Cutler-Hammer D320 PLC, User Manual

Page: 102 / 258

90
D320 PLC User's Manual
Instruction
Mnemonic Timer Range
■
Bit
Word
TOF Off delay timer
Double words
Ladder
While the input is On, the timer output is On. For t seconds (t =
SV
×
time base) after the input turns Off, the output stays On.
Unlike the TIM and SST instruction, in which the PV counts up
from 0, the timer elapsed value (PV) decreases from SV when
the input is turned Off until it reaches 0.
If the input is turned On again before the output turns Off, the
output is maintained On.
Available channels are Ch 0 through Ch 255 (256 channels) and
Set Value (SV) is from 0 to 65,535.
Example
Program Expression Time Chart
In
t sec t sec
Out
TOF
T CH =
SV =
R000.0
TC100
TOF
T CH = 100
SV = 50
M2.0
(OUT)
R000.0
5 sec
TC100