Block Operation Status Check Instruction (Ld, Ldi, And, Ani, Or, Ori) - Mitsubishi MELSEC-Q Series Programming Manual

4 SFC PROGRAM CONFIGURATION

4.4.3 Block operation status check instruction (LD, LDI, AND, ANI, OR, ORI)

Internal Device
File
(System, User)
Register
R
Bit Word
S
BLm
"m" is the block No.
LD
BLm
LDI
AND
ANI
[Function]
(1) Checks whether the specified block is active or inactive.
(2) The contact status changes as described below depending on whether the specified block is
active or inactive.
Active
Inactive
(3) The contact is always OFF if the block that does not exist in the SFC program is specified.
(4) In the High-speed Universal model QCPU, the number of steps in the step activation check
instruction increases by one from that in the QnUDE(H)CPU.
REMARKS
As the "BLm" device is treated as a virtual device, the contact on the monitor of a peripheral
device does not turn ON/OFF. If the internal device is ON, the coil instruction is switched ON for
operations.
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Usable Devices
Link Direct Intelligent
J
\
Function Index
Module Z
Bit Word
U \G
BLm
BLm
Block Status
Data
Constant Expansion Other
Type
K, H SFC BLm
Device
name
OR
ORI
Contact of N/O Contact
Instruction
ON
OFF
Programs Using Instructions
SFC Program
Sequence
Block Step
Program Transition
Step
Condition
BLm
BLm
Contact of N/C Contact
Instruction
OFF
ON
Execution Site
Transition
Condition
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