In order to change an already existing driver
select the driver in the detail view. In the context menu select
Change driver and the same
dialog as when loading a driver opens.
So the driver definition for a number of maybe
already existing variables can be changed. The acceptance of a new
driver occurs by clicking of the same in the list box and
confirming the selection with
OK. The necessary settings for the
driver(s) (interface assignment, interrupt address, etc.) are
defined during the configuring of the variables. The change of the
driver definition is only possible for the released drivers which
have been declared as being compatible. With the exchange of the
driver definition a universal driver concept is made available,
because the variables are still available and functional after the
change of a driver, if they exist in the changed driver.
The driver can also be changed by entering the corresponding driver name of an already existing driver.
During the planning phase of a project the address concept for zenon is generally not ready. Only the process variables to be used have been defined.
In order to allow a parallel processing of the project, the simulator driver is included as driver. The generation of the pictures with dynamic linkages and the on-line test (setpoint input, etc.) can be carried out.
Once the final address concept with the linkage to zenon is available, the driver is changed and can be tested and used under project conditions.
The change of a driver is only possible under the prerequisite that the driver used during the configuring and finally used in the end has the same properties (variable types). In order tu guarantee for this anticipatory projecting is necessary.