Leds Vs. Mcu Status; D20 Power Supply Leds - GE D20 Installation And Operation Manual

D20/D200
Installation and Operations Guide
Operation
, continued
LEDs vs. MCU The MPU Run and Fault LEDs, DS2 and DS7, together indicate the MCU's
Status operating status.
MPU Run LED
(alternating)
(simultaneously)
D20 Power On the chassis-mounted D20 Power Supplies there are LED indicators for each of
Supply LEDs the supply voltages. The indicators are illuminated green when that voltage is
present.
D20EME LEDs The following table explains the operational function of the four LED indicators:
BATT 1 LED
BATT 2 LED
POWER LED
ACCESS LED
116
Fault LED
Flash Off
Flash Off
Flash Flash
(alternating)
Off Flash
Flash Flash
(simultaneously)
Name
Lights when battery voltage drops below 3 Volts. Replace
battery immediately.
+5 Volts power is available.
Indicates D20EME is being accessed from VME bus.
994-0078-2.00-7
Flash MCU Operating Status
Period
(s)
0.1 Applications downloaded and
operating
0.75 Applications downloaded but not
operating
0.75 Applications not downloaded and
only ROM operating
0.5 EPROM checksum error
0.5 RAM error: device address error
Function
GE Energy
General
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