nick88
Member
I have a Redlion G315 HMI dsplay with a RS-232 serial communication link using an ABB TotalFlow Master driver. The RS-232 serial line is hooked to a B&B Smartworx RS-232/RS-485 isolated converter. 2-wire RS-485 link wired as a daisy chain is used to talk to three different nodes in the field. Total distance of communication link is probably around 600 ft or so. Im using a single pair shielded 16awg.
Each node is a Totalflow RTU. I do have the termination resistor jumper set on the last RTU. I am using the Redlion to poll app-array-registers out of the RTU's and display on the HMI.
I am able to poll the first RTU with no issue, but if I try polling the polling the second RTU, I loose communications. I do not receive any data from RTU's one or two.
What are some troubleshooting methods I can try to see whats going on?
Nick
Each node is a Totalflow RTU. I do have the termination resistor jumper set on the last RTU. I am using the Redlion to poll app-array-registers out of the RTU's and display on the HMI.
I am able to poll the first RTU with no issue, but if I try polling the polling the second RTU, I loose communications. I do not receive any data from RTU's one or two.
What are some troubleshooting methods I can try to see whats going on?
Nick