Dynamic configuration
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4-7
4.3.2
Options for specifying the active configuration
In the following example, the 8-channel digital terminals are not part of the station, i.e., these
devices are part of the maximum configuration, but are to be deactivated at this station.
There are two options for startup:
1
Deactivating terminals in the hardware configuration by default
–
This option can be implemented easily. After setting the "Module activation"
parameter to "inactive", the configuration can be downloaded to the control system
as usual, see "Activating/deactivating a terminal" on page 4-2.
2
Via DP/V1 or DP/V0 with maximum configuration and final specification in the
application
–
Specify the maximum configuration in the hardware configuration and download it.
–
Switch to cyclic data exchange.
–
On the I/O terminals, no data is exchanged as long as the connected configuration
does not correspond to the available, activated terminals.
–
Specify the configuration connected to the station in a non-volatile memory via
index 6 or index 7.
–
Data exchange is started.
For the second option, the example from the figure on page 4-6 is used and the DI8 as well
as the DO8 are deactivated via DP/V0 and DP/V1. In each case, the data to be written is
indicated. For additional information about the protocol, please refer to Section "Acyclic
communication in DP/V1 mode" on page 3-4 and Section "Acyclic communication in DP/V0
mode via process data" on page 3-13. Here, you will find further examples for
communication via DP/V0 and DP/V1. The individual indices are explained in Section "Slot
Which option will be used in the end depends on the support of DP/V1 in the master. If
DP/V1 is not (or inadequately) supported by the master, DP/V0 should be used. For
SIMATIC
®
STEP 7
®
CPUs, functions are available that have been prepared by
Phoenix Contact.
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