High-Speed I/O; High-Speed Counters Hsc0, Hsc3, Hsc4, Hsc5 - Siemens SIMATIC S7-200 System Manual

CPU and Input/Output Configuration
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
(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 Mode
I0.0 I0.1
0 Clk
1 Clk
2
3 Clk Direction
4 Clk Direction
5
6 Clk Up Clk Down
7 Clk Up Clk Down
8
9 Phase A Phase B
10 Phase A Phase B
11
6-10
HSC5 are simple counters that have one mode of operation
HSC0 HSC3
I0.2 I0.1
Clk
Reset
Reset
Reset
Reset
HSC4
I0.3 I0.4 I0.5
Clk
Clk Reset
Clk Direction
Clk Direction Reset
Clk Up Clk Down
Clk Up Clk Down Reset
Phase A Phase B
Phase A Phase B Reset
S7-200 Programmable Controller System Manual
HSC5
I0.4
Clk
A5E00066097-02