Emerson Unidrive M702 - Encoder Simulation Output Set-Up

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Unidrive M702 User Guide 115
Issue Number: 3
7.5 Encoder Simulation Output Set-up
The drive supports three modes of encoder simulation output.
• Hardware mode - Incremental signals (AB, FD, FR)
• Software mode - Incremental signals (AB, FD, FR)
• Software mode - Absolute SSI data
The availability of the encoder simulation output on the 15-way D-type on the drive is dependent on the type of feedback device connected to the P1
position interface. See Table 4-27 on page 81 for more information on the availability of the encoder simulation output. The status of the encoder
simulation output can be seen in Encoder Simulation Status (03.086) as follows:
None (0) The encoder simulation output is not enabled or is not available
Full (1) Full encoder simulation with marker output is available
No Marker (2) Encoder simulation without marker output is available
This section shows the parameter settings which must be made to use the encoder simulation output on the drive. For more information on the
parameters listed here please refer to the Parameter Reference Guide.
7.5.1 Hardware mode - Incremental signals (AB, FD, or FR)
Hardware mode provides incremental signals derived via hardware from the P1 position feedback interface on the drive, with negligible delay. The
supported incremental output signals are AB, FD and FR. Hardware mode only produces an output when the input device connected to the P1
position interface is AB, FD, FR, SC, SC Hiperface, SC EnDat or SC SSI type devices. It should be noted that with a SINCOS source device the
output is based on the zero crossings of the sine wave inputs and does not include interpolation.
Absolute EnDat communication only encoder or BiSS encoder
Device Type (03.138)
EnDat (4) for an EnDat communications only encoder
BiSS (6) for a BiSS communication only encoder
Auto-configuration Select (03.141)
Auto-configuration is enabled at default and automatically sets up the following parameters:
Rotary Turns Bits (03.133)
Comms Bits (03.135)
These parameters can be entered manually when Pr 03.141 is set to Disabled (0).
Comms Baud Rate (03.137) 100 k, 200 k, 300 k, 400 k, 500 k, 1 M, 1.5 M, 2 M, 4 M
Error Detection Level (03.140)
Bit
Description
3 2 1 0
1xxx
Disable trips Encoder 4 to Encoder 7
Absolute SSI communications only encoder
Device Type (03.138) SSI (5) for a SSI communications only encoder
SSI Binary Mode (03.148)
Off (0) = Gray Code
On (1) = Binary Mode
Rotary Turns Bits (03.133) Set to the number of turns bits for the encoder (this is usually 12 bits for a multi-turn SSI encoder)
Comms Bits (03.135)
Total number of bits of position information for the encoder (this is usually 25 bits for a multi-turn SSI
encoder)
Comms Baud Rate (03.137) 100 k, 200 k, 300 k, 400 k, 500 k, 1 M, 1.5 M, 2 M, 4 M
Error Detection Level (03.140)
Bit
Description
3 2 1 0
x1xx
Enable SSI power supply alarm bit monitor
1xxx
Disable trips Encoder 4 to Encoder 7