YASKAWA CR700, Technical Manual, Page: 185 / 886

Startup
Procedure
and
Test
Run
3
3.7 Test Run Procedure
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 185
3.7 Test Run Procedure
This section describes the procedure for performing a test run. Note that only the most basic settings are
introduced here.
1. Make sure the following information is in hand before attempting to perform a test run.
• Motor test report
• Data that makes it possible to check the control method and how the overall operation is working (sequence
diagrams, etc.)
2. Check to make sure that the output current does not exceed 150% of the drive rated current at start, as well as
when closing and releasing the brake at stop. Yaskawa recommends the following to keep the motor current
within 150% of the drive rated current when running a crane application.
Drive rated current × Coefficient (0.6 - 0.9) > Motor rated current
Control Method Target Value for the Coefficient
CLV Control 0.9
OLV Control 0.8
V/f Control 0.7
Using V/f Control with Multiple Motors 0.6
3. Make sure that the output current does not exceed the motor rated current while operating at constant speed.
Take the following corrective action if the output current exceeds the motor rated current.
• Decouple the motor and machinery and perform Auto-Tuning with just the motor connected.
Note:
If Auto-Tuning has already been performed, then it does not need to be done again.
•
Make sure that the holding brake is released before performing Rotational Auto-Tuning. Rotational Auto-
Tuning can not be performed correctly if the brake is not released. Failure to comply can result in erroneous
operation of the drive, which may lead to injury.
•
Adjust drive parameters.
•
Change the value set in S2-03 [Run Cmd Delay Timer (REV/FWD)] if there is too much current when
starting to hoist the load after it is lowered while operating in V/f Control or OLV control.
Note:
Refer to
Run Command Delay Timer (REV/FWD) on page 205
for more information about the setting a delay for the Run command.
4. To use the application selection function, refer to the section where A1-06 is explained.
5. Refer to Problems that Can Frequently Occur during Setup and Possible Solutions on page 226 if other
problems arise during the test run, and take the recommended corrective action.
6. Do not use
L3-xx [Stall Prevention]
with crane and hoist applications, because this Stall Prevention can lead
to accidents in such applications.