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4.4.3.1. Address assignment within the process image
Access to the encoder’s input and output data takes place via addresses within the PLC’s process image.
Assign these addresses according to the needs of the PLC software.
Go to the Step7
®
HW Config. window and click on the encoder symbol on the bus rail to select it. Bottom left
in the module window the various encoder modules are shown. A double click on submodule 1.2 (e. g.
"telegram 860") will open the property window with tab „addresses“.
Enter the start address of the respective address range or accept the system’s proposal. Identical or
overlapping addresses for input and output are possible. Make sure that the address ranges are located
inside the cyclically updated part process image “PIP” of the isochronous system task (e. g. OB61).
4.4.3.2. Synchronization Setup
Go to the Step7
®
HW Config. window and click on the encoder symbol on the bus rail to select it. Bottom left
in the module window the various encoder modules are shown. Enter the interface properties with a double
click on the „Interface“ module.
The „Synchronization“ tab shows the assignment to a certain sync domain. Set the synchronization role to
“Sync slave”.
In the tree menu under Configuration/RT Class/IRT, option
„IRT“ is pre-assigned to „High performance“.
