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Programming Your Application
6-37
590+ Series DC Digital Converter
FIELD CONTROL
Parameter
Tag
Range
FIELD ENABLED
169
DISABLED / ENABLED
Refer to the DIAGNOSTICS function block description, page 6-23.
FIELD DEMAND
183
xxx.xx %
Refer to the DIAGNOSTICS function block description, page 6-23.
FLD. FIRING ANGLE
184
xxx.xx DEG
(FLD.FIRING ANGLE)
Refer to the DIAGNOSTICS function block description, page 6-23.
FIELD I FBK
300
xxx.xx %
Calibrated field current feedback.
Note: if the current feedback is calibrated correctly the FIELD I FBK and UP TO FIELD
diagnostics will operate.
FIELD I FBK.AMPS
539
xxx.xx A
FIELD I FBK calibrated in Amps.
UP TO FIELD
618
FALSE / TRUE
Field current feedback is above FIELD I THRESHOLD when TRUE. This may be used as
part of a mechanical brake release strategy.
FIELD ENABLE
170
DISABLED / ENABLED
Enables and disables the drive motor Field Control.
FLD CTRL MODE IS
209
See below
(FLD CTRL MODE)
Selects between open-loop VOLTAGE CONTROL or closed-loop CURRENT CONTROL.
RATIO OUT/IN
210
0.00 to 100.00 % (h)
(FLD.VOLTS RATIO)
Sets the output dc field voltage as a ratio of the RMS FIELD supply voltage when FLD
CTRL MODE is set to VOLTAGE CONTROL.
SETPOINT
171
0.00 to 100.00 %
Field current setpoint as percentage of calibrated value.
PROP. GAIN
173
0.00 to 100.00
This is the proportional gain adjustment of the field current PI loop. The default of 0.10 is
equivalent to a real gain of 10.
INT. GAIN
172
0.00 to 100.00
This is the integral gain adjustment of the field current PI loop.
FLD. WEAK ENABLE
174
DISABLED / ENABLED
Activates the additional motor back emf PID loop for field weakening (field spillover)
control.
EMF LEAD
175
0.10 to 50.00
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.
With a default of 2.00, real time constant = 200ms.