Siemens Simatic S7 Series System Manual

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

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.