Siemens SIMATIC S7-1200 Manual page 120

Programming made easy
6.6 High-speed counter (HSC)
HSC input channel selection
Use the following table and ensure that the CPU and SB input channels that you connect
can support the maximum pulse rates in your process signals.
Note
CPU and SB input channels (V4 or later firmware) have configurable input filter times
Earlier firmware versions had fixed HSC input channels and fixed filter times that could not
be changed.
V4 or later versions allow you to assign input channels and filter times. The default input filter
setting of 6.4 ms may be too slow for your process signals. The filter times for the HSC
inputs must be optimized for your HSC application. See "Configuring digital input filter times"
for details.
Table 6- 28
CPU
1211C
1212C
1214C and 1215C
1217C
Table 6- 29
SB signal board
SB 1221, 200 kHz
SB 1223, 200 kHz
SB 1223
120
CPU input: maximum frequency
CPU Input channel
Ia.0 to Ia.5
Ia.0 to Ia.5
Ia.6, Ia.7
Ia.0 to Ia.5
Ia.6 to Ib.5
Ia.0 to Ia.5
Ia.6 to Ib.1
Ib.2 to Ib.5
(.2+, .2- to .5+, .5-)
SB signal board input: maximum frequency (optional board)
SB input channel
Ie.0 to Ie.3
Ie.0, Ie.1
Ie.0, Ie.1
1 or 2 phase mode A/B Quadrature phase
mode
100 kHz 80 kHz
100 kHz 80 kHz
30 kHz 20 kHz
100kHz 80kHz
30 kHz 20 kHz
100 kHz 80 kHz
30 kHz 20 kHz
1 MHz 1 MHz
1 or 2 phase mode A/B Quadrature phase
mode
200kHz 160 kHz
200kHz 160 kHz
30 kHz 20 kHz
Manual, 03/2014, A5E02486774-AF
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