5.11 U: Monitor Parameters
YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual 253
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 205 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 391 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 393 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 251 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 394 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 251 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 394 for a complete list of U4- monitors and descriptions.
◆ U5: PI Monitors
These monitors display various aspects of PI control. Refer to PI Block Diagram on page 147 for details on how these
monitors display PI data.
U5: PI Monitors on page 396 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
• The offset value added to the frequency reference by the frequency offset function. Refer to Setting 44, 45, 46: Offset
Frequency 1, 2, 3 on page 188.
Refer to U6: Operation Status Monitors on page 397 for a complete list of U6- monitors and descriptions.
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