5 Implementation of Modbus TCP
5.9 Parameters of the modules
XI/ON: XNE-GWBR-2ETH-MB
10/2011 MN05002008Z-EN
www.eaton.com
89
• XN-1SSI
Table 34:
Module
parameters
Byte Bit
Parameter
name
Value
A
Default-
settings
0
4 to 0
reserved
5
Encoder data cable test
0 = activate
A
– ZERO test of data cable.
1= deactivate
– After the last valid bit, a ZERO test of
the data cable is not carried out.
7,6
reserved
1
3 to 0
Number of invalid bits (LSB)
0000 to 1111:
Number of invalid bits on the LSB side of
the position value supplied by the SSI
encoder. The meaningful word width of
the position value transferred to the
module bus master is as follows:
SSI_FRAME_LEN
- INVALID_BITS_MSB
- INVALID_ BITS_LSB.
The invalid bits on the LSB side are
removed by shifting the position value to
the right, starting with the LSB.(Default 0
bit = 0×0).
INVALID_BITS_MSB
+ INVALID_BITS_LSB must always be
less than SSI_FRAME_LEN.
6 to 4
Number of invalid bits (MSB)
000 to 111:
Number of invalid bits on the MSB side
of the position value supplied by the SSI
encoder. The meaningful word width of
the position value transferred to the
module bus master is as follows:
SSI_FRAME_LEN
- INVALID_BITS_MSB
- INVALID_BITS_LSB.
The invalid bits on the MSB side are
zeroed by masking the position value.
INVALID_BITS_MSB
+ INVALID_BITS_LSB must always be
less than SSI_FRAME_LEN.
Default: 0 = 0hex
7
reserved
