CQ21 Member C Join Date Apr 2021 Location Columbia Posts 61 Jul 12, 2021 #1 Hi everyone, A quick question: How do you set up a modbus network for multiple slaves? Daisychain method??
Hi everyone, A quick question: How do you set up a modbus network for multiple slaves? Daisychain method??
OkiePC Lifetime Supporting Member Join Date Mar 2005 Location ENE of Nowhere Oklahoma Posts 11,794 Jul 12, 2021 #2 RTU or TCP? If RTU, RS232 or RS422/485?
Ken Roach Lifetime Supporting Member + Moderator Join Date Apr 2002 Location Seattle, WA Posts 17,482 Jul 12, 2021 #3 The most common way to set up multi-drop Modbus RTU protocol networks is "daisy chain" with RS-485 appropriate cables and termination. My favorite vendor-independent RS-485 wiring and design resources: http://rs485.com/pfaq.html http://robustdc.com/index.php?route=information/information&information_id=10 https://www.bb-elec.com/Learning-Center/All-White-Papers/Serial/RS-485-Connections-FAQ.aspx
The most common way to set up multi-drop Modbus RTU protocol networks is "daisy chain" with RS-485 appropriate cables and termination. My favorite vendor-independent RS-485 wiring and design resources: http://rs485.com/pfaq.html http://robustdc.com/index.php?route=information/information&information_id=10 https://www.bb-elec.com/Learning-Center/All-White-Papers/Serial/RS-485-Connections-FAQ.aspx
CQ21 Member OP C Join Date Apr 2021 Location Columbia Posts 61 Jul 13, 2021 #4 Thanks for your responses! It is RS-485 Modbus RTU network but these sources clear a few things up.