Mitsubishi Q Series Programming Guide

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4 SFC PROGRAM CONFIGURATION
MELSEC-Q
4.7.3 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.
(1) 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.
Operation
Held step *
Setting of
Output Mode at
Block Stop in
PLC Paramete
Operation
Output at
Block Stop
(SM325)
Status of
STOP-time
Mode Bit
Active step other than held step
(including HOLD step (SC, SE, ST) whose
transition condition is not satisfied)
Coil HOLD step (SC)
Operation HOLD
step (without
transition check) (SE)
Operation HOLD
step (with transition
check) (ST)
OFF or no
setting
(immediate
stop)
• Immediately after a STOP request is made,
the coil output of the operation output is turned
OFF and the block is stopped.
• The status remains active.
• Turns OFF
(coil output
OFF)
• Remains ON
(coil output
held)
• OFF
(coil
output
OFF)
ON
(STOP after
transition)
• Normal operation is performed until the
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.
• Immediately after a
STOP request is
made, the coil
output of the
operation output is
turned OFF and the
block is stopped.
• The status
becomes inactive.
• Immediately after a STOP request is
made, the coil output of the operation
output is turned OFF and the block is
stopped.
• The status remains active.
OFF or no
setting
(immediate
stop)
• 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.
• Remains ON
(coil output
held)
• ON
(coil
output
held)
ON
(STOP after
transition)
• Normal operation is performed until the
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.
• 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.
*: 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.

Mitsubishi Q Series Specifications

General

Brand	Mitsubishi
Model	Q Series
Category	Control Unit
Language	English