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5-2
The Man-Machine Interface (MMI)
LED Indications
There are six LEDs that indicate the status of the Converter. Each LED is considered to operate
in two different ways:
OFF
ON
the LEDs have the following meanings:
HEALTH
RUN
START CONTACTOR
PROGRAM STOP
OVER CURRENT TRIP
COAST STOP
In normal run condition, all LEDs on the MMI are illuminated. Any LED which is off indicates
a condition which prevents operation of the controller.
HINT:
The general rule for LED indications is
"ON IS GOOD, OFF IS BAD"
The LEDs are labelled HEALTH, RUN, START
CONTACTOR, PROGRAM STOP, OVER
CURRENT TRIP, and COAST STOP. The status of
Converter State
Drive fault condition
Drive normal condition
Converter State
Drive not enabled:
•
the thyristor bridge is disabled
•
the main contactor control relay is de-energised
•
an alarm is present
Drive in run condition
Drive is healthy (as indicated by the HEALTH LED)
Ready (which requires a Start instruction) and enabled;
indicates that the controller is in a normal run condition.
The main contactor control relay is energised and the
thyristor bridge is enabled.
Converter State
Start contactor is Open
Start contactor is Closed (by a start instruction). The drive
is healthy
Converter State
The program stop line is open and the program stop is
carried out until main contactor drop-out occurs
No program stop (+24V is applied to terminal B8)
Converter State
Armature current exceeded 280% full load. The drive has
tripped, refer to Chapter 7: "Trips and Fault Finding" -
Trip Messages (OVER I TRIP)
Armature current normal
Converter State
Hardware stop by main contactor drop-out
Stop not active (+24V is applied to terminal B8)
590 Series DC Digital Converter
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