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Ladder logic, 3 ladder logic – ProSoft Technology MVI71-DNP User Manual

Page 57

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Ladder Logic

MVI71-DNP ♦ PLC Platform

DNP 3.0 Master/Slave Communication Module

ProSoft Technology, Inc.

Page 57 of 172

August 23, 2007

3 Ladder

Logic

Ladder logic is required for application of the MVI71-DNP module. Tasks that
must be handled by the ladder logic are module data transfer, special block
handling and status data receipt. Additionally, a power-up handler may be
needed to handle the initialization of the module's data and to clear any
processor fault conditions.

The sample ladder logic, on the ProSoft Solutions CD-ROM, is extensively
commented, to provide information on the purpose and function of each rung. For
most applications, the sample ladder will work without modification.