Emerson SI-Universal User Manual page 16

3.4.6 Linear Encoders
Type Encoder
AB
SC
AB Servo
SC Servo
SC
Linear
Hiperface
encoder
SC EnDat
SC SSI
SC BiSS*
EnDat
SSI
BiSS*
Linear Quadrature / SinCos Encoder
These types of encoder are purely incremental and have no information for commutation. With this
type of feedback the drive must carry out a phasing test to find the phase offset angle on every
power up for operation in RFC-S mode.
Digital Hall Effect + Linear Quadrature / SinCos Incremental encoder
These types of encoder have digital hall effect signals U, V, W plus complements that supply the
necessary signals for deriving the position at power-up. The quadrature signals, incremental or
SinCos are used for speed feedback. A flux alignment test is required during set-up to determine
the phase offset angle for operation in RFC-S mode.
Linear Absolute SinCos encoder
These types of encoder derive the absolute position at power-up via the comms protocol,
Hiperface, EnDat or SSI with the incremental signals, SinCos, being used for incremental position
and speed feedback. A flux alignment test is required during set-up to determine the phase offset
angle for operation in RFC-S mode.
Linear Absolute encoder
These types of feedback are comms only encoders, which derive the position at power- up via
either the EnDat or SSI comms protocols. The position feedback is also passed via comms during
operation. The comms only encoders operate with the drive being the master and passing the
required clock signal. A flux alignment test is required during set-up to determine the phase offset
angle for operation in RFC-S mode.
NOTE
Refer to section 3.4.2 SinCos encoder feedback signals on page 10 for further information on the
SinCos encoder feedback signals.
* BiSS is not currently supported.
16
Description
Linear quadrature encoder
Linear SinCos encoder
Digital hall effect + Linear quadrature
incremental encoder
Digital hall effect + Linear SinCos
incremental encoder
Linear absolute SinCos encoder
Linear absolute encoder
Pr 1x.038
0
6
3
12
7
9
11
17
8
10
13
SI-Universal Encoder User Guide
Pr 2x.038
1
4
5
6
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