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VBus Low & In-Rush Relay Closed(False) Issue | 29 May 2023 | |

VBus Low & In-Rush Relay Closed(False) Issue

Hello, I'm Jaehyung Kim, a Ph.D. candidate in South Korea.

Currently, I am working on building a system that incorporates the Kollmorgen workbench, AKD-P00307, and AKMH24D-CCK2R Motor. However, I am facing an issue related to the VBus.

The available information regarding the 'In-Rush Relay' in the manual is limited, and I am struggling to understand it due to my limited efforts and skills in this area.

I would be extremely grateful if someone could provide me with advice or guidance regarding this matter.

Thank you in advance.

This is the status of our devices

Comments & Answers

jcoleman02 | Tue, 05/30/2023 - 13:13

The 07 in the AKD model number refers to high voltage, meaning 400/480VAC.  If you want to run with 220VAC (as low as 208VAC), you must set VBUS.HALFVOLT = 1.  This sets the overvoltage threshold, regen threshold, and inrush threshold appropriately for 220/240V.  Also set the undervoltage fault and warning thresholds to appropriate values.  You will see the "green" allowable voltage range in the Power screen meter move to the desired levels.


VBUS.HALFVOLT help page:

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