ProSoft Technology MVI46-MBP User Manual

MVI46-MBP

SLC Platform

Modbus Plus Communication Module

User Manual

February 19, 2008

Please Read This Notice

Successful application of this module requires a reasonable working knowledge of the Rockwell
Automation SLC hardware, the MVI46-MBP Module and the application in which the combination is
to be used. For this reason, it is important that those responsible for implementation satisfy
themselves that the combination will meet the needs of the application without exposing personnel
or equipment to unsafe or inappropriate working conditions.

This manual is provided to assist the user. Every attempt has been made to ensure that the
information provided is accurate and a true reflection of the product's installation requirements. In
order to ensure a complete understanding of the operation of the product, the user should read all
applicable Rockwell Automation documentation on the operation of the Rockwell Automation
hardware.

Under no conditions will ProSoft Technology be responsible or liable for indirect or consequential
damages resulting from the use or application of the product.

Reproduction of the contents of this manual, in whole or in part, without written permission from
ProSoft Technology is prohibited.

Information in this manual is subject to change without notice and does not represent a
commitment on the part of ProSoft Technology Improvements and/or changes in this manual or the
product may be made at any time. These changes will be made periodically to correct technical
inaccuracies or typographical errors.

Your Feedback Please

We always want you to feel that you made the right decision to use our products. If you have
suggestions, comments, compliments or complaints about the product, documentation or support,
please write or call us.

ProSoft Technology

1675 Chester Avenue, Fourth Floor
Bakersfield, CA 93301
[phone]
[phone] (Fax)

http://www.prosoft-technology.com

Copyright © ProSoft Technology, Inc. 2000 - 2008. All Rights Reserved.

MVI46-MBP User Manual
February 19, 2008
PSFT.MBP.MVI46.UM.08.02.19

ProSoft Technology ®, ProLinx ®, inRAx ®, ProTalk® and RadioLinx ® are Registered Trademarks
of ProSoft Technology, Inc.

Contents MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

Contents

PLEASE READ THIS NOTICE................................................................................................................2

Your Feedback Please ...................................................................................................................... 2

GUIDE TO THE MVI46-MBP USER MANUAL.......................................................................................5

1 START HERE....................................................................................................................................7

1.1 System Requirements................................................................................................................. 7

1.2 Package Contents.......................................................................................................................8

1.3 Install the Module in the Rack..................................................................................................... 8

1.4 Connect your PC to the Processor ........................................................................................... 10

1.5 Download the Sample Program to the Processor.....................................................................11

1.5.1 Configuring RSLinx.................................................................................................................... 12

1.6 Connect your PC to the Module................................................................................................ 13

2 INSTALLING AND CONFIGURING THE MODULE.......................................................................15

2.1 Module Data..............................................................................................................................17

2.2 Module Configuration ................................................................................................................17

3 LADDER LOGIC .............................................................................................................................19

4 DIAGNOSTICS AND TROUBLESHOOTING.................................................................................21

4.1 Reading Status Data from the Module...................................................................................... 21

4.1.1 The Configuration/Debug Menu................................................................................................. 21

4.1.2 Required Hardware ...................................................................................................................22

4.1.3 Required Software..................................................................................................................... 22

4.1.4 Using the Configuration/Debug Port .......................................................................................... 22

4.1.5 Main Menu................................................................................................................................. 24

4.1.6 Data Analyzer............................................................................................................................ 28

4.1.7 Database View Menu ................................................................................................................31

4.1.8 Master Command Error List Menu............................................................................................. 33

4.2 LED Status Indicators ...............................................................................................................34

4.2.1 Troubleshooting......................................................................................................................... 35

5 REFERENCE...................................................................................................................................37

5.1 Product Specifications............................................................................................................... 37

5.1.1 Features and Benefits ...............................................................................................................37

5.1.2 General Specifications............................................................................................................... 38

5.1.3 Hardware Specifications............................................................................................................ 38

5.1.4 Functional Specifications........................................................................................................... 38

5.2 Functional Overview.................................................................................................................. 39

5.2.1 General Concepts...................................................................................................................... 39

5.2.2 Pass-Through Control Blocks.................................................................................................... 46

5.2.3 Data Flow between MVI46-MBP Module and SLC Processor................................................... 48

5.2.4 Dual Port Operation................................................................................................................... 55

