Chapter

3

Timer and Counter Instructions

(TON, TOF, RTO, TONR, TOFR, RTOR, CTU, CTD, CTUD, RES)

Introduction

time how long a timer is disabled with built-in reset in function block accumulate time with built-in reset in function block count up count down count up and count down in function block reset a timer or counter

Timers and counters control operations based on time or the number of events.

If You Want To

time how long a timer is enabled time how long a timer is disabled accumulate time time how long a timer is enabled with built-in reset in function block

Use This Instruction

TON

TOF

RTO

TONR

TOFR

RTOR

CTU

CTD

CTUD

Available In These Languages

relay ladder relay ladder relay ladder structured text function block structure text function block structured text function block relay ladder relay ladder structured text function block relay ladder RES

The time base for all timers is 1 msec.

See Page

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103 Publication 1756-RM003K-EN-P - July 2008

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