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This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.

How to control the speed of VFD through PLC and get a speed feedback ?

Please refer the attachment for the connection terminal details.

1. The analog input of 4-20mA from PLC to VFD should be connected between terminals AI2 & COM. The reference channel-1 should be programmed for AI2 and the parameter AI2 configuration should be programmed for 4 to 20mA.

2. The Analog output of 4 to 20mA from VFD to PLC should be connected between terminals AO1 & COM. The analog output assignment and scaling can be done through parameters as shown in the attachment.