Omron CS1W-LC001 Operation Manual page 230

How to Use the Step Ladder Program Block
When a single step is used as a logic sequence
The default step is STEP000. STEP000 operates at all times when the operating conditions are satisfied. This
step operates when run/stop command S1 (ITEM008) of the Step Ladder Program block turns ON.
When multiple steps are used as a step sequence
Step Ladder Program blocks can be broken up into 99 steps STEP01 to 99. Whereas STEP00 operates at all
times when the operating conditions are satisfied, one of steps STEP01 to STEP99 operates when the
operating conditions are satisfied
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A Step Ladder Program comprising STEP01 to STEP99 is called a "step sequence." Sequence control
instructions (command codes 21 to 28) such as JUMP (jump to a specified step) can be used in step
sequences.
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Movement between steps STEP01 to STEP99 is performed according to the following conditions:
1) Move to next STEP when the input conditions of the final sequence command in the previous STEP are
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satisfied 1
2) Jump to a specified step according to the JUMP command
3) Move to the next STEP (STEP+1) when the time set by the STEP TIMER command has elapsed
Movement between steps when input conditions are satisfied in this way allows step progression control to
be performed.
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1: Basically, movement between STEPs is movement to the next STEP when the input conditions of the
last sequence command are ON.
Example
Single step (normal)
STEP00
STEP 01
ST EP m ove
To next STEP
STEP 02
ITEM Command
011 01 (LOAD)
012 03 (AND)
013 07 (OUT)
014 02 (LOAD NOT)
Max. 410
Move to STEP02 w hen this input condition
turns ON.
Accordingly, the result is as if the STEP
move instruction exists virtually here.
instructi on
Appendix 1
Operand
213