Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 163)

Publication 8720MC-IN002A-EN-P — December 2002
Programming Parameters C-51
Name: +Dyn_Iq_Limit Data Display: Signed Decimal R/W
Parameter No.
519
File:
Control
Group:
Torque Description: The positive dynamic Iq limit defines the maximum positive torque producing current available in the
motor/inverter system. A value of +100% is defined as the motor or drive rated current, whichever is less. This
value can change dynamically based on peak capability, motor 12T fold back protection, inverter I
2
T fold back
protection, user torque limits, or bus voltage headroom limits. Related to this, parameter 520 indicates the source
of real time limits in the system described above.
Default:
0.0 Length
2 bytes SCANport Min/Max
Min.
≥ -1000.0
Max. ≤ +1000.0
SCANport Scaling Resolution
1=.1% Units
%
Default:
0 Length
2 bytes SERCOS/DPI Min/Max
Min. ≥ 0
Max.
≤ +2 15
- 1
SERCOS/DPI Scaling Resolution
Scaling type: parameter 86
Scaling factor: parameter 93
Scaling exponent: parameter 94 Units
parameter
86
Name: Cur_Limit_Source Data Type: ASCII Representation of Enumeration R
Parameter No.
520
File:
Status/Faults
Group:
Drive Status Description: This parameter displays the present source, if any, of an 8720MC Drive.current limit request.
Structure of the current limit source:
Bits 3 - 0
0000 = Not limited
0001 = Negative user current limit
0010 = Positive user current limit
0011 = Amplifier peak limit
0100 = Amplifier I
2
T foldback
0101 = Regenerative energy limit
0110 = ± User current limit
0111 = Motor peak limit
1000 = Motor I
2
T foldback
1001 = Bus voltage headroom limit
Default:
0 Length
2 bytes Minimum/Maximum
N/A Scaling Resolution
N/A Units
N/A
Name: PWM_Frequency Data Type: Integer R
Parameter No.
522
File:
Motor/Drive/
Fdbk
Group:
Drive Data Description: The PWM frequency is matched to the connected motor to minimize the audible noise without
reducing the motor and amplifier thermal capacities. This parameter should not be changed for any standard
MPL-B8xxx, -B9xxx, or 8720SM motor.
Default:
4000 hz Length
2 bytes Minimum/Maximum
1000 to 30,000 Scaling Resolution
1 = 1hz Units
hz