At each starter the status of the motor either running or stopped should be displayed, green for running and red for stopped. For uniformity of indication colours, the colours of the indicator lenses should match the colours of the control panel indicator push buttons.
At the local control station there is no indication as the operator can see the motor that is if there is adequate lighting in the area of the motor, that’s the best indication of all and it is foolproof, that is foolproof if there are no stroboscopic lighting effects which show it as stopped when it is running. (A point for lighting engineers to note.) This also assumes that the advice on the location of the local control station has been heeded.
At each control panel it is essential that the status of the motor is displayed, the use of indicator push buttons enables maximum information in the minimum of space. Indication should be arranged so that when a button is pressed it illuminates when the action requested has been completed, as always there are exceptions when control is at the control panel a fault should cause the fault indicator to flash and the alarm to sound, cancelling the fault should cause the indicator to go steady and the alarm to stop sounding. The fault indicator should only extinguish when the fault is reset at the starter. If control is elsewhere then the indicator should illuminate on fault but the audible alarm should not function. When the motor is in automatic an automatic running indicator should illuminate whenever the motor runs.
SCADA indication should reflect the motor status in a similar way to the control panel indication, the main benefit of SCADA is that much more information may be displayed for each motor.