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Absolute SSI communications only encoder, or Absolute Sincos encoder with SSI
communications
Device Type (1x.038)
Supply Voltage
(1x.036)
Rotary Line Per
Revolution (1x.034)
SSI Binary Mode
(1x.048)
Rotary Turns Bits
(1x.033)
Comms Bits (1x.035)
Comms Baud Rate
(1x.037)
Error Detection Level
(1x.040)
6.2.3
P2 position interface
This section shows the parameter settings which must be made to use each of the compatible
feedback device types with the P2 position interface on the drive. If the position feedback device
connected to the P2 position interface is required to be used for motor control feedback then
Pr 3.026 on the drive will need to be set to P2 SlotX where X is the slot number in which the module
is installed.
Table 6-2 Parameters required for feedback device set-up on the P2 position interface
Parameter
P2 Marker Mode (2x.031)
P2 Rotary Turns Bits (2x.033)
P2 Rotary Lines Per Revolution (2x.034)
P2 Comms Bits (2x.035)
P2 Comms Baud Rate (2x.037)
P2 Device Type (2x.038)
P2 Auto-configuration Select (2x.041)
Information to be entered by the user.
38
SSI (10) for a SSI communications only encoder
SC SSI (11) for a Sincos encoder with SSI serial communications
5 V (0), 8 V (1) or 15 V (2)
Set the number of sine waves per revolution of the encoder
Off = Gray Code
On = Binary Mode
Set to the number of turns bits for the encoder (this is normally 12 bits for
an SSI encoder)
Total number of bits of position information (this is usually 25 bits for an SSI
encoder)
100 k (0), 200 k (1), 300 k (2), 400 k (3), 500 k (4), 1 M (5), 1.5 M (6),
2 M (7), 4 M (8)
Bit
4
3
2
1
X
X
X
X
X
X
X
1
X
1
X
X
1
X
X
X
So for example, to enable the wire break and phase error detection, set
Pr 1x.040 to 00011.
0
1
Enable wire break detection
X
Enable phase error detection
X
Disable trips Encoder PS to SSI Error P1
X
Disable the Setup Changed P1 trip
AB, FD, FR
EnDat
SI-Universal Encoder User Guide
Description
SSI
BiSS*
Issue: 2
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