If all the green LED's are lighted, then there will be no alarms sent to the Alarm System. Should one input fail, its red LED will light, its associated green LED will go out, and an alarm signal will be sent to the appropriate input for display on the annunciator panel. Operators must then open the doors on the back of the control console to find which red LED is lighted. The LEDs are clearly labeled so that the offending circuit can be easily traced. It's just like having almost 100 chart recorders without the mess and inconvenience of paper and ink.
All data is recorded to disk for future reference.
Graphics screens can be configured which depict the steam plant piping, plant layout, etc. Realtime data is displayed on these graphics templates to allow operators to easily trace pipe lines or processes. It is important to note that this computer is for monitoring purposes only and completely non-interactive to the steam plant while the plant is on line. Similarly, there is nothing that can be done from the computer to affect any plant process or equipment, so the operator can feel free to explore the capabilities of the trending features with no concerns for accidentally affecting the plant. The simulator will mimic the boiler in all respects.