Machsupport Forum

Third party software and hardware support forums. => Modbus => Topic started by: boilerbots on May 23, 2008, 07:10:59 AM

Title: Modbus setup screen is different than documented??
Post by: boilerbots on May 23, 2008, 07:10:59 AM

I am trying to configure Modbus to control my VFD. It appears that the Modbus screen has been changed since the documentation was done.

All I need to do is write to the first 4 coil registers on my VFD. I can control the VFD through the mod test screen without any problems. How do I translate the address and register locations used in the test screen to the modbus config screen?

I have tried executing a VB script I wrote and nothing is happening. Can you provide some suggestions?

Title: Re: Modbus setup screen is different than documented??
Post by: wyo123 on May 23, 2008, 12:28:46 PM

I'm not sure if this is the issue but if you check the modbus plugin it changes that screen.
Just a sugestion

Title: Re: Modbus setup screen is different than documented??
Post by: boilerbots on May 24, 2008, 08:56:16 PM

Ah, that got me back to the documented screen.

Following the steps in a different thread, I am now able to control my Hitachi VFD SJ200 over Modbus.

Thanks!