Mitsubishi Electric MELSEC-Q Series Programming Manual page 180

Number Name
SM329 Online change
(inactive block) status
flag
SM331 Normal SFC program
execution status
SM332 Program execution
management SFC
program execution
status
SM735 SFC comment readout
instruction in execution
flag
*1 Available with the CPU module whose function version is B or later
*2 Available with the CPU module whose serial number (first five digits) is "04122" or later
*3 Available with the CPU module whose serial number (first five digits) is "07012" or later
*4 Available with the CPU module whose serial number (first five digits) is "07032" or later
*5 Available with the Universal model QCPU other than the Q00UJCPU, Q00UCPU, Q01UCPU, and Q02UCPU, whose serial number (first
five digits) is "12052" or later. Available with the LCPU other than the L02SCPU, L02SCPU-P, L02CPU, and L02CPU-P, whose serial
number (first five digits) is "15102" or later.
APPENDICES
178
Appendix 1 Special Relay and Special Register List
Meaning Explanation
OFF: Not executed This relay indicates the
ON: Being executed execution status of online
change (inactive block).
• Indicates whether the
normal SFC program is
being executed or not.
• Used as an execution
interlock of the SFC
control instruction.
• Indicates whether the
program execution
management SFC
program is being
executed or not.
• Used as an execution
interlock of the SFC
control instruction.
OFF: SFC comment Turns on the instructions,
readout instruction is (S(P).SFCSCOMR) to read
inactivated. the SFC step comments and
ON: SFC comment (S(P). SFCTCOMR) to read
readout instruction is the SFC transition condition
activating. comments.
Set by Corresponding CPU
(When set)
(1) (2)
 
S (Status change)
 
*2
 
*3
(3) (4) (5)
  
*5
  
*4
  
*4 *4 *5