1747-SDN master and 1769-SDN slave

Join Date
Apr 2003
Location
Toronto
Posts
151
I have an existing 1747-SDN that is communicating to a third party card (That device controls 12 drives). We want to get rid of the 3rd party eventually so I have set up a Controllogix L36 PLC with a 1769-SDN card. When I look at the documentation about slaving there it seams easy enough.

So I added the existing third party card to the new 1769-SDN card I don't want to control the outputs so I removed the output table from the 1769-SDN.

When I look at the 1747-SDN card it tells me there is a conflict. since there are two devices looking at the card. I guess this is not the way to do this.

Is there a way that the 1747 and 1769 can share the inputs. I really don't want to touch the 1747.

The 3 rd party item is a L5351 Eurotherm Link Card with an Devicenet slave card.

A second issue is that all 1747 SDN I/O is 16 Bit whereas the 1769 controllogix is reading in at 32 bits can this be changed so that it reads the first 16 bits and ignores the balance.

Thanks for any help, I know i can figure out the 16/32 bits but the master slave thing has me stumped.

I was asked to start a new thread for this so sorry for the repeat. I also attached a DNT file for those who want to see more of what I am trying to do.
 
Last edited:

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