ProSoft MVI56-PDPMV1: ProFIBUS DPV1 Master Module Complete Guide

3.2 Software Installation

Install ProSoft Configuration Builder: Download the latest version of PCB from the official ProSoft website (www.prosoft technology. com/PCB). PCB is the core tool for configuring module PROFIBUS network and slave stations.

Install RSLogix 5000: Used to write control logic for the ControlLogix processor and interact I/O configuration and status data with the MVI56-PDPMV1 module. The module provides example ladder diagram programs and Add On Instruction (AOI) files, which can greatly simplify programming work.

4. Core working modes: LEGACY and FLEX

The MVI56-PDPMV1 module can operate in two core modes based on its firmware version: LEGACY mode and FLEX mode. Understanding the difference between these two modes is crucial for selecting appropriate example programs and optimizing performance.

4.1 LEGACY mode (backward compatible)

Applicable scenarios: The module firmware version is 0.30, or the firmware version is 1.21 or above and the configuration parameter "USE LEGACY MODE" is set to "YES".

Features:

Fixed I/O block size: The input block size is fixed at 250 words, and the output block size is fixed at 248 words.

Data integration: Status data, email messages, and I/O data are all transmitted through regular I/O blocks.

Advantages: Simple configuration, suitable for all firmware versions, providing complete backward compatibility.

4.2 FLEX mode (flexible and efficient)

Applicable scenario: The module firmware version is 1.21 or above, and the configuration parameter "USE LEGACY MODE" is set to "NO".

Features:

Variable I/O block size: The input block size can be adjusted between 12 and 250 words, and the output block size can be adjusted between 5 and 248 words.

Optimize data transmission: Status data, slave diagnostic data, and mailbox data are transmitted through MSG instructions instead of occupying regular I/O blocks. This helps to fully utilize I/O blocks for process data, thereby improving transmission efficiency.

Support IOT instructions: Immediate output instructions (IOT) can be used to override RPI time, achieving faster output data updates.

Advantage: Especially suitable for remote rack applications, saving ControlNet or EtherNet/IP bandwidth by optimizing I/O block size. Meanwhile, by separating state and process data, the backplane transmission performance has been improved.

5. Configure MVI56-PDPMV1 module

The configuration module requires the collaborative use of ProSoft Configuration Builder (PCB) and RSLogix 5000 software.

5.1 Setting Items in PCB

Start the PCB, create a new project, and select the "MVI56-PDPMV1" module type.

Set module parameters: Double click the "MVI56 PROFIBUS MASTER" object to set key module parameters:

INPUT DATA SIZE and OUTPUT DATA SIZE: Configure the word length of PROFIBUS input/output data (up to 768 words).

USE LEGACY MODE: Based on the above analysis, select the module working mode (YES/NO).

5.2 Configuring PROFIBUS Network

Install GSD file: The GSD file is a device description file for PROFIBUS slave stations. In the PCB, install the GSD files of all the slave devices that need to be connected through the "Tools" ->"Install New GS * File" menu.

Add and configure slaves:

In the "PROFIBUS DP" tree view, find the corresponding slave model and drag it to the bus configuration window.

Assign a unique PROFIBUS address (1-125) to the slave station.

Configure the required input/output modules based on the product specifications of the slave station. This is usually done in the 'Slot Location Grid'.

Automatic scanning function: PCB provides automatic network scanning function. If some slave stations have been connected on site, this function can be used to quickly discover them and attempt to match GSD files based on the detected identification bytes. This provides great convenience for quickly establishing project prototypes.

5.3 Generate and Export Processor Files

View memory mapping: After completing all slave configurations, click the "SHOW Memory MAP" button to print out the mapping relationship of PROFIBUS network data in the processor. This is very helpful for cross referencing I/O data in RSLogix.

Exporting processor files (key step): This is a crucial step in the integration of PCB and RSLogix.

For PCB v2.2.0 and higher versions: Click the "EXPORT PROCESS FILE" button, and the PCB will generate a complete, customized AOI (Add On Instruction) Rung Import file (. L5X) based on your current configuration (including the slave list and module parameters). This file contains all custom data types, controller labels, and ladder diagram instructions for calling AOI. Importing it into the RSLogix 5000 project will complete the setup of most program frameworks.

For early PCB versions: This operation generates a text file containing I/O mapping data types that need to be manually added to the project.

6. Integrate modules in RSLogix 5000

The steps for integrating modules in RSLogix 5000 may vary slightly depending on the selected mode.

6.1 General Settings

Select Controller Type: In RSLogix, ensure that the controller model and firmware version used in the project match the actual hardware.