5.7 Sfc Programs; Starting And Stopping Sfc Programs - Mitsubishi Electric A173UHCPU Programming Manual

5. SEQUENCE PROGRAMS AND SFC PROGRAMS

5.7 SFC Programs

5.7.1

Starting and stopping SFC programs

This section explains how to start servo programs using SFC programs.
SFC programs are started and stopped from the main sequence program. The
methods for starting and stopping SFC programs are described below.
(1) Starting SFC programs
(a) An SFC program is started by turning M9101 (SFC program start/stop) ON
in the main sequence program.
Start command
M0
(b) There are two types of SFC program start, as indicated below, and the one
that is effective is determined by the ON/OFF status of special relay M9102
(SFC program start status selection).
1) SFC program initial start
By turning special relay M9101 ON while special relay M9102 is OFF, the
SFC program is started from the initial step of block 0.
2) SFC program resumptive start
By turning special relay M9101 ON while special relay M9102 is ON, the
SFC program is started from the block and step that was being executed
immediately before operation was stopped.
(c) On creation of an SFC program, if no main sequence program has been
created (applies only when step 0 is an END instruction), the circuit shown
below is automatically created in the main sequence program area by the
peripheral device.
M9036
(2) Stopping SFC programs.
(a) An SFC program is stopped by turning M9101 (SFC program start/stop)
OFF in the main sequence program.
Stop command
M1
(b) When an SFC program is stopped, all the operation outputs in the step
being executed are turned OFF.
POINT
Write during run in the SFC mode is not possible with respect to the motion
controller.
PLS M0
SET M9101
SET
PLS
RST
5 − 16
M9101
M1
M9101