19
P/N: 192047082 (REV AD) 627NH
March 2022
VARIABLE SPEED ELECTRIC CHAIN HOIST WITH
OPTION
LIMIT SWITCH (EPLS) ADJUSTMENTS
If limit switch operation has been checked as described on page 12
and is not operating correctly or is not automatically stopping the
hook at a desired position, proceed as follows:
NOTE:
If you purchased the available Intelli-Connect wireless
operator, limits can be adjusted through the interface. If you have
the available cable and your hoist was built with an external data
port, limits can be adjusted without removing the cover. Otherwise,
proceed with these instructions to alter limits without this interface.
1. Disconnect hoist from power supply.
2. Remove the back frame cover.
3. Reconnect the hoist to the power supply.
Clearing Limits
1. Navigate to parameter C3.12.
2. Change the value to “0” and press enter.
3. Exit programming mode.
Setting Upper Limit Switch
1. The “A” Dimensions in Table 10 are the minimum distances that
should be set between the top at hook block and the bottom of
the hoist.
2. Operate the hoist in the UP direction until the hook block is at
the desired upper limit position.
NOTE:
Actual limit position may
vary from initial set position. See dimension “C” in Table 10.
3. Navigate to parameter C3.12 of the VFD (see programming
section).
4. Change the value to “2” and press enter.
5. Exit programming mode.
6. Check upper limit function and position. If adjustment is desired,
refer to the “C” dimension to determine the minimum adjustment
from the current setting.
7. Repeat steps 2-6 as necessary to achieve desired limit position.
8. Set lower limit.
CAUTION: THE “A” DIMENSIONS ARE THE MINIMUM ALLOWED
FOR SAFE OPERATION AND SHOULD NOT BE REDUCED.
Setting Lower Limit Switch
1. The “B” dimensions in Table 10 are the minimum length of loose
end chain left on the non-load side of the liftwheel when the
hook is positioned at the lowest allowable hook position.
2. Operate the hoist in the DOWN direction until the hook block is
at the desired lower limit position.
NOTE:
Actual limit position
may vary from initial set position. See dimension “C” in Table 10.
3. Navigate to parameter C3.12 of the VFD (see programming
section).
4. Change the value to “3” and press enter.
5. Exit programming mode.
6. Check lower limit function and position before placing the unit
into service. If adjustment is desired, refer to the “C” dimension
to determine the minimum adjustment from the current setting.
7. Repeat steps 2-6 as necessary to achieve desired limit position.
8. Disconnect the hoist from the power supply.
9. Reinstall the end cover.
CAUTION: THE “B” DIMENSIONS ARE THE MINIMUM ALLOWED
FOR SAFE OPERATIONS AND SHOULD NOT BE REDUCED.
Slow Approach
The Lodestar VS slow approach function will automatically slow
down to 1/3 of normal 60 Hz speed when the hook approaches one
of the hook travel limits. This offers operators a warning that they are
approaching the final hoist limit. This feature is enabled by default
from the factory. This feature can be enabled or disabled by setting
C03-22 to 1 or 0, respectively.
Testing
Before using, all altered, repaired or used hoists that have not
been operated for the previous 12 months shall be tested by the
user for proper operation. First, test the unit without a load and
then with a light load of 50 pounds (22.7 kg) times the number
of load supporting parts of load chain to be sure that the hoist
operates properly and that the brake holds the load when the
control is released. Next, test with a load of *125% of rated
capacity. In addition, hoists in which load-sustaining parts have
been replaced should be tested with *125% of rated capacity by
or under the direction of an appointed person and written report
prepared for record purposes. After this test, check that the
load limiter functions.
*If load limiter prevents lifting of a load of 125% of rated ca-
pacity, reduce load to rated capacity and continue test.
NOTE: For additional information on inspection and testing,
refer to Code B30.16 “Overhead Hoists” obtainable from ASME
Order Department, 22 Law Drive, Box 2300, Fairfield, NJ 07007-
2300, U.S.A.
Table 10. Limit Switches
Models
A (minimum distance between top of hook
and bottom of hoist)
B (minimum distance between top of loose
end chain stop and bottom of hoist)
C (increment between available limit set
positions)
in
mm
in
mm
in
mm
A, C, J
3
76.2
3
76.2
2
50.8
AA
6
152.4
6
152.4
3.75
95.3
B, F, L
1.5
38.1
1.5
38.1
1
25.4
E, H, R
1.5
38.1
1.5
38.1
0.5
12.7
RT
1
25.4
1
25.4
.33
8.4
