MVI69E-MBS ♦ CompactLogix Platform MVI69E-MBS Backplane Data Exchange
Modbus Serial Enhanced Communication Module User Manual
ProSoft Technology, Inc. Page 63 of 154
June 28, 2017
4 MVI69E-MBS Backplane Data Exchange
In This Chapter
General Concepts of the MVI69E-MBS Data Transfer .......................... 63
Backplane Data Transfer ....................................................................... 64
Normal Data Transfer ............................................................................ 65
Data Flow Between the Module and Processor ..................................... 70
4.1 General Concepts of the MVI69E-MBS Data Transfer
The MVI69E-MBS module uses ladder logic to communicate with the
CompactLogix or MicroLogix 1500-LRP processor across the backplane. The
ladder logic handles the module data transfer, configuration data transfer, special
block handling, and status data receipt.
The following topics describe several concepts that are important for
understanding the operation of the MVI69E-MBS module. This is the order of
operations on power-up:
1 The module begins the following logical functions:
o Initialize hardware components
o Initialize CompactLogix or MicroLogix 1500-LRP backplane driver
o Test and clear all RAM
2 Read configuration from the CompactLogix or MicroLogix 1500-LRP
processor through ladder logic
3 Allocate and initialize Module Register space
4 Enable Modbus application port(s)
After the module has received the module configuration, the module begins
communicating with other devices on the Modbus network, depending on the
Modbus configuration of the module.
To Next Page
Loading...
