User manual

Instruction Set

Counter 3-7

Counter Instructions

Instruction Description

Count Up

CTU

Status Bits:

CU-Count Up

CD-Count Down

DN-Count Done

OV-Overflow

UN-Underflow

If the input conditions go true, counter C5:1 starts counting, incrementing by 1 every time the

rung goes from false-to-true. When the accumulated value is greater than or equal to the preset

value (10), the counter sets the counter done bit.

COUNT UP

Counter C5:1

Preset 10

Accum 0

CTU

Rung

Condition

ACC

Value

CTU

Status

False 0000 Reset

Toggle True 1 0 0 incr by 1 Counting

True 1 1 0 >=preset Done

True 1 1 1 >32767 Overflow