Siemens SIMATIC ET 200SP Equipment Manual

Parameters/address space
4.8 Quadrature evaluation of differential signals
ET 200SP F-TM Count 1x1Vpp sin/cos HF (6ES7136-6CB00-0CA0)
Equipment Manual, V1.0, 01/2021, A5E47073911-AA
49
The figure below shows an example for continuing the counting process after an overflow
and setting the counter to the opposite counting limit:
4.8 Quadrature evaluation of differential signals
With quadrature evaluation, the A and B signals are shifted by 90 degrees in relation to each
other. When the A signal is leading, the movement is in the forward direction. When the B
signal is leading, the movement is in the reverse direction.
Counting occurs at each "zero-crossing" of the A and B signals. As a result, each complete
waveform has a total effect of 4 counts. For example, given a 200 kHz frequency, 800K
counts per second can be achieved. These relationships are illustrated in the figure below:

Siemens SIMATIC ET 200SP Specifications

General

System Type	Distributed I/O System
Mounting	DIN Rail
Communication Protocol	PROFINET, PROFIBUS
IP Rating	IP20
Category	I/O Systems
Supply Voltage	24 V DC
Modularity	Yes
Hot Swapping	Yes
Storage Temperature	-40°C to +70°C
Digital Inputs	Yes
Digital Outputs	Yes
Analog Inputs	Yes
Analog Outputs	Yes
Communication Interface	PROFINET, PROFIBUS
Number of Modules	Up to 64
Relative Humidity	5 to 95% (non-condensing)
Operating Temperature	-25°C to +60°C