Eric Nelson
Lifetime Supporting Member + Moderator
This question is probably best answered by Tom (Jenkins), but others may be able to offer suggestions. Tom, after reading a few of your posts over at the A-D forum, I gather that you're familiar with using MODBUS with A-D stuff. I'll probably ask this same question over there, but I'll probably have to wait a week for a usable answer...
I am by no stretch of the imagination very familiar with MODBUS, but I have been sucessful in the past using MODBUS to talk to A-D drives and HMI's, but only because they give step-by-step instructions and examples for these specific combinations...
Now I'm trying to communicate with a Trio motion controller via port 2 of a DL260 CPU (RS-232). So far I've had no luck. I'm positive I've got the wiring right, so I think I just have the communications setup wrong.
As it stands, I have the Trio setup for MODBUS communications at 9600,8,N,1. It's station address is 2. I'm confident that the Trio settings are correct as I've used the Trios before with a Maple Systems HMI, though that used RS-485 (and I had more step-by-step and examples to help).
If it helps, the manual for the Trio can be found HERE. The MODBUS stuff is on pages 3 thru 6 in Chapter 13 (Adobe pages 475-478). Sorry for the huge manual... The pdf is encrypted, so I couldn't extract only the pertinent pages. Although, I DID save you the trouble of registering with Trio to get the manual by putting it in my webspace...
I think my problem lies in the DL260 port 2 setup and/or my use of the MRX command. Here's my port 2 settings:
[attachment]
Do these look correct?
Now that I've used up my ONE attachment allowance, I'll continue on my next post.
beerchug
-Eric
I am by no stretch of the imagination very familiar with MODBUS, but I have been sucessful in the past using MODBUS to talk to A-D drives and HMI's, but only because they give step-by-step instructions and examples for these specific combinations...
Now I'm trying to communicate with a Trio motion controller via port 2 of a DL260 CPU (RS-232). So far I've had no luck. I'm positive I've got the wiring right, so I think I just have the communications setup wrong.
As it stands, I have the Trio setup for MODBUS communications at 9600,8,N,1. It's station address is 2. I'm confident that the Trio settings are correct as I've used the Trios before with a Maple Systems HMI, though that used RS-485 (and I had more step-by-step and examples to help).
If it helps, the manual for the Trio can be found HERE. The MODBUS stuff is on pages 3 thru 6 in Chapter 13 (Adobe pages 475-478). Sorry for the huge manual... The pdf is encrypted, so I couldn't extract only the pertinent pages. Although, I DID save you the trouble of registering with Trio to get the manual by putting it in my webspace...
I think my problem lies in the DL260 port 2 setup and/or my use of the MRX command. Here's my port 2 settings:
[attachment]
Do these look correct?
Now that I've used up my ONE attachment allowance, I'll continue on my next post.
beerchug
-Eric