Evaluation Of Count And Direction Signal - Siemens SIMATIC ET 200S Operating Instructions Manual

1Count24V

2.10 Evaluation of count and direction signal

2.10 Evaluation of count and direction signal
Signal Evaluation A, B
Signal evaluation by means of A, B allows you to count directionally. Different evaluation
modes are possible depending on the parameter assignment:
● Pulse and direction
● Rotary encoder
In the case of 24-V pulse generators with a direction indicator, there must be a time span of
at least 5 µs/50 µs between the direction signal (B*) and the count signal (A*), depending on
the input filter that has been assigned parameters.
Figure 2-44
If you connect a 24-V rotary encoder with two tracks that are 90 degrees out of phase at the
count and direction inputs, you can assign parameters to a single evaluation in all the
measurement and count modes.
You can also assign parameters to dual or quad evaluation in all count modes.
In all evaluation modes, you can invert direction detection at input B by parameter
assignment.
The count and direction inputs can be operated with different sensors (P switch and series
mode or M switch).
Note
If you have selected the 24V M switch setting with the 1Count24V for the "Sensor A, B, DI"
parameter, you must use the M-switching sensors.
108
Time Span between the Direction Signal and the Count Signal
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07