LOGO! Manual
A5E00380835-01
178
4.4.15 Threshold trigger
Short description
The output is set and reset with two configurable threshold
triggers.
Symbol in
LOGO!
Wiring Description
Fre
Input Fre The function counts the 0 to 1
transitions at input Fre. 1 to 0
transitions are not counted.
Use
inputs I5/I6 for high-speed
counting (only LOGO!
12/24 RC/RCo and LOGO!
24/24o): max. 2 kHz.
any other input or circuit
component for counting low
frequency signals (5 Hz).
Parameter On: On threshold
Range of values:
0000...9999
Off: Off threshold
Range of values:
0000...9999
G_T: Time interval or gate time
during which the input
pulses are measured.
Range of values:
00:05 s...99:99 s
Output Q Q is set and reset at the
thresholds.
Timing diagram
Q
Off = 5
f
a
= 9 f
a
= 10 f
a
= 8 f
a
= 4
G_T
Fre
On = 9
f
a
= Input frequency
LOGO! functions
To Next Page
Loading...
