TM120/TM150 Temperature Alarm Channel 1

What does A35212 mean?

This alarm is initiated when the actual temperature (r4105[1]) for channel 1 on Terminal Module 120 (TM120) or Terminal Module 150 (TM150) exceeds its configured alarm threshold (p4102[2]). A timer (p4103[1]) is also started. The alarm will clear once the temperature falls below the threshold, factoring in the defined hysteresis (p4118[1]).

• Slightly increased environmental temperature affecting the TM120/TM150 module or the component monitored by channel 1.
• Elevated average load on the equipment connected to channel 1, causing its temperature to rise above typical idle conditions.
• Reduced effectiveness of the cooling system (e.g., partially blocked vents, aging fan) for the TM120/TM150 or the monitored component on channel 1.
• Minor inaccuracies in the temperature sensor on channel 1, resulting in r4105[1] reporting a value slightly higher than actual.
• The alarm threshold p4102[2] (Temperature alarm threshold channel 1) is set very close to the component's normal operating temperature.

Click steps to track your progress.

1. 1

   Verify the current operating temperature of the component monitored by channel 1 using an external thermometer, checking against r4105[1].

2. 2

   Inspect and clean all cooling apertures, filters, and fan blades on the TM120/TM150 and the equipment attached to channel 1.

3. 3

   Review recent changes in process variables or production rates that could lead to an increase in the operating temperature of the channel 1 component.

4. 4

   Confirm that parameter p4102[2] (Alarm threshold channel 1) provides a suitable warning margin before a critical fault condition occurs.

5. 5

   Continuously observe r4105[1] to detect any further temperature increase that might necessitate immediate action or a fault shutdown.