3 ladder logic – ProSoft Technology MVI56-101S User Manual
Page 71
MVI56-101S ♦ ControlLogix Platform
Ladder Logic
IEC 60870-5-101 Slave Communication Module
User Manual
ProSoft Technology, Inc.
Page 71 of 193
August 2, 2011
3 Ladder
Logic
In This Chapter
Module Data Object (ModuleDef870) .................................................... 72
Adding the Module to an Existing Project .............................................. 74
Ladder logic is required for the MVI56-101S module to work. 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 inRAx 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.