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Creating Step Ladder Program Instructions
Command
Icon
SET
RESET
DIFU
DIFD
STEP
BLOCK
SET
BLOCK
RESET
JUMP
192
Select
Select
Operand
Operand
Mode
Mode
menu
menu
SET
Write des-
SET turns the operand bit 1 (ON) when the
tination
execution condition is 1 (ON), and does not
block ad-
affect the status of the operand bit when the
dress/ITEM
execution condition is 0 (OFF). Use RESET to
number
turn OFF a bit that has been turned ON with
SET.
RESET
Write des-
RESET turns the operand bit 0 (OFF) when the
tination
execution condition is 1 (ON), and does not
block ad-
affect the status of the operand bit when the
dress/ITEM
execution condition is 0 (OFF). Use SET to turn
number
OFF a bit that has been turned ON with RE-
SET.
DIFU
Write des-
Outputs 1 (ON) for one operation cycle only
tination
when the execution condition goes to 1 (ON)
block ad-
from 0 (OFF).
dress/ITEM
number
DIFD
Write des-
Outputs 1 (ON) for one operation cycle only
tination
when the execution condition goes to 0 (OFF)
block ad-
from 1 (ON).
dress/ITEM
number
STEP
Step number
STEP declares the step number, and has no
input conditions (is a direction connection to the
bus).
Any numbers in the range 00 to 99 are used as
the step number, and are placed in ascending
order.
1) Logic sequence: The step number is fixed at
00, and is functional at all times. Declaration of
step number 00 can be omitted.
2) Step sequence: When the step number is
within the range 01 to 99, only one of the steps
is functional. When the program is started, step
number 01 is functional.
BLOCK
Block ad-
When the input conditions turn ON, operation
SET
dress/step
of the specified step number of the Step Ladder
number
Program block at the specified block address
(400 to 499) is started.
Run/stop command S1 of the specified block
turns automatically 1 (ON). Operation of cur-
rently executing steps in already operating Step
Ladder Program blocks is interrupted, and
execution of the program jumps to the specified
step.
BLOCK
Block ad-
When the input conditions turn ON, operation
RESET
dress
of the Step Ladder Program block is stopped at
the specified block address (400 to 499).
Run/stop command S1 of the specified block
automatically turns 0 (OFF).
JUMP
Block ad-
When the input conditions turn ON, execution
dress/step
of the program jumps to the specified step
number
number (01 to 99) of the Step Ladder Program
block at the specified block address (400 to
499).
• To specify a jump to the self step number, set
the block address to 000.
• When a jump is made to another Step Ladder
Program block, run/stop command S1 of the
source block automatically turns 0 (OFF), and
run/stop command S1 of the destination block
turns 1 (ON).
Description
Section
3-7
O: Can be used
–: Cannot be used
In logic se-
In step se-
quence
quence
O
O
O
O
O
O
O
O
O
O
---
O
---
O
–
O
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