YASKAWA L1000A - U: Monitor Parameters; U1: Operation Status Monitors

5.12 U: Monitor Parameters
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual 275
Parameter Details
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5.12 U: Monitor Parameters
Monitor parameters let the user view various aspects of drive performance using the digital operator display. Some
monitors can be output from terminals FM and AM by assigning the specific monitor parameter number (U-) to
H4-01 and H4-04. Refer to H4-01, H4-04: Terminal FM, AM Monitor Selection on page 220 for details on assigning
functions to an analog output.
◆ U1: Operation Status Monitors
Status monitors display drive status data such as output speed and output current. Refer to U1: Operation Status Monitors
on page 430 for a complete list of U1- monitors and descriptions.
◆ U2: Fault Trace
Use these monitor parameters to view the status of various drive aspects when a fault occurs.
This information is helpful for finding out why a fault occurred. Refer to U2: Fault Trace on page 432 for a complete list
of U2- monitors and descriptions.
U2- monitors are not reset when the drive is initialized. Refer to o4-11: U2, U3 Initialization on page 256 for
instructions on how to reset these monitor values.
Note: Fault trace (i.e., the fault history) is not kept when CPF00, CPF01, CPF06, CPF24, oFA00, oFb00, oFC00, Uv1, Uv2, and Uv3
occur.
◆ U3: Fault History
These parameters display faults that have occurred during operation as well as the drive operation time when those faults
occurred. Refer to U3: Fault History on page 433 for a complete list of U3- monitors and descriptions.
U3- monitors are not reset when the drive is initialized. Refer to o4-11: U2, U3 Initialization on page 256 for
instructions on how to reset these monitor values.
Note: Fault trace (i.e., the fault history) is not kept when CPF00, CPF01, CPF06, CPF24, oFA00, oFb00, oFC00, Uv1, Uv2, and Uv3
occur.
◆ U4: Maintenance Monitors
Maintenance monitors show:
• Runtime data of the drive and cooling fans and number of Up/Down commands issued
• Maintenance data and replacement information for various drive components
•kWh data
• Highest peak current that has occurred and output speed at the time the peak current occurred
• Motor overload status information
• Detailed information about the present Up/Down command and speed reference source selection
Refer to U4: Maintenance Monitors on page 434 for a complete list of U4- monitors and descriptions.
◆ U6: Control Monitors
Control monitors show:
• Reference data for the output voltage and vector control
• Data on PM motor rotor synchronization, forward phase compensation, and flux positioning
• Pulse data from the motor encoder
• Pulse data for Position Lock control
• Speed Loop and Inertia Compensation control monitors
Refer to Figure 5.10 on page 179 for details and an illustration showing where monitors are located in the speed control
loop block.
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