5 Setting parameters
76 Festo – GDCP-CMMP-M3/-M0-C-CO-EN – 1510b – English
The following diagram illustrates the connections between the individual parameter sets.
CANopen
object
1011
Switching
on of the
controller
CANopen
object
1010
Default parameter set
Application
parameter set
Current parameter set
Fig. 5.1 Connections between parameter sets
Two different concepts are conceivable for administering parameter sets:
1. The parameter set is created with the parametrisation software and transmitted completely into the
individual controllers. With this procedure, only the objects accessible via CANopen have to be put
in via the CAN bus. A disadvantage here is that the parameterisation software is needed for each
start-up of a new machine or in case of a repair (controller exchange).
2. This variant is based on the fact that most application-specific parameter sets deviate from the
default parameter set in only a few parameters. This makes it possible for the current parameter set
to be newly constructed via the CAN bus each time the system is switched on. To do this, the higher
level controller first loads the default parameter set (call-up of the CANopen object 1011
h
_01
h
(restore_all_default_parameters). After that, only the differing objects are transmitted. The entire
procedure lasts less than 1 second per controller. An advantage is that this procedure also works for
unparametrised controllers, so that the commissioning of new systems or replacement of individual
controllers is unproblematic, and parametrisation software is not required for this.
Warning
Before the output stage is switched on for the first time, make sure the controller really
includes the parameters you want.
An incorrectly parametrised controller can turn out of control and cause personal injury
or property damage.
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