Delta AS Series Programming Manual page 276

Instruction code
PN
Symbol
Explanation
1. When the value in the accumulative register switches from 1 to 0, the PN instruction keeps the value 1 in the
accumulative register for a scan cycle. After the second scan cycle is finished, the value in the accumulative register
changes to 0.
2. Use the FB_ PN instruction in function blocks.
Example
Instruction
LD M0
AND M1
PN
OUT Y0.0
Timing diagram
M0
M1
Y0 .0
Operand
-
Operation
Contact A of M0 is loaded.
Contact A of M1 is connected in series.
The circuit is falling edge-triggered.
The coil Y0.0 is driven.
One scan cycle
One scan cycle
C ha pt er 5 Bas ic I ns t r uc t i ons
Function
Triggering the circuit on the falling edge.
5_
5 - 1 9