Encoder Monitor - Danfoss VLT 5000 Operating Instructions Manual

Encoder monitor

Both encoder interfaces are equipped with a monitoring circuit that can detect open circuit as well as
short circuit of each encoder channel. Each encoder channel has a LED showing the status: Green
light means ok, no light means fault.
Zero channel monitoring can be switched off by means of switch 1.4, this is necessary when using
incremental encoders without Zero channel or absolute encoders. Switch 1.4 disables monitoring of
both Zero channels. If disabling of only one of the two Zero channels is required (e.g. when using
incremental Flux feedback encoder and absolute option feedback encoder) the unused Zero channel
input must be connected to 5V/common as shown below.
An encoder fault will only result in an "Option error" 92 if encoder monitoring is activated via parameter
713.
Note: Monitoring of the secondary feedback encoder is disabled when switch 1.3 is "OFF".
MG.50.P3.02 - VLT is a registered Danfoss trademark
Positioning Controller
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