Remote access of IO using DP/DP coupler
I have 9-DI821, 3-DO820 & 1-AI810 cards, if I want to communicate all these cards connected in PM851A via profibus to PM866 using Siemens DP/DP coupler then what type of byte system require to configure while downloading GSD.
Asked 6 months ago
Voted best answer
3
You need to go read the manual for the DP/DP coupler.
You cannot read the IO modules directly. Each IO Module can only have **ONE** Master and you can only have **ONE** master on the profibus. So if the cards belong to the PM851A, then you need to read / write the IO channels in the PM851A then copy the values to and from the DP/DP coupler.
The PM866 cannot read and write to the IO modules directly - only to the PM851A via the DP/DP coupler. So whatever bytes you choose to configure in the DP/DP coupler is up to you.
Answers
1
Better you can do the MMS communication between the PM866 and PM851 by connecting a ethernet cable to control network and send the datas using MMS variable, due to more number of signal transfer u can do the MMS communication it will better choice.
Answered 6 months ago
by kstoilov
As advised in your previous questions - please provide a sketch of what you want to do, for better understanding
by kstoilov
Why you don't connect directly these IO's by Profibus to PM866, without PM851?
by Atul Singh Rank: 1408 on 2/5/2018 3:12:28 AM | Like (0) | Report
Sure
by Atul Singh Rank: 1408 on 2/5/2018 3:13:25 AM | Like (0) | Report
how should I upload the drawing to you
by Atul Singh Rank: 1408 on 2/5/2018 3:16:52 AM | Like (0) | Report
https://drive.google.com/open?id=1VCwNp6Ww45XjUF3Z4n4TIJ3Sq0IfG38S
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