User guide

Chapter 20

Math Instructions

20–3

Add ADD Output Instruction

ADD

Source A N7:0

879

Source B N7:1

2150

Dest N7:2

3029

(ADD)

F1 F2 F3 F4 F5

ZOOM on ADD –(ADD)– 2.3.0.0.2

NAME: ADD

SOURCE A: N7:0 879

SOURCE B: N7:1 2150

DEST: N7:2 3029

EDT_DAT

HHT Ladder Display:

HHT Zoom Display:

Ladder Diagrams and APS Displays:

(online monitor mode)

The value at source A is added to the value at source B and then stored in the

destination.

Using Arithmetic Status Bits

C set if carry is generated; otherwise reset

V set if overflow is detected at destination; otherwise reset. On overflow,

the minor error flag (S:5/0) is also set. The value – 32,768 or 32,767 is

placed in the destination. Exception: If you are using a Series C or later

SLC 5/02 processor and have the Math Overflow Selection Bit S:2/14 set,

then the unsigned, truncated overflow remains in the destination.

Z set if the result is zero; otherwise reset

S set if the result is negative; otherwise reset

Math Register

Contents unchanged.

Add (ADD)