Copley Controls Accelnet Plus BEL Series User Manual page 103

Accelnet & Stepnet Plus Panels User Guide
Q A/B I
UAD NCREMENTAL
Encoders with differential line-driver outputs
are required (single-ended encoders are not
supported) and provide incremental position
feedback via the A/B signals and the optional
index signal (X) gives a once per revolution
position mark. The MAX3097 receiver has
differential inputs with fault protections for the
following conditions:
Quad Encoder with Index
CME Feedback Options
CME options for encoder fault detection are made in the
Feedback tab of the Motor/Feedback box on the main page.
(•) Enable Encoder Loss Detection
An Encoder Fault occurs with the loss of the A or B channels
of the encoder
(•) Enable Encoder Loss Detection
(• )Enable Encoder and Index Loss Detection
An Encoder Fault occurs with the loss of the A, B, or X
channels of the encoder
E
NCODER
Condition
Line-line shorts
Open-circuits:
Low-voltage
Example
A shorted to /A
A disconnected, /A connected.
Terminator resistor pulls A & /A together
for a cable short-circuit fault
Va - Vb ≤ 200 mV, or ≥ -200 mV
Encoder power loss, cabling, etc.
Signal Loss Detection Logic
16-01339 Rev 07