Yaskawa DSD 406 - Manual (Page 49)

3 Operation
45 3/21/96
Error Handling/Reporting
Error Handling/
Reporting
The drive has two methods available to report errors. Each error condition may
utilize ONE OR BOTH OR NEITHER of the reporting methods.
The most conventional method is called ‘fault recording’. If this method is
enabled for a particular error, the red FAULT LED and a unique fault code
number will appear on the SCDU at the moment the error occurs. Each
occurrence of a fault is recorded in an area in “RAM” called the Fault List. The
Fault List stores the first 16 faults to occur after the drive is powered up,
meaning it will contain the 16 “oldest” faults. Recording of faults stops as soon
as the 16th fault occurs. This list is erased when the drive is powered down or
reset. Whether 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 up so that the drive will stop if a fault occurs.
The second method for error handling is called ‘error recording’. Error
recording differs from fault recording in three respects:
❶
The error condition will not be shown on the SCDU or the red FAULT LED.
❷
The error list stores the last errors to occur, meaning it will contain the 16
most recent errors. Each new error over-writes the oldest error in the list.
❸
This list is maintained in battery-backed-up “RAM” and is retained when the
drive is powered down or reset.
Again, the action taken by the drive when an error occurs depends on how the
particular error is implemented within the PAC Diagram.
Function # 801 is used to display or alter the Error Disposition List. This list can
be consulted at any time to determine whether a particular condition should be
reported as an error, a fault, or both. The process for changing the entry in the
disposition list for a particular condition using the SCDU is as follows:
❏ Use the
⇑
and
⇓
keys to select function # 801 from the function level. The
data indicator is off during this step.
OFF
DATA
801