In an industry, 18 temperature sensors fault leads to plant shutdown and learn the root cause analysis of the incident.

Today, we are going to discuss an incident in which data from 18 temperature transmitters (or tags) were lost on PLC for about half an hour and started showing 0 deg centigrade temperature instead of the real-field value.

Temperature Sensors Fault

Let us see this incident.

In one area of a plant, suddenly readings of 18 temperature tags went 0 degrees centigrade.  Already, 18 tags were showing 0 degrees centigrade because of issues in some instrumentation systems. So, now a total of 36 tags were showing 0 degrees centigrade.