Operating instructions

34 08/06
4.11.5 Virtual links
A PDO tele
g
ram contains 0 ...8 data bytes accordin
g
to CANopen. A mappin
g
for an
y
kind of objects can be done in these data bytes.
For the system bus, the PDO telegrams are firmly defined with 8 data bytes. The map-
pin
g
is not done via mappin
g
parameters as with CANopen, but via the method o
f
sources and links.
Each function provides its output data via a source. These sources are defined via
source numbers. The input data of functions are defined via parameters. The link of a
data input to a data output is done via the assignment of parameters to source num-
bers.
Example 1:
Function A
Function C
Function B
Source
Parameter 125
Parameter 187
Source
-
-
No. 27
No. 5
In example 1, the two inputs of function C are connected to the outputs of functions
A
and B. The parameterization for this connection is thus:
Function C
Parameter 125 = Source-No. 27
Parameter 187 = Source-No. 5
Example of a virtual link in VPlus:
Parameter
(Softwarefunction)
e.g. Start-clockwise 068
Source-No.
(Operation mode)
e.g. 71-S2IND
Digital input
The assignment of the operation modes to the software functions available can be
adapted to the application in question.