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6.9 Deviations from the standard I/O addressing schematic

6.9.1

Overview

Use of user-specific adaptations of an addressing schematic

In some cases when configuring in the TIA Portal, the preset default I/O addresses for the

communication with the drive have already been assigned, e.g.:

● If you added telegrams that are not part of the default telegram configuration.

● If you have subsequently changed the size of the process image.

● If you have subsequently changed the Safety Integrated mode.

● If you have subsequently added NX modules.

A message is then displayed in the TIA Portal, indicating that you must check the telegram

configuration. The actual procedure depends on whether suitable alternative I/O addresses

could be assigned:

● Suitable alternative I/O addresses have been assigned in the TIA Portal that do not match

the standard I/O addresses in the machine data of the NCU. In this case, the I/O addresses

in the TIA Portal must be aligned with the I/O addresses in the machine data of the NCU

(Page 143).

● There are not enough suitable I/O addresses available in the TIA Portal. In this case, you

must release suitable I/O addresses in the TIA Portal, re-assign them and then align them

with the I/O addresses in the machine data of the NCU. See: Availability of suitable I/O

addresses (Page 145).

If you do not want to make these settings at this time, and have not saved the project, you can

undo the changes: Click "Undo" in the toolbar.

Siemens MCP 398C Configuration Manual

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