Encoder Loss Detection - Delta PBC Series User Manual

Power Brick Controller User Manual

Encoder Loss Detection

Warning
The Power Brick Controller has circuitry dedicated to monitoring the presence of a proper feedback signal.
In addition, it can automatically check these circuits for loss of sensor signal and take appropriate shutdown
action. This feature supports the following types of encoders:
➢
Digital quadrature (differential)
➢
Sinusoidal
➢
Resolver
➢
HiperFace
➢
Serial Encoders
Special Functions & Troubleshooting
Loss of the feedback sensor signal is potentially a very dangerous
condition in closed-loop control, because the servo loop no longer has
any idea what the true physical position of the motor is – usually it
thinks it is "stuck" – and it can react wildly, often causing a runaway
condition.
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