BECKHOFF KL5101-0000 - Manual (Page 7)

Product overview
KL5101 5
Inputs C, /C
Zero point pulse input for the terminal’s latch register.
This input is activated via the EN_LATC bit in the terminal’s control byte.
External Latch 24 V
Additional latch input of the terminal.
This input is activated via the EN_LAT_EXT bit in the terminal’s control
byte.
The counter value is latched when this input is alerted and an edge change
takes place from 0 V to 24 V.
External Gate 24 V
A high level at this contact suppresses counting by the terminal.
Status Input 5 V
Incremental encoder with fault alarm outputs can be connected to the
Status input of the KL5101.
Ue
Voltage supply for the encoder (+5 V).
Uo
Voltage supply for the encoder (0 V).
0 V, 24 V
A supply of 0 V and 24 V voltage must be applied to these contacts for
operation of the terminal.
Operating modes These can be set via the feature register (default: incremental encoder):
A, B, zero pulse incremental encoder (default)
Up/down counter with:
- A = Count , the positive edges of the input pulses are counted
- B = Up/down input
B = 0: up counting direction
B = 1: down counting direction
- C = Gate input
C = 0: counter enabled
C = 1: counter disabled
Functions - Counting
- Counter setting
- Arming the zero pulse and storing the valid value
- Determining the period between two pulses with a resolution of two
200 ns (the time between two positive edges of the input signal A is
evaluated)
- Indication of a counter overflow or underflow.
LED display The signal LEDs indicate the status of the encoder inputs A, B, C, Status
input and of the logic inputs of the gate and of the additional external latch.
The RUN LED indicates cyclic data transfer with the higher-level controller.
The RUN LED goes off if no process data is exchanged for 100 ms.
Process data The KL5101 always occupies 6 bytes of input data and 6 bytes of output
data. The control / status byte is at the least significant byte offset.
The data word D0/D1 contains the counter value (read/set) and the data
word D3/D4 contains the latch word (read).
In the period measurement mode the value can be found in D2 together
with D3 and D4.