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3.4
Compatibility with encoder types
The SI-Universal Encoder module is compatible with the following encoder types.
3.4.1
Incremental encoders AB, FD, FR and SC
These types of encoders give incremental position and are intended to be used for control in
RFC-A mode. They can be used for operation in RFC-S mode but a phasing test is required at
every power-up.
AB
FD
Incremental
SC
Quadrature detection logic determines rotation from the phase relationship of the two channels.
These encoders can be used for RFC-A and RFC-S mode of operation and are available with a
marker pulse, which identifies each individual rotation of the encoder, and is also used to reset the
drive position parameter. The marker pulse is not required for correct operation.
NOTE
With this type of feedback, the drive must carry out a phasing test to find the phase offset angle on
power up for operation in RFC-S mode.
SC
When a SinCos encoder is used additional position resolution is obtained by measuring the
magnitude of the signals.
NOTE
Refer to section 3.4.2 for information regarding SinCos encoder feedback signals.
Type
AB
FD
FR
Incremental
NOTE
The maximum speed in rpm which an encoder connected to The SI-Universal Encoder module can
reach can be calculated from:
3
Issue: 2
Quadrature incremental encoder.
Incremental encoder with frequency and
direction outputs. With or without marker pulse
pulse.
outputs. With or without marker pulse.
SinCos encoder with no serial communications
No optional marker pulse.
500 kHz*
page 11.
Pr1x.038
Pr2x.038
0
1
1
2
2
3
6
100,000
9
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