ProSoft Technology MVI69-MCM - Manual (Page 69)

MVI69-MCM ♦ CompactLogix or MicroLogix Platform Ladder Logic
Modbus Communication Module User Manual
ProSoft Technology, Inc. Page 69 of 167
March 22, 2011
3 Ladder Logic
In This Chapter
 Ladder Logic and Firmware Compatibility Note ..................................... 70
 Module Data Object (MCM1ModuleDef)................................................ 71
 Adding the Module to an Existing CompactLogix Project ...................... 75
 Adding the Module to an Existing MicroLogix Project ............................ 79
Ladder logic is required for application of the MVI69-MCM 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.