Hello all. I have a job to add a 1794-IE8 Card in slot 5 on an existing Flex IO Rack which uses a 1794-ASB communications module, which communicates to a 1756-DHRIO control logix card. The existing rack only has digital cards in it so far which is why there is no BTR/BTW instructions to copy from. I have zero experience with this kind of communications however i have used MSG instructions in the past.
In terms of retrieving the data from the 1794-IE8 card, i've read that you have to use BTR/BTW instructions. With control logix this is all now handled in the MSG instruction. I've seen an example bit of code which only used a BTR MSG instruction but no BTW?
I have attached screenshots of the current setup. If i need a BTW in there on first pass or anything do you have an example piece of code or point me in the right direction as to how to set this up? the job is only adding 1 flow meter to channel 0 of the new card (4-20ma).
Unfortunately this is a suck it and see it type of job where i'm unable to test in the office prior to site attendance so i'd like to have some confidence that i'm at least heading in the right direction before attending site
In terms of dip switch settings, is there anything i may have to change on the ASB module when adding an analogue card?
Many thanks in advance. I've only been programming for 10 years now so i've been brought up on mainly ethernet!
In terms of retrieving the data from the 1794-IE8 card, i've read that you have to use BTR/BTW instructions. With control logix this is all now handled in the MSG instruction. I've seen an example bit of code which only used a BTR MSG instruction but no BTW?
I have attached screenshots of the current setup. If i need a BTW in there on first pass or anything do you have an example piece of code or point me in the right direction as to how to set this up? the job is only adding 1 flow meter to channel 0 of the new card (4-20ma).
Unfortunately this is a suck it and see it type of job where i'm unable to test in the office prior to site attendance so i'd like to have some confidence that i'm at least heading in the right direction before attending site
In terms of dip switch settings, is there anything i may have to change on the ASB module when adding an analogue card?
Many thanks in advance. I've only been programming for 10 years now so i've been brought up on mainly ethernet!
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