Rockwell Automation Flex/WebPak 3000 DC Drive ControlNet, Network Communication Board, 915FK2101 - Manual (Page 32)

4-10 ControlNet Network Communication Option Board For Use With FlexPak 3000 and WebPak 3000 DC Drives
All the parameters may accessed with one message block. Any contiguous subset of
the parameters may be changed without sending a new copy of the entire block.
Some of the parameters are marked Config (configuration), meaning that they may
only be changed while the drive is stopped. Any attempt to change the value of these
parameters while the drive is in a “running” state will result in an error, and the value in
the drive will not be changed. For this reason, the configuration parameters are all
grouped together after the tunable parameters. (
CONTROL SOURCE SELECT (P.000) is
located at the start of the Config section, N10:150.) Tunable and configuration
parameters are also grouped according to potential frequency of use, from most-used
to least-used.
Refer to table 5.1 for a listing of the file N10 parameters for FlexPak 3000 drives.
Refer to table 6.1 for a listing of the file N10 parameters for WebPak 3000 drives.
4.3.4 Using the Drive Display Data (N11:x)
The drive display data can be accessed beginning at N11:0. Attempting to write to any
of these parameters will cause an error. The drive updates these parameters every
100 ms. Selected speed feedback parameters are updated at the speed loop scan
period (FlexPak 3000 drives: 5 ms for a speed regulator, 10 ms for a voltage
regulator; WebPak 3000 drives: 10 ms for a speed regulator, 10 ms for a voltage
regulator).
Refer to table 5.2 for a listing of the file N11 parameters for FlexPak 3000 drives.
Refer to table 6.2 for a listing of the file N11 parameters for WebPak 3000 drives.
4.3.5 Using the Drive Reference and Feedback Data (N12:x)
When scheduled traffic is reduced to transmit only a subset of the drive reference and
feedback data, the information that is not transmitted as scheduled data can be
accessed in file N12 as unscheduled data. The drive updates this data at the speed
loop scan period (FlexPak 3000 drives: 5 ms for a speed regulator, 10 ms for a
voltage regulator; WebPak 3000 drives: 10 ms for a speed regulator, 10 ms for a
voltage regulator). A message block can be used to read any or all of the data. The
Drive Control word and all of the Drive Feedback data are read only when accessed
through file N12. All other words accessible through file N12 are read/write.
Refer to table 5.3 for a listing of the file N12 parameters for FlexPak 3000 drives.
Refer to table 6.3 for a listing of the file N12 parameters for WebPak 3000 drives.
4.3.6 Using the Write Status (File N20:x) to Troubleshoot a Drive
Parameter
You can troubleshoot errors that may occur when you write values to parameters to
the drive. When a write command is sent from the PLC to the drive, it is possible that
the value may not be accepted because:
• The parameter is read-only
• The parameter is a configuration parameter and the drive is in run or jog
• The value is out of range (less than the minimum or greater than the maximum)