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2.4.5 MOMENT LIMITER FUNCTIONS
[1] OVERLOAD WARNING
1. SAFETY ZONE (“Actual load” is less than 90 % of the
“rated total load”)
• Green of the working status lamp lights up.
• The LEDs lights up in green if the load factor is less than
80 %.
2. PRE-WARNING (“Actual load” is 90 to less than 100 % of
the “rated total load”)
• Yellow of the working status lamp lights up.
• The LEDs lights up in orange and green if the load factor
are 90 to less than 100 %.
• The alarm bleeps intermittently.
3. LIMIT WARNING (“Actual load” is 100 % or higher than the “rated total load”)
• Red of the working status lamp lights up.
• The alarm bleeps continuously.
• The hazardous operation of the boom stops automatically.
• “Load factor 110 % or more” LED (orange) lights up.
• “Load factor 110 % or more” LED (red) lights up when the load factor is 110% or more.
4. CLEARING LIMIT WARNING AUTO STOP
If the system stops automatically, promptly perform the recovery operation caused by overloading.
See “Operation 2.4.3 [2] Recovery Operation After Auto Stop” for recovery operations.
[2] WORKING ENVELOPE RESTRICTION WARNING
When the working envelope gets close to the set restriction value, a warning is issued to notify the
operator and people around of the situation.
The last status of the set value for the working envelope restriction is memorized even if the starter switch
is turned to the OFF position.
• See “Operation 2.4.4 [1] Descriptions of Switches on Moment Limiter Display Unit” for how to set the
value for working envelope restriction.
• The warning buzzer sounds only when the working envelope gets close to the set restriction value.
When the working envelope has been set, the restriction will be as follows.
1. SAFETY ZONE
• The appropriate working envelope restriction LED (green)
lights up.
• Green of the working status lamp lights up.
2. PRE-WARNING
• The appropriate working envelope restriction LED (green)
lights up.
• The alarm bleeps intermittently.
• Green of the working status lamp lights up.
3. LIMIT WARNING
• The appropriate working envelope restriction LED (green)
lights up.
• Yellow of the working status lamp lights up.
• The alarm bleeps continuously.
• The hazardous operation of the boom stops automatically.
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