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How to control the frequency of the VFD over the network when using output assembly 20 or 22 when using DeviceNet or Ethernet IP?

FA264729

04 August 2021

Issue: 
Frequency control of the VFD over the network when using output assembly 20 or 22 when using DeviceNet or Ethernet IP
 
Product Line:
Altivar 61, Altivar 71
 
Environment:
All serial number
 
Cause:
VFD will not respond to speed control from the network when the reference channel is programmed to Comm card and the drive shows the active reference channel is Comm Card.
 
Resolution:
When using output assembly 20 or 22, by default, the Net Ref parameter is set to 0.  This parameter must be set to 1 in order to control the speed from the network for Devicnet or EtherNet IP.   The net ref parameter must be set on each time the VFD is powered.
Net Ref parameter 2A/1/4 = 1
The address can be set with the Class Instance Editor or with a message instruction block.