IMPULSE•VG+ Series 3 Instruction Manual – 07/25/05
5-35
Weight Measurement
The IMPULSE•VG+ Series 3 includes a Weight Calculation function that can be used in hoisting
applications. The weight measurement calculation is based on motor torque at a constant speed. the
drive must pause the acceleration, wait for the torque to stabilize and then perform the weight
calculation based on the system tare values. The function takes a reading one time per lift (Raise Run
command) when C10-01 = 1 or 3 (Automatic) or it can be configured to take a reading at any speed
with a Multi-function input when C10-01 = 2 or 3 (Manual). The calculated weight can be displayed
on the keypad of the hoist drive or by an external display device connected to an analog output of the
hoist drive.
NOTE: Weight Calculations will be more consistent when a weight measurement is calculated at the
same speed every time. Example: C10-01 =1, Weight measurement is always calculated at C5-
04 speed. It is important to note that after the load has been rigged, it should be suspended and
the brakes should be set on the hoist. When the next raise command is given, the hoist is now
ready to calculate the load weight. The function only works in the Raising motion (Fwd Run).
If extreme accuracy is required, a load cell should be used. The Weight Measurement function
of the hoist drive should be within 5% or better accuracy of the rated capacity.
Parameter
Code Display Function Range
Initial
Value
Access
Level
C10-01 Load Weight 0/1 Determines whether Load Weight is
enabled.
0~4 0 Adv
0 Disabled
1 Enabled at C5-04 (Automatic for the duration of C5-12 + C5-13)
2 Enabled at MFI=5C
3 Both Auto & MFI=5C
4 Analog Input (Load Cell) MFAI=16
C10-02 Torque Pri Delay Torque Output Calculation primary
delay time.
0–1000 msec 200 Adv
C10-03 LW Display Hold 0, 1 0 Adv
0 Hold Display Until next run command is on
1 Hold Disp 3 sec
C10-04* ** LW Conversion Multiplier of torque output calculation
for display. Data is n0000, so
multiplier is 10000; “n” is decimal
point.
00000–39999 0 Adv
C10-05 Full Load Torque Percentage of Torque Output that is
defined as Full-Load Torque Output.
0.0–200.0% 100.0 Adv
C10-06 No Load Torque Percentage of Torque Output that is
defined as No-Load Torque Output.
0.0–200.0% 20.0 Adv
C10-07** Unit Displayed Determines “weight” measurement
units in which the parameter settings
will be expressed. The unit
abbreviations appear on line 2 of the
display
0~4 0 Adv
0 Tons
1 Pounds
2 Kilograms
3 Metric Tons
4 Percent Load
C10-08 Weight Limit Output Turn on Level for MFO=33 0.0-200.0% 125% Adv
Weight Measurement enabled by
Multi-Function Input = 5C.
*For an example, please refer to Table 5.14 on page 5-88.
** Used for keypad display; consult factory for assistance.
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