ProSoft Technology MVI56E-MNETC - Manual (Page 77)

MVI56E-MNETC ♦ ControlLogix Platform Ladder Logic
Modbus TCP/IP Client Enhanced Communication Module User Manual
ProSoft Technology, Inc. Page 77 of 183
February 3, 2013
3 Ladder Logic
In This Chapter
 Controller Tags ...................................................................................... 78
 User-Defined Data Types (UDTs) ......................................................... 80
 Using Controller Tags ............................................................................ 82
 Controller Tag Overview ........................................................................ 82
Ladder logic is required for managing communication between the MVI56E-
MNETC module and the processor. The ladder logic handles tasks such as:
 Module backplane data transfer
 Special block handling
 Status data receipt
Additionally, a power-
up handler may be needed to initialize the module’s
database and may clear some processor fault conditions.
The sample Import Rung with Add-On Instruction is extensively commented to
provide information on the purpose and function of each user-defined data type
and controller tag. For most applications, the Import Rung with Add-On
Instruction will work without modification.