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Commissioning
Fig. 45: Application of a "Goto Link Variable", using "MAIN.bEL1004_Ch4" as an example
The process of assigning variables to the PDO is completed via the menu option "Actions" → "Create
assignment", or via
.
This can be visualized in the configuration:
The process of creating links can also be performed in the opposite direction, i.e. starting with individual
PDOs to a variable. However, in this example, it would not be possible to select all output bits for the
EL2008, since the terminal only makes individual digital outputs available. If a terminal has a byte, word,
integer or similar PDO, it is also possible to allocate this to a set of bit-standardized variables. Here, too, a
"Goto Link Variable" can be executed in the other direction, so that the respective PLC instance can then be
selected.
Activation of the configuration
The allocation of PDO to PLC variables has now established the connection from the controller to the inputs
and outputs of the terminals. The configuration can now be activated. First, the configuration can be verified
via
(or via "Actions" → "Check Configuration"). If no error is present, the configuration can be
activated via
(or via "Actions" → "Activate Configuration...") to transfer the System Manager settings
to the runtime system. Confirm the messages "Old configurations will be overwritten!" and "Restart TwinCAT
system in Run mode" with "OK".
A few seconds later, the real-time status
is displayed at the bottom right in the System Manager.
The PLC system can then be started as described below.
Starting the controller
Starting from a remote system, the PLC control has to be linked with the embedded PC over the Ethernet via
"Online" → "Choose Runtime System...":
EL3692
Version: 3.1
65
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