Helmholz 700-651-CAN01, Manual

Page: 13 / 29

4 Configuration (CAN Layer 2)
In Layer 2 mode the DP/CAN coupler can transmit and receive
any CAN messages (CAN 2.0A/B, 11-bit and 29-bit).
A distinction is made between two different transmission
methods. In the first method, the identifier and size of the CAN
message is permanently parameterized in the transmit and receive
objects and only the data are transmitted via the PROFIBUS. Each
transmit and receive object therefore corresponds to one CAN
frame.
In the second method the Receive Object can receive several
messages filtered by a parameterizable acceptance mask. In this
method not only the data but also the identifier and the length of
the CAN frame is transmitted via the PROFIBUS to the PLC
application.
Any number of CAN messages can be sent with this type of
Transmit Object. Moreover, this type of Transmit Object can also
transmit the message cyclically at a fixed time.
4.1 Installing and parameterizing the device
Before you can use the DP/CAN coupler with Layer 2 in the
Hardware Configurator you must install the supplied GSD files
“DP2C_L2h.GSD” for 11 bits and “DP29_L2B.GSD” for 29 bits.
You can do this in the Hardware Configurator under menu item
“Options / Install GSD Files.”
Having done that you will find the DP/CAN coupler in the
hardware catalog under ‘Additional FIELD DEVICES / IO /
Helmholz.’
You can now drag and drop “DP/CAN coupler L2 V2h” or
“DP/CAN coupler L2 V2 29B” onto a PROFIBUS network you have
already set up.
DP/CAN Coupler 13