5.3 RS-232 Configuration/Debug Port ............................................................................................57

5.3.1 Disabling the RSLinx Driver for the Com Port on the PC........................................................... 57

5.4 Modbus Plus Connections ........................................................................................................59

5.5 DB9 to RJ45 Adaptor (Cable 14) ..............................................................................................59

5.6 Modbus Plus Communication Port............................................................................................ 60

5.7 Database Definition...................................................................................................................60

5.7.1 Module Memory Map................................................................................................................. 60

5.7.2 Status Data Definition................................................................................................................ 61

5.7.3 Configuration Data..................................................................................................................... 66

5.7.4 Global Output Data.................................................................................................................... 74

5.7.5 Input File Data ........................................................................................................................... 74

5.7.6 Command Event Data ............................................................................................................... 75

ProSoft Technology, Inc. Page 3 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Contents
Modbus Plus Communication Module

5.8 Configuration Forms ................................................................................................................. 77

5.8.1 Module Configuration ................................................................................................................ 77

5.9 Frequently Asked Questions .................................................................................................... 87

5.9.1 How is data transferred between the SLC and the MVI46-MBP?.............................................. 87

5.9.2 How many registers can be used for user data? ....................................................................... 87

5.9.3 How is new configuration data written to the MVI46-MBP module? .......................................... 87

5.9.4 How is the current module configuration copied to the SLC memory? ...................................... 87

5.9.5 Why do I get an error code 3 every time I try to send configuration data from the module to the

processor and no data is moved?............................................................................................................ 87

5.9.6 Is it possible to create and send commands from the ladder logic? .......................................... 88

5.9.7 Is it possible to disable and enable commands in ladder?......................................................... 88

5.9.8 After I disable (or enable) a specific command, how do I check the status of the command?... 88

5.9.9 What happens if the MVI46-MBP module performs a COLDBOOT or WARMBOOT after

commands have been disabled by the ladder? ....................................................................................... 88

5.9.10 Does the MVI46-MBP operate as a Master and Slave simultaneously? ................................... 88

6 SUPPORT, SERVICE & WARRANTY........................................................................................... 89

6.1 How to Contact Us: Sales and Support.................................................................................... 90

6.2 Return Material Authorization (RMA) Policies and Conditions................................................. 91

6.2.1 All Product Returns ................................................................................................................... 91

6.3 Procedures for Return of Units Under Warranty ...................................................................... 91

6.4 Procedures for Return of Units Out of Warranty ...................................................................... 92

6.4.1 Un-repairable Units ................................................................................................................... 92

6.4.2 Purchasing Warranty Extension ................................................................................................ 93

6.5 LIMITED WARRANTY.............................................................................................................. 93

6.5.1 What Is Covered By This Warranty ........................................................................................... 93

6.5.2 What Is Not Covered By This Warranty..................................................................................... 94

6.5.3 DISCLAIMER REGARDING HIGH RISK ACTIVITIES .............................................................. 95

6.5.4 DISCLAIMER OF ALL OTHER WARRANTIES......................................................................... 95

6.5.5 LIMITATION OF REMEDIES**.................................................................................................. 95

6.5.6 Time Limit for Bringing Suit ....................................................................................................... 95

6.5.7 No Other Warranties ................................................................................................................. 96

6.5.8 Intellectual Property................................................................................................................... 96

6.5.9 Additional Restrictions Relating To Software And Other Intellectual Property........................... 96

6.5.10 Allocation of risks ...................................................................................................................... 96

6.5.11 Controlling Law and Severability ............................................................................................... 97

INDEX.................................................................................................................................................... 99

Page 4 of 101

February 19, 2008

Start Here MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

Guide to the MVI46-MBP User Manual

Function Section to Read Details

Introduction
(Must Do)

Verify Communication,
Diagnostic and
Troubleshooting

Reference
Product Specifications
Functional Overview
Glossary

Support, Service, and
Warranty

Index

→

→

→

→

Start Here (page 7)

Verifying
Communication
(page 34)

Diagnostics and
Troubleshooting
(page 21)

Reference (page

37)
Functional

Overview (page 39)
Product

Specifications
(page 37)

Support, Service
and Warranty
(page 89)

This Section introduces the customer to the
module. Included are: package contents,
system requirements, hardware installation,
and basic configuration.

