Yaskawa Matrix Converter - Manual (Page 96)

Test Run Procedures
4-
13
„ Operation using the Digital Operator
• Use the digital operator to start operation in Local Mode in the same way as in no-load operation.
• If a fault occurs during run, make sure the STOP key on the digital operator is easily accessible.
• At first, set the frequency reference to a low speed of one tenth the normal operating speed.
„ Checking Operating Status
• Having checked that the operating direction is correct and that the machine is operating smoothly at slow
speed, increase the frequency reference.
• After changing the frequency reference or the rotation direction, check that there is no oscillation or abnor-
mal sound from the motor. Check the monitor display to ensure that U1-03 (Output Current) is not too
high.
• Refer to Notes on Tuning the MxC on page 4-14 if hunting, oscillation, or other problems originating in the
control system occur.
‹ Saving Parameters
Use the Verify Mode (“VERIFY” will be displayed on the LCD screen) to check parameters that have been
changed for Test Run. Those values are then saved as parameters.
Any parameters that have been change by Auto-Tuning will also be displayed in Verify Mode.
If required, the copy function in parameters o3-01 and o3-02 displayed in Advanced Programming Mode can
be used to copy the settings that were changed in the MxC to the memory in the digital operator. If setting
changes are saved to the digital operator, they can be easily copied back to the MxC to speed up system recov-
ery if for any reason the MxC has to be replaced.
The following functions can also be used to manage parameters.
• Saving parameters
• Setting access levels for parameters
• Setting a password
„ Initializing the MxC with Parameters (o2-03)
If o2-03 is set to 1 after completing a Test Run, parameters will be saved in the MxC. Later, after MxC settings
have been changed further, the MxC can be reset back the parameters values that were saved earlier. All
parameters are saved to a separate area of the memory that can be accessed by performing a “user initializa-
tion” (A1-03 = 1110).
„ Parameter Access Levels (A1-01)
A1-01 can be set to 0 (monitoring-only) to prevent parameters from being changed. A1-01 can also be set to 1
(User-Specified Parameters) and used along with A2 parameters to display only parameters required by the
machine or application in a Programming Mode.
„ Password (A1-04 and A1-05)
When the access level is set to monitoring-only (A1-01 = 0), a password can be set so that parameters will be
displayed only when the correct password is input.