Olv And Flv Operation (A01-02 = 02 And 03); Load Check Ii Set Up (C05-01 = 09) - Magnetek Impulse G+ series 4 Instruction Manual

OLV and FLV Operation (A01-02 = 02 and 03)

When using Load Check II in Open Loop Vector or Flux Vector control method, the IMPULSE
and VG+ Series 4 will compare the motor torque readings (U01-09) to values stored during the Load
Check set up process. If they exceed the values for the active Load Check Zone, the IMPULSE
and VG+ Series 4 will stop the motor based on the LC Alarm Action (C05-02) and displays a Load
Check alarm (LC).
NOTE: If an application requires Load Check to be bypassed, an MFDI may be programmed to 69
(N.O.) or 6A (N.C.).
NOTE: The Load Check II function will alter the acceleration time, depending on loading.
Therefore, it must be disabled when using two or more hoists to lift a single load. Use
MFDO H01-0x = 69 or MFDO H01-0x = 6A to bypass Load Check.

Load Check II Set Up (C05-01 = 09)

The Load Check II set up procedure will quickly measure and calculate the current or torque
required at each of the Load Check Zones starting with the rated load suspended. These values will
automatically be stored in parameters C05-09 through C05-24 during the Load Check II set up
process.
The following steps are required to perform the Load Check II set up process.
1. Verify that when the Master Switch is at full deflection (the highest speed point if stepped, or 10V
if Analog), the Frequency Reference shown in U01-01 is equal to Motor Base Frequency shown
in E01-06 (typically 60Hz). For example, with a 3-Step speed reference, if B01-03 is set at 60Hz,
then the frequency reference should be 60Hz when the Master Switch is pushed to full
deflection. If the frequency reference doesn't reach Motor Base Frequency, set the following
(depending on Speed Ref):
• Multi-Step: B01-0x is 60Hz
• Infinitely Variable: B02-01 = 100%
• Analog: H03-03 = 100% and B02-01 = 100%
2. The motor should be properly Auto-tuned.
• FLV and OLV operation – Rotational Auto-tune.
• V/f operation – Stationary Auto-tune.
3. Check that B02-03 and E01-09 are at their desired values. If you change these values, re-run
Load Check II setup.
4. Motor should be at normal operating temperature for the application (operate at or near rated
capacity for at least 10 minutes) before performing the Load Check set up process.
5. Suspend the rated load just off of the ground (this allows for accurate measurements during
calibration).
6. Set C05-01 equal to 9.
7. Press and hold the Hoist (Up) command button on the pendant or radio for full speed operation
(60 Hz).
NOTE: The Load Check set up process can be temporarily paused by lowering the load back to
the ground, keeping the load suspended, then pressing and holding the Hoist (Up)
command button at full speed until the Load Check set up process is complete.
8. When the Load Check set up process finishes its calculations, the drive will decelerate the load
to indicate the set up calibration is complete.
9. Press the Lower (Down) command to complete the Load Check set up process and lower the
load to the ground.
IMPULSE®•G+ & VG+ Series 4 Instruction Manual – February 2017
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