and RST Sn/
BLm/Sn instruction were specified
for the self step in the step
operation output.
Stop/ Action
continue
Stop • Check the detailed information (error
location information) of the error by
executing module diagnostics using
the engineering tool, display the error
program (step) by clicking the [Error
Jump] button, and correct the program.
• Turn on SM321 (Start/stop SFC
program) if it is off.
• Check the SFC program has existed.
• Check the execution status of the SFC
program.
Stop • Check the detailed information (error
location information) of the error by
executing module diagnostics using
the engineering tool, display the error
program (step) by clicking the [Error
Jump] button, and correct the program.
• Turn on SM321 (Start/stop SFC
program) if it is off.
Stop • Check the detailed information (error
location information) of the error by
executing module diagnostics using
the engineering tool, display the error
program (step) by clicking the [Error
Jump] button, and correct the program.
Detailed Diagnostic
information timing
Error location At instruction
information execution, at
SFC program
execution
Error location At instruction
information execution
Error location At instruction
information execution, at
SFC program
execution
At instruction
execution, at
SFC program
execution
At instruction
execution
APPX
741
Appendix 1 Error Codes
A