Output Mode At Block Stop - Mitsubishi Electric MELSEC-Q Series Programming Manual

Output mode at block STOP

The "output mode at block STOP" is designed to set whether the coil outputs turned ON by the OUT instruction will be held at
the time of a stop (coil output held) or all coil outputs will be forcibly turned OFF (coil output OFF) when the corresponding
block is stopped temporarily.
Stop the corresponding block temporarily using the "stop RESTART bit" of the SFC information devices or the "block STOP
instruction (PAUSE BLm)" of the SFC control instructions.
Settings and corresponding operations
Set the output mode at block STOP in the "output mode at block STOP in PLC parameter dialog box" or the "special register
for setting operation output at block STOP (SM325)".
The operation of the SFC program changes depending on the combination of the "output mode at block STOP in PLC
parameter dialog box" setting and the SM325 setting.
Setting of Operation
Output Mode Output at
at Block Stop Block Stop
in PLC (SM325)
Parameter
Turns OFF OFF
(coil output OFF) (coil output OFF)
Remains ON
(coil output held)
Remains ON ON
(coil output held) (coil output held)
*1 The held step indicates the step whose attribute has been set to the HOLD step (SC, SE, ST) and which is being held with the transition
condition satisfied.
■Output mode at block STOP in PLC parameter dialog box
Set the status of the output mode at block STOP when the programmable controller is powered ON or the CPU module is
reset.
Status of Operation
STOP-time
Active step other than
Mode Bit
held step (including
HOLD step (SC, SE, ST)
whose transition
condition is not
satisfied)
OFF or no • Immediately after a STOP
setting request is made, the coil
(immediate output of the operation
stop) output is turned OFF and the
block is stopped.
• The status remains active.
ON • Normal operation is
(STOP after performed until the transition
transition) condition is satisfied.
• When the transition
condition is satisfied, the end
processing of the
corresponding step is
performed. At the same
time, the transition
destination step becomes
active and the block stops
immediately.
OFF or no • Immediately after a STOP
setting request is made, the block is
(immediate stopped with the coil output
stop) of the operation output being
held.
• The status remains active.
ON • Normal operation is
(STOP after performed until the transition
transition) condition is satisfied.
• When the transition
condition is satisfied, the end
processing of the
corresponding step is
performed. At the same
time, the transition
destination step becomes
active and the block stops
immediately.
*1
Held step
Coil HOLD step Operation HOLD
(SC) step (without
transition check)
(SE)
• Immediately after • Immediately after a STOP request is
a STOP request is made, the coil output of the operation
made, the coil output is turned OFF and the block is
output of the stopped.
operation output • The status remains active.
is turned OFF and
the block is
stopped.
• The status
becomes inactive.
• Immediately after a STOP request is made, the block is stopped
with the coil output of the operation output being held.
• The status remains active.
4 SFC PROGRAM CONFIGURATION
4.7 SFC Operation Mode Setting
4
Operation HOLD
step (with
transition check)
(ST)
123