Rockwell Automation 7000A PowerFlex Medium Voltage Drive (A-Frame) - Classic Control - Manual (Page 414)

6-110 Component Definition and Maintenance
7000A-UM150F-EN-P –June 2013 7000 “A” Frame
The diagnostic trending is a valuable tool for troubleshooting faults in the
drive. It is a method of capturing the variation in the values of different
variables over a period of time prior to and after a fault or warning
condition. In a classic drive, the maximum number of parameters that can
be assigned for trending is 8. The length of the trend buffer is 100 samples.
Diagnostic Setup
The diagnostic setup is used to define the source of the diagnostic trigger.
Information that has to be programmed in the diagnostic setup is listed
below:
Trace The Read-Only Parameter which is assigned to a particular
list. The item linked to Trace 1 is used as the trigger value.
There are 8 traces in total, although not all have to be active.
Rate
The time delay between sample periods. Any value between 0
and 20,000 msec can be set. Use numeric keypad to enter the
value and press the enter key to accept.
Post
The percentage of the list which will occur after the after the
trigger point. Any value between 0 and 100% may be used.
Trigger
Defines whether you want a continuous or a single-shot
trigger. Pressing this key will place an S or a C in front of the
trigger parameter. You will almost always want a Single-Shot
(S) trigger.
S = Single shot >> the trigger occurs only once and stops. The
trigger must be manually re-armed. The Re-Arm function
clears the memory buffer, which contains the data stored from
the previous trend. It is necessary to reset the trending feature
in order for a second trigger to occur, unless you have
continuous trigger enabled.
C = Continuous capture >> auto re-arm is enabled to collect
new trends until stopped by viewing contents of captured
data.
Cond Defines the condition that will cause the trigger. The possible
options are:
= Equal to + Boolean OR
N= Not Equal to N+ Boolean NOR
> Greater than & Boolean AND
< Less than N& Boolean NAND
Data Defines the trigger value with respect to the read-only
parameter in Trace 1.
Setting up Diagnostic
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