Programmer (HHP) User guide

Chapter 8
Using Basic Instructions
8–16
Use the TON instruction to delay the turning on or off of an output. The
TON instruction begins to count timebase intervals when rung conditions
become true. As long as rung conditions remain true, the timer increments
its accumulated value (ACC) each scan until it reaches the preset value
(PRE). The accumulated value is reset when rung conditions go false,
regardless of whether the timer has timed out.
Using Status Bits
This Bit Is Set When
And Remains Set Until One
of the Following
Timer Done Bit DN (bit 13)
accumulated value is equal to
or greater than the preset value
rung conditions go false
Timer Enable Bit EN (bit 14) rung conditions are true rung conditions go false
Timer Timing Bit TT (bit 15)
rung conditions are true and
the accumulated value is less
than the preset value
rung conditions go false or
when the done bit is set
Entering the Instruction
You enter the instruction from within the program monitor functional area.
P
0 0 0 T O N A D D R
T 0
P
0 0 0 T O N P R E
* * * 1 0 0
P
0 0 0 T O N A C C
* * * 0 6 6
P
0 0 0 T O N B A S E
0 . 0 1 S E C
TIMER ON DELAY
Timer T4:0
Time Base 0.01
Preset 100
Accum 66
(EN)
(DN)
TON
Execution Times (µ sec) when:
True False
38.34 30.38
Ladder representation:
Tim
e
r
On-
De
la
y (
T O
N)
FUN
ANB
0
ENT
To enter the function code, press: