Delta AS Series Programming Manual page 277

A S S er i es Pr o gr am m ing Ma n ua l
Instruction code
FB_NP
Device DX
S
Data type
S
Symbol
Explanation
1. When the value in the accumulative register turns from 0 to 1, the FB_NP 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.
_5
2. The previous state of the contact is stored in the bit device S. Do not use S repeatedly in the program. Otherwise,
the wrong execution result appears.
3. Use FB_NP only in function blocks.
Example
Instruction
LD
AND
FB_NP
OUT
Timing diagram
M0
M1
Y0 .0
5 - 2 0
Operand
DY X Y


S ： For internal use
Operation
M0 Contact A of M0 is loaded.
M1 Contact A of M1 is connected in series.
D0.0 The circuit is rising edge-triggered.
Y0.0 The coil Y0.0 is driven.
One scan cycl e
S
Triggering the circuit on the rising edge.
M SM S
 
One scan cycl e
Function
T C HC D
