5.11 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: Multi-Function Analog Output Terminal FM, AM Monitor Selection on
page 239 for details on assigning functions to an analog output.
◆ U1: Operation Status Monitors
Status monitors display drive status data such as output frequency and output current. Refer to U1: Operation Status
Monitors on page 447 for a complete list of U1- monitors and descriptions.
◆ U2: Fault Trace
These monitor parameters are used 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 449 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 289 for
instructions on how to reset these monitor values.
◆ 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 450 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 289 for
instructions on how to reset these monitor values.
◆ U4: Maintenance Monitors
Maintenance monitors show:
• Runtime data of the drive and cooling fans, and number of Run commands issued
• Maintenance data and replacement information for various drive components
•kWh data
• Highest peak current that has occurred and output frequency at the time the peak current occurred
• Motor overload status information
• Detailed information about the present Run command and frequency reference source selection
Refer to U4: Maintenance Monitors on page 450 for a complete list of U4- monitors and descriptions.
◆ U5: PID Monitors
These monitors display various aspects of PID control. Refer to PID Block Diagram on page 154 for details on how
these monitors display PID data.
U5: PID Monitors on page 451 has a complete list of U5- monitors and descriptions.
◆ U6: Operation Status 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 PG motor encoder
• Pulse data for Zero Servo control
• ASR and Feed Forward control monitors
Refer to Figure 5.35 on page 171 and Figure 5.36 on page 172 for details and an illustration showing where monitors
are located in the ASR block.
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