Siemens Simatic S7 Series

Program instructions
7.6 Counters
S7-200 SMART
222 System Manual, 09/2015, A5E03822230-AC
Clock A
Dir / Clock B
Reset
Single phase max.
clock / input rate
Dual phase / AB quadrature phase max.
clock / input rate
HSC0 I0.0 I0.1 I0.4 200 kHz (S model CPUs)
1
100 kHz (C model CPUs)
2
S model CPUs:
100 kHz = Maximum 1x count rate
400 kHz = Maximum 4x count rate
C model CPUs:
50 kHz = Maximum 1x count rate
200 kHz = Maximum 4x count rate
HSC1 I0.1 200 kHz (S model CPUs)
100 kHz (C model CPUs)
HSC2 I0.2 I0.3 I0.5 200 kHz (S model CPUs)
100 kHz (C model CPUs)
S model CPUs:
100 kHz = Maximum 1x count rate
400 kHz = Maximum 4x count rate
C model CPUs:
50 kHz = Maximum 1x count rate
200 kHz = Maximum 4x count rate
HSC3 I0.3 200 kHz (S model CPUs)
100 kHz (C model CPUs)
1
S model CPUs: SR20, ST20, SR30, ST30, SR40, ST40, SR60, ST60
2
C model CPUs: CR40, CR60
HSC counting mode support
● A total of four HSC devices can be used (HSC0, HSC1, HSC2, and HSC3)
● HSC0 and HSC2 support eight counter modes (mode 0, 1, 3, 4, 6, 7, 9, and 10)
● HSC1 and HSC3 can only support one counter mode (mode 0)
Available HSC counter types
● Single-phase clock counter with internal direction control
– Mode 0:
– Mode 1: with external reset
● Single-phase clock counter with external direction control
– Mode 3:
– Mode 4: with external reset
● Two-phase clock counter with 2 clock inputs (clock-up and clock-down)
– Mode 6:
– Mode 7: with external reset
● AB quadrature phase counter
– Mode 9:
– Mode 10: with external reset