Siemens Logo! Manual page 187

Functional description
The threshold trigger measures the signals at input Fre.
The pulses are recorded across a configurable time G_T.
Output Q is set and reset in accordance with the set thresh-
olds. See the calculation rule below.
Calculation rule
S
If the On threshold
Q = 1, if f
Q = 0, if f
S
If the On threshold < Off threshold, then Q = 1 if
On
Preset of the Par parameter
Note
The system scans the counter limit value once per interval
G_T.
View in programming mode (example):
B15
On =0009
Off =0005
Press
B15
G_T=01:00s
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> On
a
Off.
a 
f < Off.

a
1+
2
Off threshold, then:
Parameter protection mode
On threshold
Off threshold
Time interval for pulses
(example)
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