Using a PLC-5 as a Remote I/O Adapter

[fsnader]

Hello!
I'm working on a project where I have to comunicate a Schneider Modicom Quantum with a AB PLC-5/30. My costumer have only a QRIO-002 module to the Quantum and we are trying to use only this equipment. This module talks with A/B remote I/O adapters, as it was Ethernet TCP/IP.

So, the plan is to configure a PLC-5's channel as a RIO Adapter and send the data files to the Schneider PLC. The problem is that I don't know how to configure the PLC-5 to provide the correct adresses.

To be more especific, I'm having problems with the attached picture's screen. How do I should configure it? I want to send some integer data files.
Do you think I will have problems with this solution?

Thank you!

 

[dmargineau]

Refer to Chapter 7 of:
http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1785-um012_-en-p.pdf

 

[Mike_RH]

How many words of data do you need to transfer?
The rack Size parameter sets this 1/4 = 2 words, 1/2 = 4 words, Full=8 words.
If you need to transfer more than 8 words, the scanner needs to support block transfers. Does it?

 

[fsnader]

dmargineau:
Thank you for the material, It will be very usefull!

Mike_RH:
I don't know exactly how many words of data, but I'm sure it's more than 8. How can I do this? I think I will have to construct some logic in PLC-5, right?

 

[Mike_RH]

If you need to transfer more than 8 words in each direction, you can:
- Multiplex data or
- Use block transfers, these would be initiated by the scanner - does the scanner have block transfer capability? (Second time I have asked)

Block transfers may be up to 64 words long.

 

[fsnader]

Yes. The scanner has block transfer capability.

 

[Mike_RH]

Ok, then you can transfer data in blocks of 64 words, either read or write or both.
You can set up a set of pair (r/w) for each slot in a module group.

The setup is in manual already linked by dmargineau.

How much data do you need to transfer?

 

[fsnader]

I don' know the correct value, but it's in the range of 200 words.

 

[Mike_RH]

For that much data, you have a choice of either:
1. - Using 4 block transfers to get the ~200 words
or
2. Use 1 and multiplex the transfer.

Will the transfer be bidirectional or unidirectional?

 

[fsnader]

The transfer will be bidirectional in some cases. I have words that I have to write and read, and I have words that I have only to read.
I understand that, in this case, I have to use some block transfers to read and some block transfers to write those words, right?