Fig. 27 Adding A Dp Slave - Beckhoff EL6731 Documentation

Parameterization and commissioning
Fig. 27: Adding a DP slave
In the case of modular slaves, it is then still necessary to add the terminal/IL modules (for Beckhoff slaves) or
the DP module (for devices from other manufacturers).
System Start
TwinCAT Config mode
For the TwinCAT configuration mode, it is only necessary to exchange data with the configured slaves. To
do this, TwinCAT configuration mode is started, and configuration of the DP master is activated using the
"Reload devices" button on the toolbar. After this, the data relating to the configured slaves can be read and
written on the associated Variables tab from the System Manager.
TwinCAT Run-Mode
For the TwinCAT Run mode, it is now necessary for at least one variable of the PROFIBUS master or of the
configured slave to be linked to a task. The project is then to be stored in the registry, and the TwinCAT
system then started in Run mode. Data exchange with the slaves is not carried out until the associated task
is started. If a number of tasks are linked with the PROFIBUS master or with the configured slave, then
whichever task has the highest priority must be started in order for data to be exchanged with the slave.
Bus parameters
The PROFIBUS DP-bus parameters can be found in the Bus parameters [} 87] dialog, which can be
selected via the "FC310x" or "EL6731" tab (Bus parameters (DP) button). They should only be modified by
experienced users.
EL6731 Version: 2.8 39