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ProSoft Technology MVI56-LTQ User Manual

Page 59

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MVI56-LTQ ♦ ControlLogix Platform

Reference

Limitorque Valve Actuator Master Communication Module

User Manual

ProSoft Technology, Inc.

Page 59 of 98

August 30, 2010

The following illustration shows the data transfer method used to move data
between the ControlLogix processor, the MVI56-LTQ module and the Limitorque
valve network.

All data transferred between the module and the processor over the backplane is
through the input and output images. Ladder logic must be written in the
ControlLogix processor to interface the input and output image data with data
defined in the Controller Tags. All data used by the module is stored in its internal
database. The following illustration shows the layout of the database:

Module’s Internal Database Structure

1500 registers for user data

0

Register Data

1499

2500 words of control data

1500

Control Data

3999