Configuration and Parameterization
TR-Electronic GmbH 2016, All Rights Reserved
Printed in the Federal Republic of Germany
Page 90 of 103
TR - ECE - BA - DGB - 0131 - 02
10/31/2018
6.4 Preset adjustment
Risk of injury and damage to property by an actual value jump when the
Preset adjustment function is performed!
•
The preset adjustment function should only be performed when the
measuring system is at rest, otherwise the resulting actual value jump must
be permitted in the program and application!
In 'Class 2' mode and in the 'TR - operation modes', the PROFIBUS can be used to
adjust the measuring system to any position value within a range of 0 to (measuring
length in increments - 1).
This is done by setting the most significant bit "P" of the output data (2
31
for
configuration Class 2 - 32 bits or 2
15
for configuration Class 2 - 16 bits).
Outputs
Data byte 3
Data byte 2
Data byte 1
Data byte 0
LSB
MSB
Output byte x+0
Output byte x+1
Output byte x+2
Output byte x+3
P
Inputs
Data byte 3
Data byte 2
Data byte 1
Data byte 0
LSB
MSB
Input byte x+0
Input byte x+1
Input byte x+2
Input byte x+3
The preset adjustment value transferred in data bytes 0 - 3 is accepted as the position
value with the leading edge of bit 32 "P" (=bit 7 of data byte 3).
To suppress interference, however, the new position value is only carried out if the
control bit 32 is present without interruption during the entire response time of 30 ms.
A re-adjustment is not possible until the control bit has been reset again and a filter
time of 30 ms has been waited.
6.5 Optional SSI interface
The measuring system has a separate Synchronous Serial Interface via which its
position value can be made available to a further evaluation unit (e.g. drive controller).
The position value output at this interface is identical to the value output on the
PROFIBUS in terms of conversion and code sequence. In order to use this interface, a
special cover with terminals for the SSI interface is necessary.
