Basic Instructions
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Description
OT↑ instructions
Output to the pulse relay takes place for one scan only following a change in the immediately previous
processing result from off to on. The pulse relay goes on for one scan only.
OT↓ instructions
Output to the pulse relay takes place for one scan only following a change in the immediately previous
processing result from on to off. The pulse relay goes on for one scan only.
Precautions during programming
When the pulse relay (P) (which goes on for one scan only due to execution of a OT↑ or OT↓ instruction) is
used with a logic instruction (
ST, AN or OR), operation is the same as a normal contact followed by DF
instruction.
Example using an
OT↑ instruction and the pulse relay (P)
P0
X0
Y10
P0
↑
Example using a DF instruction
X0
DF
Y10
Both example are executed as shown below.
X0
Y10
One scan One scan
on
off
on
off
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