
What is my process doing? The operator says during this operation the levels are not controlling at the setpoint…
Facing mysterious PLC control issuesTest in your automation system? Studio 5000 Trends PLC diagnosis tools can help you troubleshoot in real-time by graphing tag values over time. This powerful feature in Allen Bradley’s Studio 5000 lets you monitor up to eight tags at once, making it easier to spot issues like erratic signals or timing errors. Here’s how to use Trends in five simple steps.
Why Trends Are Essential for PLC Diagnosis
Trends in Studio 5000 act like a software oscilloscope, plotting tag data on a graph for real-time analysis. They’re perfect for diagnosing issues in PLC-controlled systems, such as unexpected motor stops or sensor failures, saving hours of manual debugging.
5 Steps to Set Up Trends in Studio 5000
- Go Online with Your Controller: Ensure you’re connected to an Allen Bradley PLC via Studio 5000 (Trends don’t work offline).
- Create a New Trend: Right-click the “Trends” folder in the Controller Organizer and select “New Trend.” Name it and set a sample period (e.g., 100 ms).
- Select Tags to Monitor: Add up to eight tags (e.g., motor speed, pressure) in the “Pens” tab of Chart Properties. Choose tags relevant to your issue.
- Configure Chart Settings: Right-click the Trend window, select “Chart Properties,” and adjust the X-axis (time span, e.g., 2 minutes) and Y-axis (value range, e.g., 0–100). Disable auto-scaling for clarity.


- Run and Analyze: Click the “Run” button to start plotting. Watch for anomalies like spikes or drops, and use the value bar to check specific data points.
Ready to Diagnose Faster?
Using Studio 5000 Trends for real-time PLC diagnosis simplifies troubleshooting and boosts uptime. Start monitoring your tags today! Need help setting up Trends?
Explore more helpful troubleshooting tips at Studio 5000 Logix Designer Online Help here. Let Automation Ready Panels design and program your next PLC control system today! Contact Us