User Manual
Chapter 10
GFK-1503F
Jan 2020
Instruction Set Reference
166
Figure 157
When the Current Value equals or exceeds the Preset Value PV, output Q is energized. As
long as the timer continues to receive power flow, it continues accumulating until the
maximum value is reached. Once the maximum value is reached, it is retained and output Q
remains energized regardless of the state of the enable input.
If multiple occurrences of the same timer with the same reference address are enabled
during a CPU sweep, the current values of the timers will be the same.
Parameters of the On-Delay Stopwatch Timer Function
Input/
Output
Choices
Description
address
R
The function uses three consecutive words (registers) of %R
memory to store the following:
•
Current value (CV)
=word 1.
•
Preset value (PV)
= word 2.
•
Control word = word 3.
Do not use this address with other instructions.
Careful: Overlapping references cause erratic timer
operation.
enable
flow
When enable receives power flow, the timer’s Current Value
increments.
R
flow
When R receives power flow, it resets the Current Value to
zero.
PV
I ,Q, M, T, G, R, AI, AQ,
constant, none
The Preset Value, which is used when the timer is enabled or
reset.
Q
flow, none
Output Q is energized when the current value of the timer is
greater than or equal to the Preset Value.
time
tenths, hundredths, or
thousandths of seconds
Time increment for the low bit of the PV preset and CV
current value.