Testing input pins on VSD-E/XE

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This article describes an easy method to verify CMD port input signal proper functionality on VSD-E/XE drives.

Note: This testing method works only for following inputs:

  • Opto-in 1
  • Opto-in 2
  • Analog in 1 (as digital input)
  • Analog in 2 (as digital input)

Opto-in 3-4 can't be tested this way because these are shared with serial traffic and would interfere with GDtool connection. However, working GDtool connection proves that inputs 3-4 are working because connection wouldn't be possible otherwise.

Setup[edit | edit source]

Connect drive to GDtool and follow the instructions below.


  1. Configure "User bit"
  2. Select input to be tested from configuration dialog
  3. Click Ok
  4. Click Set

Then go to Device status tab


4. Monitor "User configured input" status bit and see if it changes as you toggle the selected input signal on CMD port. Green means that drive reads input value as logic 1 (or 0 if invert option selected).

Note: this method doesn't verify fast toggling signals. Status page update interval is 1-2 seconds so shorter than 2 second pulses may not change status color.

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