Eurotherm 590L Series, Product Manual, Page: 81 / 170

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Field current setpoint.
Range:
0.00 to 100.00%
Default: 100.00%
Slot: 2099
LINK Value Range: 0.0 to 100.00%
3523 1# *$,1
This is the proportional gain adjustment of the field current PI loop.
Range:
0.00 to 100.00
Default: 0.10 (real gain = 10)
Slot: 2106
LINK Value Range: 0.0 to 100.00%
,17 1# *$,1
This is the integral gain adjustment of the field current PI loop.
Range:
0.00 to 100.00
Default: 1.28
Slot: 2105
LINK Value Range: 0.0 to 100.00%
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These parameters are within a sub menu under "FLD CURRENT VARS"
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In certain applications of a DC motor controller high speeds can only be achieved by reducing
the field current and therefore the resultant torque. This is termed as the Constant-Horsepower
region or Field-Weakening region and the speed at which it begins is known as the Base Speed.
The field weakening enable activates the additional motor back EMF PID loop for field
weakening (field spillover) control.
Range:
ENABLED/DISABLED
Default: DISABLED
Slot: 59
LINK Value Range: 1 / 0
(0) # /($'
With field weakening control enabled a PID loop is brought into operation. This is the lead time
constant adjustment of the field weakening PID loop.
Range:
0.10-50.00
Default: 2.00 (real time constant = 200 msecs)
Slot: 2108
LINK Value Range: 0.0 to 100.00%
(0) # /$*
This is the lag time constant adjustment of the field weakening PID loop.
Range:
0.00 to 200.00
Default: 40.00 (real time constant = 4000 msecs)
Slot: 2109
LINK Value Range: 0.0 to 100.00%
(0) # *$,1
This is the gain adjustment of the field weakening PID loop.
Range:
0.00 to 100.00
Default: 0.30 (real gain = 30)
Slot: 2110
LINK Value Range: 0.0 to 100.00%