Siemens SIMATIC ET 200SP - Page 101

Using the High_Speed_Counter technology object
3.5 Configuring the High_Speed_Counter
Counting, measurement and position detection
100 Function Manual, 12/2017, A5E32009889-AG
Signal evaluation
By configuring signal evaluation (Page 72), you can specify which edges of the signals are
counted.
You can select from the following options:
Symbol
Signal evaluation
Meaning
Single (Page 72)
(default)
The edges of signal A are evaluated during a low level of
signal B.
Double (Page 73) Each edge of signal A is evaluated.
Quadruple
(Page 74)
Each edge of signals A and B is evaluated.
The parameter can be assigned with the following signal types:
● Incremental encoder (A, B phase-shifted)
● Incremental encoder (A, B, N)
Filter frequency
By configuring the filter frequency, you suppress interferences at the counting inputs A, B
and N.
The selected filter frequency is based on a pulse/break ratio of between around 40:60 and
around 60:40. This results in a specific minimum pulse/break time. Signal changes with a
duration shorter than the minimum pulse/break time are suppressed.
You can select from the following filter frequencies:
Filter frequency
Minimum pulse/break time
100 Hz
4.0ms
200 Hz
2.0 ms
500 Hz
800 µs
1 kHz
400 µs
2 kHz 200 µs
5 kHz
80 µs
10 kHz
40 µs
20 kHz
20 µs
50 kHz
8.0 µs
100 kHz (preset for Compact CPU)
4.0 µs