IMPULSE•G+/VG+ Series 4 Technical Manual
November 2022
Page 105
5.2.19 Weight Measurement
Weight Measurement is used in hosting applications and can calculate a load weight based on motor torque at a
constant speed. The VFD 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 once per lift when C10-02 = 0
(Automatic), or it can be configured to take a reading at any speed with an MFDI when C10-02 = 1 (Manual). The
calculated weight can be displayed on the keypad.
NOTE:
Weight Calculations will be more consistent when a weight measurement is calculated at the same speed
every time. Example: C10-02 = 2, weight measurement is always calculated at C10-05 speed. It is important to
note that after the load has been rigged, it should be suspended. When the next raise command is given, the
hoist is now ready to calculate the weight of the load. The function only works in the Raising motion (Fwd). If
extreme accuracy is required, a load cell should be used. The Weight Measurement function has an accuracy
within 5% with VG+ VFDs and 10% with G+ VFDs of the hoist’s rated capacity.
Table 5-35: Weight Measurement Parameter Settings
Parameter
Display
Function
Range
Default
C10-01
Load Weight
Selects method for Load Weight measurements.
0–2
0
0 Disabled
1 Auto - I/T
Enabled. Measures weight via current/torque.
2 Auto-Analog
Enabled Analog (Load Cell)
C10-02
LW Start
Load Weight Measurement Trigger
0-2
0
0 At C10-05
Weight is measured once when at the C10-05
speed.
1 By MFDI=5C
Weight is measured when the MFDI = 5C input is
turned on.
2 Always @ C10-05
Weight is continuously measured when at the
C10-05 speed.
C10-03
LW Display Hold
Hold the displayed weight until next run
command
0, 1
0
0 Hold Display
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.
Example: 24000 = 40.00
0–39999
0
C10-05
Test Freq
Frequency at which the Weight Measurement
will occur.
0–E01-04 Hz
6
C10-06
Unit Displayed
Units of measurement being displayed on the
keypad.
0–4
4
0 Tons
1 Pounds
2 Kilograms
3 Metric Tons
4 Percent Load
C10-07
Holding Time
Time for holding output frequency to measure
weight.
0.0–2.55 sec
0.50
C10-09
Full Load Torque
Percentage of Torque output that is considered
full load (VG+ only).
0.0–200.0%
100.0
C10-10
No Load Torque
Percentage of Torque output that is considered
no load (VG+ only).
0.0–200.0%
20.0
