GE VersaMax PLC User Manual page 186

Input/ Output
address
enable
R
PV
Q
time
186 GFK-1503E
For public disclosure
10.9.1.1 Parameters of the On Delay Stopwatch Timer
Function
Choices
The function uses three consecutive words
(registers) of %R memory to store the following:
• Current value (CV) =word 1.
• Preset value (PV) = word 2.
R
• Control word = word 3.
Do not use this address with other instructions.
Careful: Overlapping references cause erratic
timer operation.
When enable receives power flow, the timer's
flow
current value increments.
When R receives power flow, it resets the current
flow
value to zero.
I ,Q, M, T, G, R, AI, AQ,
The Preset Value, which is used when the timer
constant, none
is enabled or reset.
Output Q is energized when the current value of
flow, none
the timer is greater than or equal to the preset
value.
tenths, hundredths, or
Time increment for the low bit of the PV preset
thousandths of seconds and CV current value.
10.9.1.2 Operation of the On Delay Timer Function
ENABLE
RESET
Q
A B C
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.
Description
a42931
D E F G H
VersaMax PLC User Manual