RS Automation X8 Series, Instruction Manual

Page: 171 / 327

X8 Instruction Set Reference Manual
Timer and Counter Instructions 8 - 5
TON - Timer, On-Delay
Instruction Type: output
Use the TON instruction to delay turning on an output.
The TON instruction begins to count time base intervals when rung
conditions become true. As long as rung conditions remain true, the timer
increments its accumulator until the preset value is reached. When the
accumulator equals the preset, timing stops.
The accumulator is reset (0) when rung conditions go false, regardless of
whether the timer has timed out.
TON timers are reset on power cycles and mode changes.
TOF - Timer, Off-Delay
Instruction Type: output
Use the TOF instruction to delay turning off an output.
The TOF instruction begins to count time base intervals when rung
conditions become false. As long as rung conditions remain false, the timer
increments its accumulator until the preset value is reached.
The accumulator is reset (0) when rung conditions go true, regardless of
whether the timer is timed out. TOF timers are reset on power cycles and
mode changes.
Note that, all status such as status flags are opposed to the TON instruction.
Foll
o
woing figures shows the timer status from begin to done.
• If the rung condition is true, the TOF timer is not operate. Enable and Done
bits are configured different from the TON timer.
TON
EN
ENO
Timer TM9.0 -
BASE 0.01-
PRE 10 <
ACC > 0
Enable Done
TOF
EN ENO
Timer TM9.1 -
BASE
1.0 -
PRE
2 <
ACC - 0
Enable Done