This section describes how to verify
communications with the network. Diagnostic
and Troubleshooting procedures.

These sections contain general references
associated with this product, Specifications,
and the Functional Overview.

This section contains Support, Service and
Warranty information.

Index of chapters.

ProSoft Technology, Inc. Page 5 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Start Here
Modbus Plus Communication Module

Page 6 of 101 ProSoft Technology, Inc.

February 19, 2008

Start Here MVI46-MBP ♦ SLC Platform Modbus Plus Communication Module

1 Start Here

In This Chapter

 System Requirements .............................................................................7

 Package Contents ...................................................................................8

 Install the Module in the Rack .................................................................8

 Connect your PC to the Processor ........................................................10

 Download the Sample Program to the Processor..................................11

 Connect your PC to the Module ............................................................13

Installing the MVI46-MBP module requires a reasonable working knowledge of
the Rockwell Automation hardware, the MVI46-MBP Module and the application
in which they will be used.

Caution: It is important that those responsible for implementati on can complete the
application without exposing personnel, or equipment, to unsafe or inappropriate working
conditions. Safety, quality and experience ar e key factors in a successful installation.

1.1 System Requirements

The MVI46-MBP module requires the following minimum hardware and software
components:

 Rockwell Automation SLC 5/02 M0/M1 capable processors (or newer), with

compatible power supply and one free slot in the rack, for the MVI46-MBP
module. The module requires 800mA of available power.

 Rockwell Automation RSLogix 500 programming software.
 Rockwell Automation RSLinx communication software
 Pentium® II 500 MHz minimum. Pentium III 733 MHz (or better)

recommended

 Supported operating systems:

o Microsoft® Windows 98
o Windows NT® (version 4 with SP4 or higher)
o Windows 2000
o Windows XP

 32 Mbytes of RAM minimum, 64 Mbytes of RAM recommended
 50 Mbytes of free hard disk space (or more based on application

requirements)

 16-color VGA graphics adapter, 640 x 480 minimum resolution (256 Color

800 × 600 recommended)

ProSoft Technology, Inc. Page 7 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Start Here
Modbus Plus Communication Module

 CD-ROM drive
 3.5 inch floppy disk drive
 HyperTerminal or other terminal emulator program capable of file transfers

using Ymodem protocol.

1.2 Package Contents

The following components are included with your MVI46-MBP module, and are
all required for installation and configuration.

Important: Before beginning the installation, please verify that all of the following items ar e
present.

Qty. Part Name Part Number Part Description

1

1 Cable

1 Cable

1

MVI46-MBP
Module

ProSoft
Solutions
CD

MVI46-MBP Modbus Plus Communication Module

Cable #15, RS232
Null Modem

Cable #14, RJ45 to
DB9 Male Adapter

For RS232 Connection to the CFG Port

For DB9 Connection to the CFG Port

Contains sample programs, utilities and
documentation for the MVI46-MBP module.

If any of these components are missing, please contact ProSoft Technology
Support for replacement parts.

1.3 Install the Module in the Rack

If you have not already installed and configured your SLC processor and power
supply, please do so before installing the MVI46-MBP module. Refer to your
Rockwell Automation product documentation for installation instructions.

Warning: You must follow all safety instructions when installing this or any other electronic
devices. Failure to follow safety procedures could result in damage to hardware or data, or ev en
serious injury or death to personnel. Refer to the documentation for each device you plan to
connect to verify that suitable safety procedures ar e in place before installing or servicing the
device.

After you have checked the placement of the jumpers, insert MVI46-MBP into the
SLC™ chassis. Use the same technique recommended by Rockwell Automation
to remove and install SLC™ modules.

Warning: This module is not hot-swappable! Always remove power from the rack before
inserting or removing this module, or damage may result to the module, the processor, or other
connected devices.

1 Turn power OFF.

Page 8 of 101 ProSoft Technology, Inc.

February 19, 2008

Start Here MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

2 Align the module with the top and bottom guides, and slide it into the rack

until the module is firmly against the backplane connector.

3 With a firm but steady push, snap the module into place.
4 Check that the holding clips on the top and bottom of the module are securely

in the locking holes of the rack.

