Pos : 66.8 /All e Seri en ( Allgemei ne Module)/Ü bers chriften für alle Serien/__ noch nic ht ei ns ortierte Ü berschriften müss en noc h eins orti ert werden __Pr oz ess datenaufbau - Übersc hrift 2 @ 5\mod_1245069543813_21.doc x @ 35310 @ 2 @ 1

7.4

Process Data Architecture

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7.4.1

Basic Structure

A node can consist of a mixed arrangement of analog and digital, system and

special function modules.

For the configuration only I/O modules are taken into account, which exchange

process data on the internal bus (K-Bus) with the fieldbus coupler (data width or

bit width greater than 0).

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The input and output process images which are exchanged with the respective

IOC using real time frames are only available on a successful connection

establishment to the particular IOC.

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Additional Information

For the number of input and output bits or bytes of the individual I/O modules,

refer to the corresponding description of the I/O modules.

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For the local input and output process data image, the data of the configured I/O

modules is stored in the order of its position next to the fieldbus coupler in the

respective process image.

The size of the process image is determined by the configuration data of the

fieldbus coupler and of the I/O modules connected to it.

If the maximum size is exceeded in the respective process image, an error

message appears in the configuration software being used.

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The process image is limited to 256 bytes of input or output data. Thus, up to 128

I/O modules can be connected to the fieldbus coupler until the process image

reaches a maximum size of 256 bytes in the input and/or in the output direction.

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More information on configuration limits!

For additional information to the configuration limits refer to "Configuration

limits" section.

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7.4.1.1