Sfc Information - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

SFC information

The following is a list of special relay areas relating to SFC information.
No. Name
SM320 Presence/absence of SFC
program
SM321 Start/stop SFC program
SM322 SFC program start status
SM323 Presence/absence of
continuous transition for
entire block
SM324 Continuous transition
prevention flag
SM325 Output mode at block stop
SM326 SFC device/label clear
mode
APPX
808
Appendix 4 List of Special Relay Areas
Data stored Details
Off: No SFC program • This relay switches to on if an SFC
On: SFC program
Off: SFC program not • The same value as SM320 is set for the
executed (stop)
On: SFC program
executed (start) • SFC program execution is stopped if this
• If this relay switches off before SFC
Off: Initial start • If the SFC program start mode in the
On: Resumption
Off: No continuous • Sets whether there is a continuous
transition
On: Continuous transition
• No continuous transition when off.
• There is no effect on operation for blocks
Off: When transition • This relay switches to off during operation
executed
On: When there is no
transition
• The relay is always on during operation in
Off: Off • Selects whether to retain coil output for
On: Hold
• The default value when the output mode
• All coil outputs are turned off when off.
Off: Device/label clear • Select the device status (all devices and
On: Device/label retain
• This relay is valid only when an SFC
• This relay is valid not only when an SFC
• When the Process CPU is used, only
program has been registered, and
switches to off if it has not.
default value. (This relay automatically
turns on if there is an SFC program.)
relay switches from on to off, and
execution is restarted when it switches
from off to on.
program processing, execution of the
SFC program is not started.
parameters is off for initial start, off is set
for the default, and if resumption, on is
set.
transition for blocks for which no SFC
information device continuous transition
bit has been set.
Continuous transition when on.
for which the continuous transition bit has
been set.
in modes with continuous transition, or
during continuous transition, and switches
to on when it is not a continuous
transition.
modes with no continuous transition.
active steps during block stoppages.
for block stoppages in the parameters is
coil output off is off, and on when coil
output is retained.
Coil outputs are retained when on.
labels (including latch labels) excluding
step relay (S)) when the CPU module
status changes from STOP  program
write  RUN.
program exists after program writing.
program is written, but also when the
program file and the parameter file are
written.
labels are cleared at the program writing
to the programmable controller after data
are rebuilt even though this relay is on.
Set by (setting timing) CPU
S (Initial) Rn
RnP
S (Initial)/U Rn
RnP
S (Initial)/U Rn
RnP
U Rn
RnP
S (Status change) Rn
RnP
S (Initial)/U Rn
RnP
U Rn
RnP
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1
*1