0 operation – Harrington Hoists and Cranes NER2 Smart Limits Supplement User Manual
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4.0 Operation
4.4
Setting and Canceling the Smart Limit
4.4.1
Register the length of load chain before setting or canceling the Smart Limit.
4.4.2
Smart limit is adjustable from the pendant for both upper and lower limits. The setting/canceling
procedure for the Smart Limit is as follow:
• Stop hook at the desired limit position.
• Press the Emergency Stop Button.
• To set the limit:
o
For upper limit, depress the UP button to low speed for 5+ seconds.
o
For lower limit, depress the DOWN button to low speed for 5+ seconds.
• To cancel the limit:
o
For upper limit, depress the UP button to high speed for 5+ seconds.
o
For lower limit, depress the DOWN button to high speed for 5+ seconds.
• Turn the Emergency Stop Button clockwise to allow hoist operation.
4.5
Calibration of the Smart Limit
4.5.1
To avoid a potentially harzardous situation, peform a calibration of Smart Limit after
a loss of power.
4.5.2
Do not put a load on the hoist when calibrating Smart Limit.
4.5.3
In case of a power loss, the set positions of Smart Limit may change. The hoist will only operate in low
speed until it is calibrated. The calibration procedure is as follow:
• Press the Emergency Stop Button.
• Depress the UP button to the high speed for 5+ seconds.
• Turn the Emergency Stop Button clockwise to allow hoist operation.
• Operate the hoist in the UP direction until the upper limit is actuated.
• With the upper limit switch actuated, press the Emergency Stop Button.
• Depress the UP button to the low speed for 5+ seconds.
• Turn the Emergency Stop Button clockwise to allow hoist operation.
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