The system was originally developed in 2007, and it has seen considerable use over the years. While I'm not a programmer—just a dedicated electrician—I've encountered some challenges with the air flow sensor parameters on the Human-Machine Interface (HMI). Unfortunately, we lack access to the PLC (Programmable Logic Controller) program, so any necessary adjustments for optimal system performance must be done through the HMI. Currently, I’m experiencing an issue where entering 0 m³/hr as the minimum air flow and 500 m³/hr as the maximum air flow results in a consistent readout of 2500 m³/hr, which does not change. I suspect it’s a fundamental issue, but my attempts at troubleshooting through trial and error haven’t yielded any results. This system utilizes a Unity Premium PLC and a Schneider Magelis HMI. Any guidance or suggestions to help resolve this issue would be greatly appreciated. Thank you!
We appreciate your feedback! Please share your thoughts here, and I will review them as soon as possible. However, I am attending a funeral this morning. Your input is truly valuable and welcomed. Thank you!
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User Jim999 commented: "I'm back! Let's get the discussion going! 😄 Click to expand... I believe the reason there hasn't been much feedback, myself included, is that your explanation is somewhat unclear. For example, when you set the minimum to 0 m3/hr and the maximum to 500 m3/hr, why are you receiving a constant readout of 2500 m3/hr? Is this readout displayed on the HMI, a gauge, or somewhere else? What modifications have you made to the HMI or the data entry for the min/max fields? Additionally, how can you be certain that the PLC recognizes the minimum as 0 and the maximum as 500? This might be why you're not seeing any change in the readout."
Thank you for your response, Tragically. I’m encountering an issue where the readout on the Human Machine Interface (HMI) remains unchanged. The primary challenge is that we lack full access to the entire system, which means I need to troubleshoot the HMI remotely in the field. I understand my previous message was a bit unclear; this is indicative of my current situation. I’m hoping to connect with someone experienced in using Unity Premium PLC and Schneider (formerly known as Telemecanique) who can provide valuable insights and guidance. Your expertise would be greatly appreciated!
Jim999 expressed gratitude in his response to Tragically, stating: "I appreciate your reply. Unfortunately, the readout on the Human-Machine Interface (HMI) remains unchanged. The main challenge we face is the lack of access to the complete system, forcing me to troubleshoot directly through the HMI in the field. I realize my previous post may have been unclear, which reflects my current situation. I was hoping that someone experienced with Unity Premium PLCs and Schneider Electric (previously known as Telemecanique) could provide some insights. To elaborate, I've programmed thousands of Schneider Magelis HMIs and Premium PLCs, but the complexity of your issue is application-specific. Without visibility into the HMI and PLC configurations, any advice will inherently be speculative."
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