<![CDATA[Allen Bradley EIP Driver Troubleshooting]]>I've got the AB-EIP Driver talking to a CompactLogix PLC on a 1 minute poll rate.

Every 2.5 minutes I'm getting a Read Failure alarm. Is there a way to determine what is causing this error?

Also, when trying to address the bit level of a INT, I receive a Read Failure as soon as I enable the datasource. If I change the tag to a INT and multistate the error does not appear. Is this by design?

Thanks for the help!

]]>https://forum.mango-os.com/topic/2333/allen-bradley-eip-driver-troubleshootingRSS for NodeMon, 13 Apr 2026 02:31:32 GMTThu, 07 Jul 2016 04:20:54 GMT60<![CDATA[Reply to Allen Bradley EIP Driver Troubleshooting on Thu, 07 Jul 2016 20:27:09 GMT]]>Thank you for posting your results and investigation!

]]>https://forum.mango-os.com/post/12024https://forum.mango-os.com/post/12024Thu, 07 Jul 2016 20:27:09 GMT<![CDATA[Reply to Allen Bradley EIP Driver Troubleshooting on Thu, 07 Jul 2016 20:12:37 GMT]]>Per Jared's recommendation, I changed the poll rate from 1 minute to 10 seconds. Communication to the PLC is now stable.

]]>https://forum.mango-os.com/post/12023https://forum.mango-os.com/post/12023Thu, 07 Jul 2016 20:12:37 GMT<![CDATA[Reply to Allen Bradley EIP Driver Troubleshooting on Thu, 07 Jul 2016 18:45:03 GMT]]>0_1467916629602_Capture.PNG

I see two active TCP connections from Mango to the PLC. There are no TCP or CIP errors reported in the PLC Diagnostics.

I currently have one data point enabled. With that one point I've been able to get consistent results. Enabling more points produces the same result.

When the data point logging is set to Interval, the Read Failed error will occur and reset, allowing for a new datapoint to be recorded.

If data point logging is set to All Data or On Change, the data source will successfully poll the PLC one time, error after the defined poll rate, and stop updating the data point. Disabling and enabling the data source will repeat this process.

]]>https://forum.mango-os.com/post/12022https://forum.mango-os.com/post/12022Thu, 07 Jul 2016 18:45:03 GMT<![CDATA[Reply to Allen Bradley EIP Driver Troubleshooting on Thu, 07 Jul 2016 15:55:40 GMT]]>0_1467906870058_Zirkle Read Fail.png

]]>https://forum.mango-os.com/post/12013https://forum.mango-os.com/post/12013Thu, 07 Jul 2016 15:55:40 GMT