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W301-0411E
Chapter B Chapter B
User Mode
B-6 Do Output Control
6.1 Cause for AML Automatic Stop Output
The AML automatic stop output is an output to drive the solenoid of unload valve for main pumps circuit.
ON is output during crane operation, and OFF is output while the operation is being stopped. Once the
operation is stopped, in order to prevent the repetition of detection signal (stop <=> operation), the unload
status is maintained for 2 seconds even after the stop condition is resolved.
However, during this period of 2 seconds, when an operation is performed only to return to the safe side,
the on-load output is performed immediately to allow the return operation to be performed.
In the stop status, a warning is given using the AML built-in buzzer. At the same time, an warning code is
displayed on the graphic display.
The causes for stop are as follows:
Stop item Warning code
1 100% lifting performance stop
W0023 or
W0124 (In the case of main winch used for jib)
2 Anti-twoblock stop W0024
3 Backward stability stop W0025
4 Boom upper limit stop (When area limit is set) W0026
5 Boom lower limit stop (When area limit is set) W0027
6 Lifting height limit stop W0028
7 Load radius limit stop W0029
8 Elevation lower limit (At cylinder stroke end) W0054
9 Elevation upper limit (At cylinder stroke end) W0055
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