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GE Energy
D20/D200
Installation and Operations Guide
General 994-0078-2.00-7
Full
115
Operation
D20ME/ME II
Main Board
The front panel has four LED indicators, providing a visual indication of the
operational status of the unit:
•
ALARM: LED is not implemented
•
FAIL: driven by a programmed signal. Indicates that diagnostics are running or
have failed
•
HALT: driven by the halt line input of the microprocessor. Indicates that MPU
has stopped
•
RUN: driven by the address strobe line on the microprocessor. Indicates any
microprocessor activity
I/O Peripherals
Common LEDS
The WESDAC/WESTERM Peripheral pairs have a common section made up of
components on the WESDAC and WESTERM boards. There are seven LED
indicators on this common section.
LED Name
Designation
Normal RUN
Not Initialized
DS1 Power
On
On
On
DS2
MPU Run
Flash 10/sec
See Next Table
DS3
Tx1
Flickers Constantly
Depends on Nature of
Fault
DS4
Rx1
Flickers Constantly
Depends on Nature of
Fault
DS5 Tx2
Configuration
Dependent
Depends on Nature of
Fault
DS6 Rx2
Configuration
Dependent
Depends on Nature of
Fault
DS7
Fault
Off
See Next Table
Содержание D20
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