Peripheral Devices
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8.12.1.3 Set up shared variables
A number of signals are predefined in the PLC, but signals can be added, delete, or get a changed
functionality. Signals under the group Shared_Variables in the Global variables sheet in the PLC can be
shared between I/O and fieldbus. Signals under the group Fieldbus_Variables represent the fieldbus
mapping.
When converting a setup older than version 7.5.0, the PLC will not have the same signals defined. Access
to the PLC part of the fieldbus data area from the PowerMACS PLC is configured in two steps. First you
must configure how the respective area should be used by defining variables. Secondly must configure
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