DIGIVEX Little Drive Servoamplifier
78
PVD 3530 GB 01/2005
Drive output current
There are two forms of monitoring:
♦
Short-circuit protection: monitoring of current drift.
♦
Excessive output current (maximum current). Check whether the current as
measured exceeds the drive pulse current by 30%.
In both cases, there is stoppage due to the "DRV OK" output shifting to logic 0 which
must induce the opening of the main contactor.
7.2.1.3 Temperature monitoring
DIGIVEX Little Drive dissipater temperature
♦
If the temperature is less than 85°C at the dissipater, nothing happens.
♦
Between 85 and 109°C, there is a reduction in the pulse current which can
release the ("7-segment" display flashes at low frequency).
♦
At 110°C, stoppage of the amplifier
Servo-motor winding temperature
Each motor has a thermal sensor. When customizing the drive, this sensor can be
taken into account or ignored. If it is taken into account (usual case), excessive motor
temperature causes a fault.
Ambient temperature
This is measured between the electronic boards and operations are stopped when it
exceeds 60°C.
7.2.1.4 Monitoring the DC Bus voltage
Recovery fault:
Motion controller electrical breaking capacity needs updating, cycle too restricting.
Bus overvoltage
Motion controller breaking capacity much too low with regard to the application.
7.2.1.5 Other monitoring
No resolver
Resolver fault or wiring fault.
Overspeed
Speed > 1.15 times the maximum motor - drive setting.
These two cases entail a fault with:
Data displayed on the 7-segment display
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