2. Serial Protocols
ROS® v3.11User Guide
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RMC30
2.4.5. Resetting Serial Ports
Figure 2.38. Reset Serial Port(s) Form
To reset one or more ports, check the boxes corresponding to the selected ports and select
"Apply".
2.5. Troubleshooting
Problem One
I configured a Serial IP connection to use the TCP transport (using either an inbound or
outbound connection) but nothing seems to be happening. What is going on?
Ensure that an Ethernet port link is up.
The peer may not be requesting (accepting) connections. The Connection Statistics Table will
display whether the connection is active or not.
The peer may not be sending data. The Connection statistics Table will display the counts of
transmitted and received data packets via the IP network.
Watch the connection activity. For a detailed description of the TCP connection activity, turn
on tracing at the TRANSPORT level.
Problem Two
My connections (as shown in the Connection Statistics Table) go up and then immediately go
down again. What is going on?
If two ports (on the same or different RuggedServers™) are configured to call the same IP/
TCP port in the network, only the first one to call will be successful. All other ports will fail,
displaying the attempts as brief periods of connection in the Connection Statistics Table.
Problem Three
My Modbus polling is not working. I am sure that a connection is occurring but my Master
reports an error connecting to the device. What is happening?
Are framing, parity or overrun errors reported by either the client or server?
Is the Server Gateway set up for the correct baud, parity and stop bits? Is the RTU online?
