X20 system modules • Digital signal processing modules • X20DS1928
X20 system User's Manual 3.10
1399
4.16.5 X20DS1928
4.16.5.1 General information
The X20DS1928 module is equipped with an EnDat encoder interface. The X20DS1928 automatically detects
whether an encoder is connected with EnDat 2.1 or EnDat 2.2. This module can be used to evaluate encoders
installed in B&R servo motors as well as encoders for external axes (encoders that scan any machine movement).
The input signals are monitored. This makes it possible to detect open or shorted lines as well as encoder supply
failures.
•
EnDat 2.1 and EnDat 2.2 encoder interface
•
Encoder input monitoring
•
5 VDC and GND for encoder supply
•
NetTime function: Time stamp for position
EnDat encoders
EnDat is a standard developed by Johannes Heidenhain GmbH (
) that incorporates the advan-
tages of absolute and incremental position measurement and also offers a read/write parameter memory in the
encoder. With absolute position measurement, the homing procedure is generally not required. Where necessary
a multi-turn encoder should be installed. To save costs, a single-turn encoder and a reference switch can also be
used. In this case, a homing procedure must be carried out.
NetTime position timestamp
Highly dynamic positioning tasks require not only the position value, but also the exact time at which the position
was determined. The module has a NetTime function for this, which adds a timestamp to the recorded position
with microsecond accuracy.
The module provides the PLC with the position value and timestamp as absolute time value. The NetTime mech-
anisms ensure that the PLC NetTime clock and the local NetTime clock on the module have exactly the same
absolute time at all times.
4.16.5.2 Order data
Model number
Short description
Figure
Digital signal processing and preparation
X20DS1928
X20 digital signal module, 1x EnDat 2.1/2.2, NetTime module
Required accessories
Bus modules
X20BM11
Bus module, 24 VDC keyed, internal I/O supply continuous
Terminal blocks
X20TB12
X20 terminal block, 12-pin, 24 VDC keyed
Table 436: X20DS1928 - Order data
4.16.5.3 Technical data
Product ID
X20DS1928
Short description
I/O module
1x EnDat interface
General information
B&R ID code
0xA912
Status indicators
Counting direction, operating status, module status
Diagnostics
Module run/error
Yes, using status LED and software status
Counting direction
Yes, with status LED
Power consumption
Bus
0.01 W
I/O internal
1.3 W
Table 437: X20DS1928 - Technical data
Summary of Contents for X20 System
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