Emerson SI-Universal User Manual page 81

P1 Device Type (1x.038) : Any other type of device
P1 Low Speed Update Rate Active (1x.063) is always zero.
1x.064
Minimum
Default
Type
Display Format
Coding
Value
0 None
1 Hiperface
2 EnDat2.1
3 EnDat2.2
P1 Encoder Protocol Detected (1x.064) shows the encoder comms protocol detected during
position feedback Initialization. If P1 Device Type (1x.038) is set to SC Hiperface then P1 Encoder
Protocol Detected (1x.064) is set to the appropriate value after successful communication with the
encoder during Initialization. If P1 Device Type (1x.038) is set to EnDat or SC EnDat then P1
Encoder Protocol Detected (1x.064) is set to the appropriate EnDat protocol after successful
communication with the encoder during Initialization. If communications is not successful during
Initialization then P1 Encoder Protocol Detected (1x.064) is set to 0 (None).
1x.067
Minimum
Default
Type
Display Format
Coding
If P1 User Comms Enable (1x.067) set to a non-zero value, it is possible to use P1 User Comms
Transmit Register (1x.068) and P1 User Comms Receive Register (1x.069) to communicate with
an encoder that has a Hiperface, EnDat 2.1, EnDat2.2 or BiSS* interface. A description of how to
use these registers is given below.
P1 Device Type (1x.038): SC Hiperface, SC EnDat
Hiperface or EnDat 2.1 communications are used as appropriate if P1 User Comms Enable
(1x.067) is set to a non-zero value.
P1 Device Type (1x.038): EnDat
Communications is enabled when P1 User Comms Enable (1x.067) is set to a non-zero value.
If the encoder supports EnDat 2.2 it is possible to enable user communications at any time even if
the drive is enabled.
Table 7-5 below shows the possible communication levels for different values in P1 User Comms
Enable (1x.067).
* BiSS is not currently supported.
SI-Universal Encoder User Guide
Issue: 2
P1 Encoder Protocol Detected
0
8 Bit Volatile
None
RO, Txt, ND, NC, PT
Text
P1 User Comms Enable
0
0
8 Bit Volatile
None
RW, NC, PT
Maximum 3
Units
Update Rate Background write
Decimal Places 0
Maximum 1
Units
Update Rate Background read
Decimal Places 0
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