T025052E
Boom Angle Limit
How to Use the Working Range Limit Function
Raise or lower the boom to the desired angle, and press the boom upper or lower limit restriction key. The corresponding limit restriction indicator lamp flashes and the buzzer sounds continuously, indicating that the limit boom angle has been stored in the memory. When the boom is moved back to an angle within the set limit, the limit restriction indicator lamp stops flashing and stays illuminated and the buzzer stops. Thereafter, the upper or lower boom angle limit restriction indicator lamp flashes and the buzzer sounds continuously whenever the upper or lower limit previously registered is reached. To cancel the boom angle limit function, press the boom angle limit restriction key again. The corresponding boom angle limit restriction indicator lamp goes off.
[NOTICE] ◆ If the selected working range limits allow the crane to approach too close to an obstruction, the crane may be contacted or hit, depending on the operational status and the manner in which the load is handled. When selecting limits, allow sufficient clearance. ◆ If working range limit function is active, the machine does not stop automatically. Take care. The working range limit function allows the operator to restrict the boom angles (upper and lower), boom height and load radius, beyond the point where buzzer sounds and the movement of the boom should be automatically stopped. The function is useful for handling a load in a confined place because it defines the area in which the boom can operate. ◆Turning the power off (PTO switch: OFF) automatically erases all the previous settings stored in memory after approximately 2 hours. To resume the operation more than 2 hours after the power has been last turned off, enter the settings all over again.
Upper boom angle limit restriction indicator lamp Lower boom angle limit restriction indicator lamp
Lower boom angle limit restriction key Upper boom angle limit restriction key T50101E
Upper boom angle restricted Lower boom angle restricted
Lifting height restricted
Load radius restricted
θu H θL
R T20912E
Load Moment Indicator (AML-L)
76
Load Moment Indicator (AML-L)
