29
2
3
4
5
6
7
8
2.3
S
eq
uence
Instr
uctions
2.3.1
C
ontact instru
ctions
2.3
Sequence Instructions
2.3.1
Contact instructions
*1:
The number of steps may vary depending on the device being used.
Category
Instru
ctio
n Sym
bol
Symbol
Processing Details
Execution
Condition
Num
b
er o
f Basic
S
tep
s
Sub
set
See f
o
r Descrip
tio
n
Contact
LD
• Starts logic operation
(Starts a contact logic operation)
*1
LDI
• Starts logical NOT operation
(Starts b contact logic operation)
AND
• Logical product (a contact series connection)
ANI
• Logical product NOT (b contact series
connection)
OR
• Logical sum (a contact parallel connection)
ORI
• Logical sum NOT (b contact parallel
connection)
LDP
• Starts leading edge pulse operation
*1
LDF
• Starts trailing edge pulse operation
ANDP
• Leading edge pulse series connection
ANDF
• Trailing edge pulse series connection
ORP
• Leading edge pulse parallel connection
ORF
• Trailing edge pulse parallel connection
LDPI
• Starts leading edge pulse NOT operation
3
*2
LDFI
• Starts trailing edge pulse NOT operation
3
*2
ANDPI
• Leading edge pulse NOT series connection
4
*2
ANDFI
• Trailing edge pulse NOT series connection
4
*2
ORPI
• Leading edge pulse NOT parallel connection
4
*2
ORFI
• Trailing edge pulse NOT parallel connection
4
*2
Device
Number of Steps
Internal device, file register (R0 to R32767)
1
Direct access input (DX)
2
Devices other than above
3