How to Use the Step Ladder Program Block
Command
Command
code
OUT
11
OUT NOT
12
SET
13
RESET
14
DIFU
15
DIFD
16
208
Ladder symbol
Operand
Write
destina-
tion block
address/
ITEM
number
Write
destina-
tion block
address/
ITEM
number
Write
destina-
tion block
address/
ITEM
(
)
S
number
Write
destina-
tion block
address/
ITEM
(
)
R
number
Write
destina-
tion block
(
)
DU
address/
ITEM
number
Write
destina-
tion block
(
)
DD
address/
ITEM
number
Description
Outputs the result
(execution condition) of
logical processing: 0
(OFF) at condition 0
(OFF), and 1 (ON) at
condition 1 (ON).
Outputs the result
(execution condition) of
logical processing: 1
(ON) at condition 0
(OFF), and 0 (OFF) at
condition 1 (ON).
SET turns the operand
bit 1 (ON) when the
execution condition is 1
(ON), and does not
affect the status of the
operand bit when the
execution condition is 0
(OFF). Use RESET to
turn OFF a bit that has
been turned ON with
SET.
RESET turns the
operand bit 0 (OFF)
when the execution
condition is 1 (ON), and
does not affect the
status of the operand bit
when the execution
condition is 0 (OFF).
Use SET to turn OFF a
bit that has been turned
ON with RESET.
Outputs 1 (ON) for one
operation cycle only
when the execution
condition goes to 1 (ON)
from 0 (OFF).
Outputs 1 (ON) for one
operation cycle only
when the execution
condition goes to 0
(OFF) from 1 (ON).
Appendix 1
: Can be used
Á
:
Cannot be used
Input
conditions In logic
In step
sequence
sequence
Required
Required
Required
Required
Required
Required