Rockwell Automation AutoMax Enhanced Ladder Language Reference Manual - Manual (Page 47)

3Ć7
3.1.4 Example of an RTO Instruction
This logic shows that as long as switch1 is true
and switch2 is false, the timer increments
toward 1000. When 10 seconds have elapsed,
Q is set true, causing the variable vat.stir to be
set true. When switch2 is true, TR is set true,
which sets the elapsed value to 0 and sets Q
false. The variable vat.stir is then set false.
3.2 Timer Off Delay (TOF)
Use this instruction to disable an activity at a preset interval. When EN is false, the
instruction increments the value in Elapsed until it reaches the value you defined in
TPreset. When the value in Elapsed equals the value in TPreset, output Q goes false.
The value in Elapsed is in increments of 0.01 seconds.