Delta Electronics AH500, Manual

Page: 157 / 547

A H 5 0 0 M o t i o n C o n t r o l M o d u l e M a n u a l
5 - 4 2
API Instruction code Operand Function
25 D DEC P
D
Subtracting one from a
binary number
Device X Y M S K 16# F KnM KnS D W T C V Z
D
       
Pulse instruction 16-bit instruction (3 steps) 32-bit instruction (3 steps)
  
E xp la nat io n

If the instruction used is not a pulse instruction, the value in D used by
the instruction decreases by one whenever the instruction is executed.

D : Destination device

Generally, the pulse instructions DECP and DDECP are used.

If a 16-bit operation is performed, -32,768 minus 1 leaves 32,767. If a
32-bit operation is performed, -2,147,483,648 minus 1 leaves
2,147,483,647.
E xa mple

When X0.0 is turned from OFF to ON, the value in D0 decreases by one.
X0.0
D EC P D 0