SLC remote I/O

[chriswell 0]

i'm planning to install a 1747-sn in my local slc-5/04 local chassis. I will add a new remote 13 slot chassis with 1447-asb. I will use 9 slot on the 13. My question is can i leave some free slot between some for future usage? example (1 slot adressing) slot 0 = 1747-ASB slot 1 = 1746-NI8 slot 2 = 1746-NI8 slot 3 = 1746-NO4I slot 4 = spare for future slot 5 = 1746-IB32 slot 6 = 1746-OB32E slot 7 = spare for future slot 8 = 1746-IA16 slot 9 = spare for future slot 10 = 1746-OA16 slot 11 = 1746-OA16 slot 12 = spare for future or should i do something like that? slot 0 = 1747-ASB slot 1 = 1746-NI8 slot 2 = 1746-NI8 slot 3 = 1746-NO4I slot 4 = 1746-IA16 slot 5 = 1746-IB32 slot 6 = 1746-OB32E slot 7 = 1746-OA16 slot 8 = 1746-OA16 slot 9 = spare for future slot 10 = spare for future slot 11 = spare for future slot 12 = spare for future Thank you very much

[Guest]

Greetings chriswell, and welcome to the forum ... certainly you can leave empty slots for future use ... no problem ... going just a little bit further ... are you aware that you can "splice" two chassis together without using the SN-ASB method? ... I've run into several cases in the past where a simpler (and much less expensive) "Chassis Interconnect Cable" could have been used ... of course both of the chassis need to be REALLY close together for this to work ... but if you've never heard of this approach, have a look at page 6-12 in this manual and take it from there ...

[chriswell 0]

Hi There is already 3 local racks configured and there's only 2 slot available in the last rack. Thank you If i leave some spares between,in the same adapter rack, how the scanner manage in that case. ? Is my question clear? Chris

[Guest]

when you install the 1747-SN module, it will automatically create 32 words in your Input Table ... AND ... 32 words in your Output Table ... for example: if you plug the SN scanner into slot number 4 of your PROCESSOR’S local chassis, then words I:4.0 through I:4.31 will be created on the Input Table ... and words O:4.0 through O:4.31 will be created on the Output Table ... if you leave empty slots anywhere within that range, then the words will still exist on the tables ... but the addresses in those particular words will just not be used by your program ... page C-1 [Adobe Reader page 127 of 171] in this manual might help with these concepts ...

[chriswell 0]

OK thank you