Yaskawa VCD 723 - Manual (Page 42)

3 Operation
36 Monitor Functions
9/15/93
Functions numbered 600 through 799 are reserved for parameters that may be
viewed, but not modified. The function numbers for these displayable
parameters depend on the PAC program, although some function numbers may
be standardized. Examples of displayable parameters are Speed Feedback,
Actual Motor RPM, and Inverter Output Current.
The following steps explain how to display a given parameter via the LCDU
display:
❏ Press the Up or Down Arrow keys to select the desired function number.
The display shows a description of the function on the top line, and the
present value, units, and function number on the bottom line.
Monitor
Functions
SPEED
0.000 PU M600
The drive has two methods for reporting errors and faults. Each condition may
utilize one, both, or neither of the reporting methods.
1. The most conventional method is called fault reporting. Each occurrence of a
fault is recorded in an area of memory called the Fault List. At the moment a
fault condition occurs, the red FAULT light will light and a unique fault
number will appear on the LCDU. The Fault List stores the 16 oldest faults
and stops recording faults as soon as the list is filled. This list is erased when
the drive is powered down or reset. Whether or not the drive stops or
continues to run is dependent on the way the particular fault is implemented
within the PAC diagram. Most standard faults are set so that the drive will
stop if a fault occurs.
2. The second method is called error reporting. Each occurrence of an error is
recorded in an area of memory called the Error List. Error reporting differs
from fault reporting in several respects. First, at the moment an error
condition occurs, the red FAULT light will NOT light and a unique error
number will NOT appear on the LCDU. Second, the Error List stores the 16
most recent errors and always overwrites the oldest error when the list is
filled. Third, the Error List is stored in Non-Volatile Memory and is retained
when the drive is powered down or reset. Lastly, the drive operation is NOT
affected when an error condition occurs.
Error Handling/
Reporting