Helmholz 700-651-CAN01, Manual

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The 5 bytes of the HANDSHK_OUT area are used to transmit the
transmit objects and the Transmit Object. The bits always initiate
transmission of the message when the bit is inverted (toggle bit).
Byte Bit Function
0 0 Send frame for Transmit Object
1 Send frame for transmit object 1
2
Send frame for transmit object 2
3 Send frame for transmit object 3
4 Send frame for transmit object 4
5 Send frame for transmit object 5
6
Send frame for transmit object 6
7 Send frame for transmit object 7
… …
4 0 Send frame for transmit object 32
1
Send frame for transmit object 33
2 Send frame for transmit object 34
3 Send frame for transmit object 35
4 Send frame for transmit object 36
5
Send frame for transmit object 37
6 Send frame for transmit object 38
7 Send frame for transmit object 39
5.3 Transmit and receive objects
Depending on the parameterized size of the object, the receive
objects (“DI x bytes”) always contain the data of the last CAN
frame to be received with the corresponding CAN identifier.
Receipt of a new frame can be detected by the 5 bytes of the
HANDSHK_IN area.
i
All receive and transmit
objects are defined as
consistent data areas in
the PROFIBUS.
The transmit objects (“DO x bytes”) can be assigned the values for
the parameterized CAN frame. If the values of the transmit object
change, the frame is transmitted automatically.
If you want to transmit the frame without changing the data, that
can be triggered via the 5 bytes of the HANDSHK_OUT area.
The sequence of receive
and transmit objects is
defined!
The sequence of the objects is defined: All receive objects “DI”
must be defined first; then, all transmit objects “DO.”
DP/CAN Coupler 21