Sfc Information Devices - Mitsubishi Electric MELSEC-Q Series Programming Manual

4.5

SFC Information Devices

This section describes the SFC information devices set in each block.
The following table lists the SFC information device types and usable devices.
SFC Information Function Outline
Devices
Block START/END bit • Device designed to forcibly start or forcibly end the specified block by a sequence program or
the test operation of the peripheral device.
• Can also be used to confirm the active status of the specified block.
Step transition bit • Device that checks whether or not a step transition occurred in the corresponding scan in the
specified block.
Block STOP/RESTART bit • Device designed to stop temporarily or restart the corresponding block that is active.
Block STOP mode bit • Device used to specify whether all steps will be immediately stopped or the block will be
stopped after the transition of the corresponding step when the block is stopped temporarily.
Continuous transition bit • Device used to specify whether the operation output of the next step will be executed within the
same scan or not when the transition condition is satisfied.
"Number of active steps" • Device that stores the number of steps currently active in the specified block.
register
: Usable
When using the SFC information devices, set them in "Property" of the target device in the SFC program.
Select the target device in the SFC program.  Right-click  [Property]
The following cannot be specified for the SFC information devices.
• Indirect designation (@)
• Digit designation (K)
• Index modification (Z)
• Word device bit designation (.)
Usable
Device
Y, M, L, F,
V, B
D, W, R,
ZR
4 SFC PROGRAM CONFIGURATION
4.5 SFC Information Devices
QCPU,
LCPU

4

105