I/O Terminal /
EXTENDED FUCNTIONS
50
The digital terminals are to be declared as Multi-Cfg mode modules at their true
position
The digital terminals are to be declared after the analog modules moreover as
input/output sum modules, corresponding to their bit width, as is also the case for
standard configuration in the process image.
All modules for the maximum configuration, including the reserve modules, are to be
declared
Modules that are not inserted must be disabled
7.4.6 Enabling/disabling Bus Terminals
Those Bus Terminals that are present in the DP configuration, but that are not in fact plugged
in, must be disabled. This can be done in the UserPrmData, via DPV1 or through the 2-byte
PLC interface.
Making the setting through DPV1 or through the 2-byte PLC interface has the advantage that
the terminal assignment for the multi-configuration mode can usually be made directly from
the PLC program, without having to change the DP configuration of the master.
As long as the inserted Bus Terminals do not agree with the non-disabled Bus Terminals to
be expected from the DP configuration, the Bus Terminal will normally set the Stat_Diag bit in
the diagnostic data, with the consequence that it is not yet ready for cyclic data exchange.
If, however, the enabling and disabling is to be carried out via the 2-byte PLC interface, it is a
precondition for function of the 2-byte PLC interface that the coupler is in cyclic data
exchange mode. For that reason it is also possible to deactivate remaining in the Stat_Diag
state:
Byte
Bit
Description
3
6
1: In multi-configuration mode the coupler also enters the data
exchange even when the configuration is not consistent, although
Standard-Bus cycles are not yet executed
Enabling/disabling via UserPrmData
The assignment of the terminals (a maximum of 128 terminals is possible) is entered from
byte 15 to byte 30 and from byte 41 to byte 56 of the UserPrmData. Two bits are reserved
here for each terminal, indicating whether the relevant terminal is enabled (value 0) or
disabled (value 2). If the UserPrmData is to be displayed as text in the DP configuration tool,
then the parameters Assignment of module x are to be set to DP DataExchange (enabled) or
Multi-Config. mode (disabled).