PG DRIVES TECHNOLOGY
71
CHAPTER 3 - PROGRAMMING
SK77898/2
8 Motor Parameters
8.1 Current Limit Max., Current Limit Min., Current Foldback -
Threshold, Time, Level, & Temperature
These parameters affect the VR2s current output with relationships to time and internal
VR2 temperature.
The parameters associated with the Motors are:
Current Limit Max.
This is the current the VR2 can deliver until the programmed value of Current
Foldback Temperature is reached.
Programmable between 20 and the Control Systems Maximum in steps of 1
Amp
Current Limit Min.
This is the current the VR2 will deliver at 80°C internal temperature.
Programmable between 20 and Current Limit Max in steps of 1 Amp
Current Foldback Threshold
This parameter sets the level of current which when exceeded activates the
Current Foldback Time parameter.
Programmable between 20 and the Current Limit Max in steps of 1 Amp
Current Foldback Time
This parameter sets the maximum time the control system can be at current
Foldback Threshold before the control system begins to reduce the available
current.
Programmable between 0 and 250 in steps of 1 Second
Current Foldback Level
This parameter sets the percentage of current foldback when the control
system is at the Current Foldback Threshold for a period greater than current
Foldback Time. The value is a percentage of the programmed Current Limit
Max.
Programmable between 1 and 100 in steps of 1%.
Current Foldback Temp.
This parameter sets the temperature within the control system at which the
current starts to reduce linearly.
Programmable between 25 and 80 in steps of 1 Degrees C
It is important that the maximum values stated in the table
VR2 Current Management are not exceeded.
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