BECKHOFF KL5111-0000 - Manual (Page 14)

Register description
12 KL5111-0000
3.3 Terminal-specific register description
3.3.1 Application parameters
R32: Feature Register
The feature register determines the operating modes of the terminal (default . 0x0000).
Bit Value Description default
0
bin
Encoder interface is activated R32.15
1
bin
Counter mode is activated
16-bit up/down counter
Input A: counter
Input B: counting direction (high = down, low = up)
Input C: high = counter disabled, low = counter enabled
0
bin
R32.14 - reserved 0
bin
... ... ... ...
R32.9 - reserved 0
bin
0
bin
Period time is measured if bit CB.1 of control byte is set R32.8
1
bin
In place of the period time a frequency measurement is executed. Impulses in
a time window are counted. The time window is over R33 adjustable.
0
bin
R32.7 - reserved 0
bin
... ... ... ...
R32.1 - reserved 0
bin
0
bin
the underflow/overflow signals are output in the status byte. R32.0
1
bin
The signals A; B, C are output in the terminal's status byte.
0
bin
R33: Time window for frequency measurement
Defines the length of the time window for frequency measurement (default: 0x0000).
Resolution: 1 ms/Digit
1 Digit = 1 ms
The measured frequency is displayed in process data bytes D3 and D4.
The process data bytes D3 and D4 show the number of pulses counted within the time window defined by
R32. The frequency can be calculated from this.
i
Note
Please note that bit CB.1 of control byte has also to be set for frequency
measurement!