IMPULSE•G+/VG+ Series 4 Technical Manual
November 2022
Page 102
5.2.17 Emergency Lift
Emergency Lift (E-Lift) is a VG+ feature that allows operation of the VFD in the event of an encoder related fault
(PGO-1-S/PGO-1-H) that resulted from a defective encoder, encoder cable, or PG-X3 option card. E-Lift can be
enabled with a Multi-Function Digital Input (H01-xx = 44) under the condition that all run commands have been
removed and the VFD is not outputting voltage.
When E-Lift is active, the VFD will switch to the control method set in E03-01. In hoist applications, it is highly
recommended to leave E03-01 set to OLV, which will ensure proper control of the load. Furthermore, all functions
that depend on encoder feedback will be disabled. The Test Mode Configuration parameters (E03-xx group) are
active during E-Lift operation instead of the E01-xx parameters. By default, the E-Lift function may only remain
operational for 10 minutes (user-adjustable by C08-37), after which a fault will be generated.
5.2.17.1 Emergency Lift Setup
1.
Auto-Tune the motor:
Complete an Auto-Tune for the motor described in
2.
Configure the E03 Parameter Group - Test Mode Configuration:
When E-Lift is active, the Test Mode parameters are used for voltage and frequency limits instead of the E01
group. The E03 group should be configured as described in
3.
Configure the E-Lift Parameters:
The parameters listed in
are used to configure the E-Lift function.
Table 5-33: Emergency Lift Parameter Settings
Parameter
Display
Function
Range
Default
C08-35
Emergency Lift
Determines if the E-Lift function is enabled.
0, 2
0
0 Disabled
2 Enabled by MFDI
C08-36
ELift Max Speed
Maximum frequency when E-Lift is active.
0–150 Hz
30
C08-37
ELift Max Time
Maximum time that E-Lift can be active.
0–6000 sec
600
DANGER
E-Lift is designed to allow for temporary hoisting operations of motors normally equipped with an encoder in
Flux Vector control. Always follow instructions given in the E-Lift setup guide, and use extreme caution when
operating a hoist in E-Lift mode. Stop the hoist if any undesired motion occurs and contact Magnetek for
additional assistance.
DANGER
Do NOT set E03-01 = 0 (V/f Control) when using E-Lift in hoist applications. E-Lift is designed to operate using the
Open Loop Vector (OLV) control method. The use of the V/f control method may cause undesired motion of the
load and is only intended for troubleshooting Flux Vector control method related problems.
