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Old December 30th, 2019, 08:10 PM   #1

Saulo35 is offline
Join Date: Jan 2012
Location: Port Coquitlam, BC
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PowerFlex 525 and Opto 22


Has anybody controlled and monitored a PowerFlex 525 VFD using Opto 22's PAC Control? The client is still undecided between EPIC or staying with SNAP/PAC, but it should be irrelevant since the software will be PCA Control in either case. I have been able to do this with Yaskawa drives over Modbus, but this will be my first time with PowerFlex. Have you used RS485 or Ethernet TCP/IP?

Any pointers will be welcome.

Thank you,
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Old February 6th, 2020, 01:10 PM   #2

Saulo35 is offline
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Location: Port Coquitlam, BC
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Thank you. In the meantime, I found that PowerFlex 525 accepts only a limited set of Modbus commands, over RS-485, not Ethernet/IP.
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Old February 6th, 2020, 04:47 PM   #3
Ken Roach
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The last guy who answered is just spamming the board; he has no "friend" with relevant experience. I'll remove his post in a minute.

In general, use Modbus RTU over RS-485 for this purpose. You get start/stop and reference/feedback control over a simple set of holding registers, and monitor parameter access over another set.

I can't give you advice on the use of EtherNet/IP with Opto-22, unfortunately. There may be some other folks on the Forum who have good information and are not spammers.
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