Rievtech PR-12 Series, User Manual And Programmers Manual

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6.8.7 INC-W & DEC-W
Input/output Operand Data type
IN VW, IW, QW, MW, SW, SMW, AC, AIW, LW, T, C,constant, *VD, *LD, *AC Integer
OUT VW, IW, QW, MW, SW, SMW, LW, AC, T, C, *VD, *LD, *AC Integer
INC-W: IN + 1 = OUT Both input and output are 16
bits integers.
DEC-W: IN - 1 = OUT Both input and output are 16
bits integers.
The two instructions operations take with symbols
(16#7FFF > 16#8000).
In LAD and FBD
：
IN + 1 = OUT
IN - 1 = OUT
error conditions:
0006 Indirect address
SM1.1 overflow
Special memory bit:
SM1.0 Zero result
SM1.1 overflow
SM1.2 Negative result
Example: