Logix5000 Controllers General Instructions - SLAC Confluence

Chapter 4Timer and Counter Instructions(TON, TOF, RTO, TONR, TOFR, RTOR, CTU, CTD, CTUD, RES)IntroductionTimers and counters control operations based on time or the numberof events.If You Want To Use This Instruction Available In These Languages See Pagetime how long a timer is enabled TON relay ladder 96time how long a timer is disabled TOF relay ladder 100accumulate time RTO relay ladder 105time how long a timer is enabled with built-inreset in function blockTONRstructured text110function blocktime how long a timer is disabled with built-inreset in function blockaccumulate time with built-in reset in functionblockTOFRRTORstructure textfunction blockstructured textfunction blockcount up CTU relay ladder 123count down CTD relay ladder 127count up and count down in function block CTUD structured text131function blockreset a timer or counter RES relay ladder 136114118The time base for all timers is 1 msec.95 Publication 1756-RM003I-EN-P - January 2007