5 Make a note of the slot location. You will need to identify the slot in which the

module is installed in order for the sample program to work correctly. Slot
numbers are identified on the green circuit board (backplane) of the SLC
rack.

6 Turn power ON.

Note: If you insert the module improperly, the system may stop working, or may behave
unpredictably.

ProSoft Technology, Inc. Page 9 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Start Here
Modbus Plus Communication Module

1.4 Connect your PC to the Processor

1 Connect the right-angle connector end of the cable to your controller at the

communications port.

2 Connect the straight connector end of the cable to the serial port on your

computer.

Page 10 of 101 ProSoft Technology, Inc.

February 19, 2008

Start Here MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

1.5 Download the Sample Program to the Processor

To download the sample program from RSLogix 500 to the SLC processor:

Note: The key switch on the front of the SLC processor must be in the REM position.

1 If you are not already online to the processor, open the Communications

menu, and then choose Download. RSLogix will establish communication
with the processor.

2 Click the Download button to transfer the sample program to the processor.
3 RSLogix will compile the program and transfer it to the processor. This

process may take a few minutes.

4 When the download is complete, RSLogix will open another confirmation

dialog box. Click Yes to switch the processor from Program mode to Run
mode.

Note: If you receive an error message during these steps, refer to your RSLogix documentation to
interpret and correct the error.

ProSoft Technology, Inc. Page 11 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Start Here
Modbus Plus Communication Module

1.5.1 Configuring RSLinx

If RSLogix is unable to establish communication with the processor, follow these steps:

1 Open RSLinx.
2 Open the Communications menu, and choose Configure Drivers.

This action opens the Configure Drivers dialog box.

Note: If the list of configured drivers is blank, you must first choose and configure a driver from the
Available Driver Types list. The recommended driv er type to choose for serial communication with
the processor is "RS-232 DF1 Devices".

Page 12 of 101 ProSoft Technology, Inc.

February 19, 2008

Start Here MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

3 Click to select the driver, and then click Configure. This action opens the

Configure Allen-Bradley DF1 Communications Device dialog box.

4 Click the Auto-Configure button. RSLinx will attempt to configure your serial

port to work with the selected driver.

5 When you see the message "Auto Configuration Successful", click the OK

button to dismiss the dialog box.

Note: If the auto-configuration procedure fails, verify that the cables are connected correctly
between the processor and the serial port on your computer, and then try again. If you are still
unable to auto-configure the port, refer to yo ur RSLinx documentation for further troubleshooting
steps.

1.6 Connect your PC to the Module

With the module securely mounted, connect your PC to the Configuration/Debug
port using the RJ45-DB-9 Serial Adapter Cable and the Null Modem Cable
included in the package with the MVI46-MBP module.

1 Connect the RJ45-DB-9 Serial Adapter Cable to the Null Modem Cable.
2 Insert the RJ45 cable connector from the RJ45-DB-9 cable into the

Configuration/Debug port of the module.

3 Attach the other end to the serial port on your PC or laptop.

ProSoft Technology, Inc. Page 13 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Start Here
Modbus Plus Communication Module

Page 14 of 101 ProSoft Technology, Inc.

February 19, 2008

Installing and Configuring the Module MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

2 Installing and Configuring the Module

In This Chapter

 Module Data .......................................................................................... 17

 Module Configuration ............................................................................17

This chapter describes how to install and configure the module to work with your
application. The configuration process consists of the following steps.

1 Use RSLogix 500 to identify the module to the processor and add the module

to a project.

Note: The RSLogix 500 software must be in "offline" mode to add the module to a project.

2 Modify the example ladder logic to meet the needs of your application, and

copy the ladder logic to the processor. Example ladder logic files are provided
on the CD-ROM.

Note: If you are installing this module in an existin g application, you can copy the necessary
elements from the example ladder logic into your application.

The rest of this chapter describes these steps in more detail.
The first step in installing and configuring the module is to define the module to

the system. Select the I/O Configuration option from the program screen. This
displays the following dialog box:

ProSoft Technology, Inc. Page 15 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Installing and Configuring the Module
Modbus Plus Communication Module

Select the Other module from the list. This action opens the following dialog box.

Enter the module I/O card ID number as 13635, and then click OK. Double-click
the mouse on the module just added to the rack. Fill in the following dialog box
as shown in the following screen example:

Click OK to apply these settings to the module. Then, close the I/O Configuration
dialog box.

