Siemens SIMADYN D Manual page 259

Communications configuring
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Fig. 3-65 Symbolic hardware assignment of an EXM 448-1
Different symbolic names are assigned for each SIMOLINK interface.
For example, when configuring an ITSL module, symbolic names are
entered for the integrated (TAD) and the optional SIMOLINK interface
(OAD) under the "Addresses" tab:
Fig. 3-66 Setting hardware addresses for an ITSL module with optional SLB module
System- and communication configuring D7-SYS - SIMADYN D
Edition 12.2003