Deactivating The Cfgdata Check; Multi-Configuration Mode - Beckhoff BK3 0 Series Documentation

7.3

Deactivating the CfgData Check

Checking the CfgData can be deactivated if a DP master is not capable of operating with the modules listed
in the GSD file. In that case the master can send any CfgData, and as many inputs and outputs are
transferred as are described by the CfgData.
Deactivation of the CfgData checking can also be useful if a specific address range is to be reserved in the
PLC for future extensions. In that case, more input and output data is to be transferred than is in fact
necessary.
Deactivation of the CfgData check can be set in the UserPrmData [} 35]:
Byte Bit
1 0
In general, the I/O data from the modules (terminals or IE modules) is written by the coupler in the standard
sequence (first the complex, then the digital modules), as is also the case for other fieldbus couplers; this
has already been described in connection with the structure of the process image in the coupler. The
decision on a module-to-module basis as to whether the module is mapped in compact or complex form,
which would otherwise be possible under DP, is omitted when CfgData checking is deactivated. In that case,
the setting made in the UserPrmData applies to all modules:
The compact or complex mapping can be set in the UserPrmData [} 35]:
Byte Bit
9 2
The extended GSD file must be used to deactivate CfgData checking and to specify compact/complex
mapping textually in the master's configuration tool.
7.4

Multi-Configuration Mode

Applications of the multi-configuration mode
Multi-configuration mode can be used for the following types of application. A more extensive consideration,
considering, in particular, the various implementation levels of the Bus Coupler, is given in the Requirements
of a production machine [} 77].
Creating a DP configuration for various implementation levels of the Bus Coupler
If a PLC program is to be used for controlling different configurations of a process, it may make sense to use
the same DP configuration even if the terminal configuration is different. In this case the address offsets in
the process image do not change, and the DP configuration of the PROFIBUS DP master does not have to
be re-saved for each version. With the multi-configuration mode it is now possible to define a maximum
configuration for the Bus Coupler, and in this case it will only be necessary to disable those terminals that
are not present in accordance with the current implementation level.
Reserved Bus Terminals
Because all the analog terminals are configured first in the DP configuration, before the digital terminals, the
consequence of inserting analog terminals at a later stage is that the address offsets of the digital terminals
are shifted. The insertion of a digital terminal within the existing terminal structure (which can, for instance,
be useful if digital terminals with different input voltages are used) also has the consequence that the offsets
of the digital terminals that follow it are shifted. If a digital terminal is inserted before the end terminal
however, the offset of the existing terminals are not shifted. With multi-configuration mode it is now possible
to configure additional terminals as reserves at any location within the terminal structure.
BK3xx0
Value Description
1 CfgData checking is deactivated
bin
Value Description
0 Analog modules are mapped in compact form (only with the input
bin
or output user data)
1 Analog modules are mapped in complex form (including control/
bin
status for register access and the same data length in the inputs
and outputs)
Version: 4.3.0
Extended functions
73