Scenerio:
Each change of state color also includes a confirming graphic feedback to compensate for color blindness.
State | Color | Feedback |
1. ON | green | solid |
2. ALARM | red | flash w/ diagonal line |
3. INTERMITTENT | violet | flashing |
4. DEFECTIVE | aqua | inner red 'not' symbol |
5. NORMAL OFF | grey | "X" lines |
Example of how the various states could be applied: The central monitoring panel PID loop graphic
includes two(2) pilot lights; one associated with the field controller, and the other monitoring the modulating actuator's controlled device (e.g. valve, damper, etc.) position locally.
State | PID Controller | Actuator |
ON | Local circuit active | Actuator's device fully open |
ALARM | Local circuit failure | Local circuit failure |
INTERMITTENT | Not applicable | Actuator's device modulating |
DEFECTIVE | Under repair | Under repair |
NORMAL OFF | Local circuit off | Actuator's device fully closed |