Parker 590 series, Product Manual

Page: 104 / 242

6-14
Programming Your Application
590 Series DC Digital Converter
CURRENT LOOP
This function block allows user
parameterisation of the conventional
current/torque loop of the converter.
CURRENT LOOP
– AT CURRENT LIMIT [ 42] – FALSE
– CURRENT FEEDBACK [298] – 0.00%
–
CURRENT DEMAND [299]
–
0.00%
100.00 % – [ 15] CUR. LIMIT/SCALER –
200.00 % – [421] MAIN CURR. LIMIT –
45.00
–
[ 16] PROP GAIN
–
3.50 – [ 17] INT. GAIN –
– AUTOTUNE [ 18] – OFF
12.00 % – [137] DISCONTINUOUS –
0.00 %
–
[ 30] ADDITIONAL DEM
–
DISABLED – [ 90] BIPOLAR CLAMPS –
ENABLED – [201] REGEN MODE –
100.00 % – [301] POS. I CLAMP –
-100.00 %
–
[ 48] NEG. I CLAMP
–
DISABLED – [119] I DMD. ISOLATE –
– ILOOP SUSPEND [ 46] – TRUE
MMI Menu Map
1 SETUP PARAMETERS
2 CURRENT LOOP
CUR. LIMIT/SCALER
MAIN CURR. LIMIT
PROP GAIN
INT. GAIN
AUTOTUNE
DISCONTINUOUS
ADDITIONAL DEM
BIPOLAR CLAMPS
REGEN MODE
POS. I CLAMP
NEG. I CLAMP
I DMD. ISOLATE
Parameter Descriptions
CUR. LIMIT/SCALER Range: 0.00 to 200.00 %
Current limit scaler. It scales bipolar/unipolar clamps.
MAIN CURR. LIMIT Range: 0.00 to 200.00 %
Main current limit parameter which is independent of current limit scaler and in series with the
other three current limit blocks.
PROP GAIN Range: 0.00 to 200.00
Proportional gain control for armature current PI loop. This parameter is set during the autotune
function.
INT. GAIN Range: 0.00 to 200.00
Integral gain control for armature current PI loop. This parameter is set during the autotune
function.
DISCONTINUOUS Range: 0.00 to 200.00 %
Discontinuous-to-continuous mean armature current boundary level. This parameter is set during
the autotune function and affects the performance of the adaptive algorithm.
ADDITIONAL DEM Range: -200.00 to 200.00 %
Additional current demand input.
BIPOLAR CLAMPS Range: ENABLED/DISABLED
Select input for bipolar (asymmetric) or unipolar (symmetric) current clamps for the 4 quadrants
of operation. Default setting of DISABLED means UNIPOLAR clamps selected.
REGEN MODE Range: ENABLED/DISABLED
Select input for regenerative (4-quadrant) or non-regenerative (2-quadrant) mode of operation. If
the stack is a 2-quadrant (only one thyristor bridge) this parameter should be set to Disabled.
Note: we recommend that this parameter is not changed whilst the machine is running.
POS. I CLAMP Range: -200.00 to 200.00 %
Positive current clamp in Bipolar Clamp mode.
NEG. I CLAMP Range: -200.00 to 200.00 %
Negative current clamp in Bipolar Clamp mode.
Note on bipolar current clamps: t hese clamps in bipolar mode can cross-over onto the same
quadrant as long as the POS. I CLAMP is always greater (algebraically) than the NEG. I
CLAMP.