CI801 profibus communication
I have customer who is asking profibus communication at 12 MBPS.
I am having 3 CI801 stations and 6 ACS850 drives to be communicated with One CI854.
Distance is not a matter as i am going to use repeaters.
Please suggest, if anybody mixed drives and CI801 stations or similar configuration at 12 MBPS.
If it is possible to how many input and output data it is limited?
If not 12 MBPS, till what rate (more than 1.5 MBPS) i can communicate?
CI801_ 1: AI810(5), AO810(3), DI810(5), DO810(3)
CI801_2: AI810(5), AO810(2), DI810(10), DO810(4)
CI801_3: AI810(4), AO810(3), DI810(9), DO810(4)
Please let me know if more details are required.
Thanks in advance.
Voted best answer
I don't know why your customer want to make 12MBPS Communication which is very unusual.
you can do communication with slaves on 12Mbps speed all devices you mentioned are 12Mbps Supporting devices. only chances which may be annoying you will be communication drop. i will recommend you that connect your devices and start communication if you have not so much distance it should be OK. otherwise you can descrese the speed and you can check whats is possible communication speed you can provide.
Find the distances for the pofibus coummication verses Buadrate. I am not sure that you can meet 12Mbps.
I will apprcitate if soemone else give you better answer.
Would you like to tell me which application on this system will run,how much distance you will have and how many I/O cards you will connect per Ci801.
Then may be i can work for you and find out if there is any better reply.
If it's Tissue Paper Machine then your customer is bit realistic.
as far as my experince with profibus i hope that if your distances less then 100 Meter between the devices and CI854 then you wll not have issue with the 12Mbps.if you will exceed the distance morethe 100 upto 300 Meter you need to stepdown your baudrate.
Only you need to be very carful about grounding of profibus cable any electrical spike which may distrub your communication.
you can also think to use Glass fiber-optic cables for PROFIBUS for the better communication. Intially to use reapter is not good idea becaue normlly we requied repeater only if e have more then 32 device on 1 segment or distance is more then 1000 Meter.
Go ahead with your customer it will work.