Siemens SIMATIC S7-200 - High-Speed Counters HSC0, HSC3, HSC4, HSC5; High-Speed I;O

CPU and Input/Output Configuration
6-10
S7-200 Programmable Controller System Manual
A5E00066097-02
6.6 High-Speed I/O
Your S7-200 CPU provides high-speed I/O for controlling high-speed events. For
more information about the high-speed I/O provided by each CPU, refer to the
specifications in Appendix A.
High-Speed Counters
The S7-200 CPUs provide integrated high-speed counter functions that count
external events at rates up to 20 kHz without degrading the performance of the
CPU. Each of the high-speed counters is described below:
• HSC0 and HSC4 are versatile counters that can be configured for one of eight
different counting modes of operation, including single-phase and two-phase
clock inputs.
• HSC1 and HSC2 are versatile counters that can be configured for one of twelve
different counting modes of operation, including single-phase and two-phase
clock inputs.
• HSC3 and HSC5 are simple counters that have one mode of operation
(single-phase clock inputs only).
Table 6-1 defines the modes of operations supported by high-speed counters
HSC0, HSC3, HSC4, and HSC5. All S7-200 CPUs support these high-speed
counters.
Table 6-1 High-Speed Counters HSC0, HSC3, HSC4, HSC5
Mode
HSC0 HSC3 HSC4 HSC5
Mode
I0.0 I0.1 I0.2 I0.1 I0.3 I0.4 I0.5 I0.4
0 Clk Clk Clk Clk
1 Clk Reset Clk Reset
2
3 Clk Direction Clk Direction
4 Clk Direction Reset Clk Direction Reset
5
6 Clk Up Clk Down Clk Up Clk Down
7 Clk Up Clk Down Reset Clk Up Clk Down Reset
8
9 Phase A Phase B Phase A Phase B
10 Phase A Phase B Reset Phase A Phase B Reset
11