4.5 LED
4.5.1
Introduction
The LED module is a unidirectional means of communicating. This means that
events may occur that activate a LED in order to draw the operators attention to
something that has occurred and needs some sort of action.
4.5.2 Status indication LEDs
The three LEDs above the LCD provide information as shown in the table below.
LED Indication Information
Green:
Steady In service
Flashing Internal failure
Dark No power supply
Yellow:
Steady Dist. rep. triggered
Flashing Terminal in test mode
Red:
Steady Trip command issued
4.5.3 Indication LEDs
The LED indication module comprising 15 LEDs is standard in 670 series. Its main
purpose is to present an immediate visual information for protection indications or
alarm signals.
Alarm indication LEDs and hardware associated LEDs are located on the right
hand side of the front panel. Alarm LEDs are located on the right of the LCD
screen and show steady or flashing light.
•
Steady light indicates normal operation.
• Flashing light indicates alarm.
Alarm LEDs can be configured in PCM600 and depend on the binary logic.
Therefore they can not be configured on the local HMI.
Typical examples of alarm LEDs
• Bay controller failure
• CB close blocked
• Interlocking bypassed
• Differential protection trip
• SF6 Gas refill
1MRK 502 014-UEN C Section 4
Understand the local human-machine interface
21
Operator's manual
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