GE VersaMax PLC

10.9.1.1 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.
10.9.1.2 Operation of the On Delay Timer Function
A
B
C
D
E
F
G
H
a42931
ENABLE
RESET
Q
A. ENABLE goes high; timer starts accumulating
B. Current value reaches preset value PV; Q goes high
C. RESET goes high; Q goes low, accumulated time is reset (CV=0)
D. RESET goes low; timer then starts accumulating again
E. ENABLE goes low; timer stops accumulating. Accumulated time stays the
same
F. ENABLE goes high again; timer continues accumulating time
G. Current value becomes equal to preset value PV; Q goes high. Timer
continues to accumulate time until ENABLE goes low, RESET goes high or
current value becomes equal to the maximum time
H. ENABLE goes low; timer stops accumulating time.
186 GFK-1503E VersaMax PLC User Manual
For public disclosure