User Mode

6 2.5 Drum Indicator Do output control

The Do output control corresponding to main drum rotation speed and the Do output control corresponding to auxiliary drum rotation speed are performed concurrently. ON is output for 20 ms, and then OFF is output.

6 2.6 Drum Indicator Do output restriction

The drum output exceeding the frequency of 7 Hz is stopped, and the output stop status will be maintained until the frequency becomes to 5 Hz or less.

6.3 Output of warning

The aim of this output is to give information to operators via external warning lamps and buzzer.

6.3.1 Safety signal

This output controls the external warning lamps. Condition of output: (1), (2) and (3) exist.

(1)The moment load ratio is less than 90%. (When boom lift is performed with the jib mounted on the boom, the ratio is below the value specified.)

(2)100% stop cancel input is "no cancel display".

(3)Anti-two-block stop cancel input is "no-cancel display".

When the condition is fulfilled, "OFF" is output.

6.3.2 90% warning

This output controls the external warning lamps. Condition of output: (1), (2) and (3) exist.

(1)The moment load ratio is 90% or over and less than 100%. (When boom lift is performed with the jib mounted on the boom, the ratio is in the range specified.)

(2)100% stop cancel input is "no-cancel display".

(3) Anti-two-block stop cancel input is "no-cancel display".

When the condition is fulfilled, "OFF" is output.

6.3.3 100% warning

This output controls the external warning lamps. Condition of output: (1), (2) or (3) exists.

(1) The moment load ratio is over 100%. (When boom lift is performed with the jib mounted on the boom, the ratio is over the value specified.)

(2) 100% stop cancel input is "cancel display".

(3) Anti-two-block stop cancel input is "cancel display".

When the condition is fulfilled, "OFF" is output.

B-7 AML Control

7.1 Backward stability stop function

7.1.1 Outline of function

The backward stability stop function prevents the overturning of crane to the direction opposite to the boom side (backward) by the weight of counterweight (C/W) and other components. Unlike the overload stop and anti-two-block stop, the stop cannot be canceled with this function.

7.1.2 Restriction contents

When the boom elevation angle goes over the backward stability performance, a error code "W0012" is displayed regardless of the operation. Also, the crane stop output is performed while the crane is operated toward the critical side exceeding the stability performance.

The critical side operations are as follows:

(1) Boom retraction

(2) Elevation raising

During the stop output, the code "W0025" is displayed. Even after the stop output condition is canceled, the stop output is maintained for 2 seconds.

7.2 Work range limit stop function

7.2.1 Outline of function

The work range limit stop function specifies the work range where the crane entry by operator is prohibited, and performs the crane stop output when the crane is operated to enter the specified area. The area is specified by the copying method (the crane is actually operated to before the entry prohibition area, and then the range limit position is set at the position). The following 6 work range limit stops are performed.

(1) Boom height

(2) Boom upper limit angle

(3) Boom lower limit angle

(4) Load radius

(5) Right slewing limit (Note)

(6) Left slewing limit (Note)

Note: The slewing hydraulic circuit adopts a route different from that of other operations, and no stop is performed with the main pumps relief valves unload. Consequently, the stop is performed by the output of solenoid proportional valve that is connected to the pilot pressure line for slewing operation. Therefore, the slewing range limit works only the models equipped with the solenoid proportional valve for slewing operation.