1791-i0bx

[virtualracer]

i am planning to use this 1791 block i/o but still confused by the program addressing. can i use the same rack/group address in both input and output? i'm using plc-5/40e and would be connecting thru channel 1b configured as rio scanner

 

[Ken Roach]

Wow, that's a blast from the past. I'm editing my whole post because I was wrong about the density.

The 1791-IOBX is a 64 Input/64 Output module, so you use symmetrical Input and Output addressing.

If, for example, the module was addressed starting at Rack 01, Group 00, your addresses for the block would be:

I:010:0-15
I:011:0-15
I:012:0-15
I:013:0-15

O:010:0-15
O:011:0-15
O:012:0-15
O:013:0-15

Google found a user manual:

http://www.kirbyrisk.com/allen-bradley/racatcd/b112/b112pubs/179121/iobx.pdf

 

[allscott]

Wow, that's a blast from the past.

I've never seen one of these things, are they old?

Anyway I found a manual on AB's site.

http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1791-um002_-en-p.pdf#xml=http://127.0.0.1/texis/search/pdfhi.txt?query=1791+iobx&pr=literature.rockwellautomation.com&prox=page&rorder=500&rprox=750&rdfreq=0&rwfreq=0&rlead=250&rdepth=0&sufs=1&order=r&cq=&id=471a05137

 

[virtualracer]

i was just thinking of paging Ken Roach...thanks, i was thinking about the symmetrical addressing too..just not too sure about it...anyway, that would be one issue down. THANKS...BTW, A/B have the manual on their site...and the other 128-point compact block is the 1791-i0vx