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

4 SFC PROGRAM CONFIGURATION

4.4.1 Step operation status check instructions (LD, LDI, AND, ANI, OR, ORI)

Internal Device
File
(System, User)
Register
R
Bit Word
S
: Only step relay (S) can be used
[When step in current block is specified]
Sn "n" is the step No.
LD Sn
Sn
Sn
LDI
AND Sn
ANI Sn
OR Sn
Sn
ORI Sn
Sn
[Functions]
(1) Checks a specified step in a specified block to determine if the step is active or inactive.
(2) The contact status changes as described below depending on whether the specified step is
inactive or active.
Inactive
Active
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Usable Devices
Link Direct
Intelligent
J
\
Function Index
Module Z
Bit Word
U \G
Sn
Sn
Expansion Data
Constant
Type
SFC Other
K, H
BLm\Sn
Device
name
[When step in another block is specified]
[When step is specified in sequence program]
LD BLm\Sn
LDI BLm\Sn
AND BLm\Sn
ANI BLm\Sn
OR BLm\Sn
ORI BLm\Sn
Contact of N/O Contact
Instruction
OFF
ON
Programs Using Instructions
SFC Program
Sequence
Program
Transition
Step
Condition
BLm\Sn
"m" is the block No., "n" is the step No.
BLm\Sn
BLm\Sn
BLm\Sn
BLm\Sn
BLm\Sn
Contact of N/C Contact
Instruction
Execution Site
Transition
Block Step
Condition
ON
OFF
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