Hello,
I am just getting started trying to integrate the new RevPi connect into some existing control systems that have a few modbus rtu slave devices. I have the connect communicating through VNC and set up no problem. I was getting ready to go through the Modbus-Jessie tutorial. My problem is I am unfamiliar with your rs-485 pin naming convention. I can recognize one of the symbols as ground, one as (maybe) shield, then N and P. I was hoping that these would be labeled a,b, V+, gnd. I have not been able to find any mention of that particular naming scheme in any of the rs-485 standards manuals (so far). Any clarification on this would be much appreciated.
RevPi Connect
Hello, sorry for the missing information, we will add this in our online documentation. So here is the information you need: from top to down the signal lines on the RS485 plug are
- functional ground
- ground
- B (negative, N or D-)
- A (positive, P or D+)
