KUNBUS-COM EtherCAT
30 / 135
The size of the individual areas can be adapted to the respective
application and is saved non-volatile in parameter registers. The
configuration area has a fixed length and provides the necessary
address offsets as well as handshaking data for external access to
the remaining areas.
We recommend using our Evaluation Board and the C source files
provided with this as a template for developing the application side of
a DPR interface. Upon request, we can also provide you with the
documents and source codes of the Evaluation Board separately.
Therefore, in this section we will only describe the basic procedure
when using the DPR interface.
Each mailbox controls and coordinates the data transmission
individually during communication by means of corresponding control
values, length specifications and error codes in the relevant headers
of the data packets. The process data of memory areas also
coordinates the exchange of data between the base board and
COMS module by means of a corresponding data header.
NOTICE
Important instructions on using the DPR
è
You can operate the KUNBUS-COMS module either in DPR mode
or
in
SPI/SSC mode.
ð
You determine the mode by setting the logic level on PIN a14 (+3.3
V = 1 = SPI/SSC mode, GND = 0 = DPR mode). you will find
information about the current interface mode in the CDI menu: "4 -
Module Status > 1 - Common Status"
è
If you use the Scripter [
}
44] in DPR mode, you must bear in mind that
the scripter can only communicate via the CDI.
ð
Changes to parameter registers are then still only possible via the
DPR mailboxes.
Components