Rockwell Automation Flex/WebPak 3000 DC Drive ControlNet, Network Communication Board, 915FK2101 - Manual (Page 25)

Programming the Drive 4-3
4.2.2 Programming Scheduled Drive Reference Data
Setting CONTROL SOURCE SELECT to NETWORK allows the scheduled data from the PLC
to control the drive. If CONTROL SOURCE SELECT
≠
NETWORK , then scheduled drive
reference data from the ControlNet network is not used.
The scheduled drive reference data can be configured as one to eight words of data.
The first word of the scheduled drive reference data is always the drive control word; it
is written in element 0 of the Output file. Should you configure less than eight words of
output data, you can access the Scheduled Drive Reference Data through file N12
(see section 4.3) as unscheduled data messages.
You must create a drive control application program to run in the programmable
controller. This application program must write from one to eight words of data to the
file you defined during drive configuration as the Output Address. The value you
defined as the Output Size determines how many words of data the option board can
accept from the programmable controller. During a scheduled data transfer, the
programmable controller writes the data contained in the Output Address to the option
board.
Reference and control information is scanned by the drive at different rates depending
on the type of data and the drive operating mode (speed regulator or voltage
regulator). If the drive is configured as a speed regulator, all of the reference inputs
are evaluated every 5 ms for FlexPak 3000 drives, every 10 ms for WebPak 3000
drives. If the drive is configured as a voltage regulator, all of the reference inputs are
scanned every 10 ms. The drive control bits are always evaluated every 20 ms.
Table 4.4 describes the function of each word of the FlexPak 3000 scheduled drive
reference data. Table 4.5 describes the function of each word of the WebPak 3000
scheduled drive reference data.
Table 4.3 – Data Sent/Received 8 Words (Maximum)
PLC to Drive FlexPak WebPak
Word 0 Control Control
Word 1 Reference Reference
Word 2 Reference Network 1
Word 3 Network 1 Network 2
Word 4 Network 2 Network 3
Word 5 Network 3 Field Reference
Word 6 Speed FB. Gain Not Used
Word 7 Speed Loop PI Not Used