Subject: Seeking Assistance with Intermittent DPI Port 5 Alarm on Drives Hello everyone, We’re encountering a recurring issue with a DPI Port 5 alarm that occurs every few days on our drives, with only one drive affected at a time. Despite replacing both drives and the ribbon cables, the problem persists. I’m reaching out to see if anyone has experienced similar issues and might have suggestions for resolution. Our End of Life (EOL) statuses are all in good standing, and we manage everything through our CN2DN system. Currently, we have only two drives connected to this bus, while all other devices on the network are E3 interfaces. Importantly, we haven’t detected any device errors with our E3s. Any insights would be greatly appreciated! Best regards.
75 versus 85 Error: Understanding DeviceNet Failures From what I remember, a 75 error indicates a problem on the fieldbus side of the 20-COMM-D module, suggesting that the issue lies within the DeviceNet network itself. On the other hand, if you’re encountering an 85 error, this points to a failure on the DPI side of the 20-COMM-D. In this case, it’s crucial to inspect the ribbon cable, check for any vibrations, or evaluate the 20-COMM-D module itself for potential faults. Additionally, it’s important to consider how long these modules have been in operation and what types of drives are being utilized. These factors can significantly impact troubleshooting and maintenance.
Thank you for your response. We are working with PowerFlex 70 drives, both of which are brand new and equipped with 20-Comm-D modules and ribbons. Unfortunately, I'm unsure about the specific error that appears, as I haven’t been on-site when the issue occurs. We have not replaced the CN2DN yet, but I don't believe that is the root of the problem.
**User Inquiry on DPI Port 5 Alarm and Suggested Solutions** Greetings! Every few days, we encounter a DPI Port 5 alarm on our drives, with only one drive affected at any given time. We have already replaced both drives and the ribbon cables, but we’re looking for advice or suggestions from the community. Our End-of-Life (EOL) indicators are functioning properly, and we manage everything via our CN2DN network. On this bus, we only have two drives connected, while all other devices are E3 models. Notably, no device errors have been reported with our E3 units. Upon further investigation, I believe DPI Port 5 corresponds to the keypad on the drive itself, based on my recollections. In a past experience with Powerflex 70 and Powerflex 700 drives operating in a high-vibration environment, we encountered a similar issue. The keypad would remain clipped to the drive’s plastic housing, but vibrations would dislodge it from the five pins linking the cover to the main system board. This created an intermittent readout, where it appeared as if the keypad was being detached and reattached. We had enabled the STOP button on the keypad, resulting in the affected drive shutting down unexpectedly. We reported this issue to tech support, who instructed us to secure the cover to the drive. We applied a temporary clamp around the DeviceNet LEDs visible on the front of the drive, below the keypad, and noticed an immediate improvement in performance. Although we could only implement this solution on one of the drives, it proved effective. Tech support subsequently sent us replacement covers for four affected drives (two Powerflex 70 and two Powerflex 700 models) that featured pins extended by 0.25 inches. Since then, we have not encountered any further issues. If anyone has faced similar challenges or has alternative solutions, your insights would be greatly appreciated! Thank you!
The fieldbus module connects through DPI Port 5, while the Human Interface Module (HIM) is located in the on-frame cradle at DPI Port 1. A DPI fault code of 75 often indicates a common issue related to subpar wiring within the network. I have diagnosed and resolved hundreds of these cases. Additionally, it's fascinating to hear the story about vibration-related damage to the cradles!
Ken Roach stated, "The fieldbus module is configured on DPI Port 5, while the Human Interface Module (HIM) located in the on-frame cradle is connected to DPI Port 1. DPI fault 75 often indicates issues stemming from improper wiring in the network, a problem I’ve encountered while troubleshooting countless systems. That’s an interesting account regarding the vibration damage to the cradles! I apologize for the earlier inaccuracies in my details—I should have double-checked the information before posting. I still haven't verified it!"
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