6/2/2016 7:41 AM | |
Posts: 52 Rating: (1) |
Thank you much for answers. |
Last edited by: ASIMO21 at: 6/4/2016 8:53:47 PM |
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6/4/2016 8:54 PM | |
Posts: 52 Rating: (1) |
If I used one CP with 80 slave I can buy repeater, yes? what Modbus RS 485 repeater from siemens or other company? |
6/4/2016 9:29 PM | |
Posts: 5225 Rating: (1192) |
Yes, you can extend the reach of the communication when using repeaters (distance & address space). The Siemens' 6ES7972-0AA02-0XA0 would probably work.. but I would buy elsewhere. Phoenix Contact in most cases can help with these sort of thing or AdvanTec {LINK}. Be warned that you will need at least 2 repeaters.. a contributing factor is the cable lengths not only the number of slaves. Do talk to the guys who sell the repeaters for details. Do consider though that the throughput on 80 slaves are low if you use only 1 communication module. If you have more communication modules on the CPU you can cycle quicker through the slaves. w |
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