OPC Device Connections unstable

Ignition
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1

Hey all,

We have a lot of OPC connections that are unstable. Most are using Modbus/TCP drivers, and they will connect sometimes. But often they cycle between "connecting, disconnected," or "ReconnectWait." At the same time several of our Modbus driver connections are working just fine. I am a lesser experienced Ignition user so might need a bit of walk through in troubleshooting this issue. With these two devices in particular, I can reboot the sensor and the connection will reestablish for about a week. I'm not even sure where to begin to be honest. Are there some troubleshooting tools in Ignition for this? Using Ignition 8.1.33 currently. Thanks for the help in advance!

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No, not really. I recommend collecting a wireshark capture from the gateway during one of these events. Use a capture filter for the target IP address, typically host w.x.y.z

Perhaps, use Wireshark's "ring buffer" mode to continuously capture with file rollover (for a known length of past time).

Whatever is happening will be pretty clear in a packet capture.

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