Automating Manufacturing Systems - Process Control and ...

plc function ref - 34.9
TON - Timer ON
A
Description:
Status Bits:
Registers:
TON
TIMER ON DELAY
Timer T4:0
Time Base 1.0
Preset 10
Accum. 0
This timer will delay turning on, but will turn off immediately. Once the
input turns on the accumulated value (ACC) will start to increase from
zero. When the preset (PRE) value is reached the DN bit is set. The done
bit will turn off and the accumulator will reset to zero if the input goes
false.
EN
TT
DN
ACC
PRE
Available on: Micrologix, PLC-5
This bit is true while the input to the timer is true
This bit is true while the accumulator value is increasing
This bit is true when the accumulator value is equal to the preset
value
The time that has passed since the input went true
The maximum time delay before the timer goes on