Specifications

YASKAWA Inverter Drive A1000 – Crane Software Application Manual

6. Test Run

After completing the Startup Procedures, Auto-Tuning, and Test Run operations described in section 4 of the standard

A1000 AC frequency inverter Technical Manual (SIEP C710616 27), check the following points related to the custom

A1000 Crane Drive.

• The wiring should be connected so that the motor is rotating in the forward (FWD) direction when hoisting the

load and in the reverse (REV) direction when lowering the load.

• When using the crane to hoist or lower the load without a counter-weight and the drive is operating in Open

Loop Vector (OLV) control mode, set parameter S1-20 to “1” (Enables Regen Operation in REV)

• Output Current at Maximum Load

- The drive output current at start as well as when opening and closing the brake should not exceed

150% of the drive rated current.

- The output current when operating at constant speed should not exceed the motor rated current.

If the output current exceeds the levels described above, the following countermeasures can be implemented:

- Perform Rotational Auto-Tuning (if this has already been successfully performed, then there is no need

to repeat the process). Make sure that the motor is decoupled from the load when Auto-Tuning is

performed.

- Adjust parameter settings according to the guidelines in section 7 (Description of Added Functions) and

Appendix I (Tuning Procedures).

- If there is excessive current when hoisting just after lowering the load while operating in V/f Control or

Open Loop Vector Control, then adjust parameter S2-03 (Run Command Delay Timer). See section 7.2

of this document for a detailed description of this function.

• If other errors occur while performing a test run, refer to section 0 (Troubleshooting) for appropriate

countermeasures.

CAUTION

• Stall Prevention and Overvoltage Suppression functions can be extremely dangerous when used with crane and

hoist applications if not set correctly. To ensure safety, be certain the settings for these functions are appropriate

for each particular installation.

• To ensure safety, Overspeed Detection should also be setup correctly in closed loop control modes.