Siemens LOGO!, Manual

Page: 198 / 534

LOGO! functions
4.4 Special functions list - SF
LOGO!
198
Manual, 04/2011, A5E03556174-01
4.4.14 Stopwatch (0BA7 only)
Short description
The stopwatch function counts the elapsed time between a start stopwatch signal and a stop
stopwatch signal.
Symbol in LOGO! Wiring Description
En A signal at input En begins counting elapsed time at
analog output AQ.
Lap A positive edge (0 to 1 transition) at input Lap pauses
the stopwatch.
A negative edge (1 to 0 transition) at input Lap
resumes the stopwatch.
R A signal at input R resets the elapsed time.
Parameter You can set a timebase TB for the stopwatch.
Possible timebase settings:
10 ms, s, m, and h
Retentivity:
/ = No retentivity
R = The status is retentive
$4
6:
(Q
/DS
5
3DU
Output AQ A signal at input Lap holds the value of AQ until Lap
is reset to 0. A signal at input R resets the value of
AQ to 0.
Parameters TB
You can set a timebase from the following timebase set:
●
10 ms (10 milliseconds)
● s (seconds)
● m (minutes)
● h (hours)