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Started by gromit durio, 22 Apr Posted 22 Apr edited. Posted 22 Apr Posted 23 Apr Posted 24 Apr Posted 24 Apr edited.

Posted 25 Apr Posted 27 Apr Posted 30 Apr Posted 2 May You need to be a member in order to leave a comment. Sign up for a new account in our community. Please see attached pics for better insight. Edited 22 Apr by gromit. Share this post Link to post Share on other sites.

What I believe is happening is as follows: PLC 1 is 156 N I read through the post a few times and I think I understand the questions now. It can’t hurt to have proper terminating resistors in place as well, even with a short cable. I don’t have any direct DL experience because we never used them at 1576 Automation for various technical and legal patent-related reasons. I will mention that you have to be extremely vigilant when reading Equustek documentation because they are notorious for copy-paste editing errors.

If not, what was it? This will make the new system more similar to the way that the old system appears to have worked.



The old Profibus unit probably did, and emulated PLC-5 data tables. It needs to have three different addresses in message: Even an obsolete L1 or L55 will do the chrio if you’re on a budget.

Please find my responses to your questions in bold red font. Sorry, is the RSLinx station my laptop??? Is it needed on both ends?

Wow, could it otherwise be done by using something else rather than the Equustek DL, instead of having to procure a new ControlLogix processor???

Durio for the very detailed response. The proposed system works differently. Data Highway Plus runs either at bits per second or bits per second. Very old DHRIO modules did not have the ability to run at the higher drhio rate, so I 11756 setting everything to These should be ohms for the The DHRIO channels are electrically isolated from one another unless you wire them both together! Now using the Ethernet RSLinx driver with my laptop. Are you in the planning stages or is this stuff already bought and installed?

If so, how can this not be the best option? The new DCS was just installed and the link was scheduled to be tested this week but it xhrio clear that something was missing. According to the address translator spreadsheet from Digi: That is a big benefit that I was hoping for. Thanks for the correction on N7: Your manual calculation looks correct.


Best to get your answer direct from Digi. Ken, I just received the Digi reply this morning. I am at a different site today, but hope to find time to review the documentation thoroughly later today or tomorrow. Slave polled device is using the modbus protocol.

It will show you how configure the device for you desired setup.

After speaking with Digi tech support, they claim that it will indeed achieve the networking scheme that is needed. Thanks for your direction and support. It took less than an hour to setup and test. My guess is that the DigiOne IAP device would dhiro just as well, and we will test it in the lab once we receive it. I was looking for an interface module to standardize with, and was really hoping that the DigiOne IAP would fit the bill, but may have missed the opportunity since startup schedules dictated an expedient solution.

1756-DHRIO connectivity & setup

Thanks again for your assistance and very detailed response s. Create vhrio account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account in our community. Register a new account.

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