1.2 Explanation of Relays
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1.2.10 Pulse Relays (P)
Note
Pulse relays (P) can only be used with the FP2/FP2SH/FP10SH.
Function of pulse relays (P)
A pulse relay (P) goes on for one scan only. The on or off state is not externally output
and only operates in the program.
A pulse relay only goes on when a leading edge start instruction (OT↑) or a trailing edge
start instruction (OT↓) is executed.
When used as the trigger, a pulse relay only operates during one scan when leading
edge or trailing edge is detected.
Example 1: Differential execution when input X0 rises
X0
P0
P0
Y10
↑
X0
P0
Y10
One scan
Example 2: Differential execution when input X1 falls
X1
P1
P1
Y11
↓
X1
P1
Y11
One scan
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