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How to Use the Step Ladder Program Block
Appendix 1
211
: Can be used
: Cannot be used
Command
Command
code
Ladder symbol
Operand
Description
Input
conditions
In logic
sequence
In step
sequence
JUMP
25
JUMP
Block
address/
step number
When the input conditions
turn ON, execution of the
program jumps to the
specified step 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).
Required
STEP
TIMER
27
STEP TIMER
Timer
setting value
This is the timer (setting
range: 0 to 9999 sec) for
moving between steps. It
has no input conditions.
(STEP TIMER is placed in
the same line as the STEP
command.)
Operation is started when
program execution moves to
the line containing the STEP
command.
When the time set by STEP
TIMER is reached, the
program execution moves to
the next step.
Note: "Input condition
commands" are
given top priority.
Not required
ALARM
TIMER
28
ALM TIMER
Timer
setting value
This is the timer (setting
range: 0 to 9999 sec) for
monitoring steps. It has no
input conditions.
(ALARM TIMER is placed in
the same line as the STEP
command.)
Operation is started when
program execution moves to
the line containing the STEP
command.
When the time set by
ALARM TIMER is reached,
the Step Timer Completion
flag (step congestion
indicator) turns 1 (ON).
At this time, the step is held
at the current values.
Not required