The next step is to define the user-defined files to hold status and read/write
database areas.

The last step is to add the ladder logic. If the example ladder logic is used, adjust
the ladder to fit the application. When the ladder example is not used, copy the
example ladder logic to your application and alter as necessary.

The module is now set up and ready to use with your application. Insert the
module in the rack, then attach the serial communication cable to the debug port
and the cable from the application port to the Modbus Plus network. Download
the new application to the controller and place the processor in run mode. If all
the configuration parameters are set correctly, and the module is attached to a
network, the module's Application LED (APP LED) should blink (6 times per
second) and the backplane activity LED (BP ACT) should blink very rapidly. If
you encounter errors, refer to the Diagnostics and Troubleshooting (page 21)
section for information on how to connect to the module's Config/Debug port to
use its troubleshooting features.

Page 16 of 101 ProSoft Technology, Inc.

February 19, 2008

Installing and Configuring the Module MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

2.1 Module Data

All data related to the MVI46-MBP module is stored in user defined data files and
the module's M1 and M0 files. Files should be defined for each data type to be
used with the module. Additionally, a file should be defined to hold the module
status data. The status data should be copied from the M1 file and placed in the
assigned status file. Read (monitor) data should be copied to the user files from
the M1 file and write (control) data should be copied from the user files to the M1
file.

2.2 Module Configuration

In order for the MVI46-MBP module to function in any of its possible modes, a
minimum amount of configuration data must be transferred to the module. The
following table provides an overview of the different types of configuration data
that the module will require, depending on the operating modes to be supported.

Module
Register
Address

4370 to 4409 Global In

4410 to 4449 Global In Input File Map If the module's Input File is to be used to transfer data

4450 to 5089 Global In

5090 to 7089 Master Master Command List If the module's Master Mode functionality is to be used,

Functional
Modes
Affected

Global Out
Slave
Master

Master

Name Description

General Module
Configuration

Device Definition If the module's Global Input or Master Mode functionality

This section of the configuration data contains the generic
module configuration data, and must be configured for the
module to operate.

from the module to the processor, then this section of
configuration data must be set up.

is to be used, then this section of configuration data must
be set up.

then he Master Command List must be set up.

Refer to the Reference chapter of this manual for a description of the
configuration of the module.

Important: The module will not function correctly until the Module Configuration Data is received
from the processor with at least the Local Modbus Plus Node Address set to a valid value.

The MVI46-MBP module must be configured at least once when the card is first
powered, and any time thereafter when the parameters must be changed.

Power Up

On power up, the module enters into a logical loop waiting to receive
configuration data from the processor. Upon receipt, the module begins
execution of the command list if present.

ProSoft Technology, Inc. Page 17 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Installing and Configuring the Module
Modbus Plus Communication Module

Changing Parameters During Operation

Changing values in the configuration table can be done at any time. Because the
module is operating using the live data in the internal database, any changes
made to the database become immediately active. This permits remote
programming of the module by any node on the Modbus Plus network. Care
must be taken when altering the parameters in an order that will not disturb any
running processes. New configuration data can be downloaded from the
database to the SLC processor by executing a write command with a value of
9997 to register 4370 in the module's internal database or M1 file. To force the
module to perform a warm-boot or cold-boot operation, write to register 4370 with
values of 9998 and 9999, respectively.

The only parameters that must be set through a restart of the module are related
to the read and write data sizes and registers for data transfer. These parameters
cannot be changed while the module is operating as it could place the module in
an inoperable mode.

Page 18 of 101 ProSoft Technology, Inc.

February 19, 2008

Ladder Logic MVI46-MBP ♦ SLC Platform Modbus Plus Communication Module

3 Ladder Logic

Ladder logic is required for application of the MVI46-MBP 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.

ProSoft Technology, Inc. Page 19 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Ladder Logic
Modbus Plus Communication Module

Page 20 of 101 ProSoft Technology, Inc.

February 19, 2008

Diagnostics and Troubleshooting MVI46-MBP ♦ SLC Platform Modbus Plus Communication Module

4 Diagnostics and Troubleshooting

In This Chapter

 Reading Status Data from the Module ..................................................21

 LED Status Indicators............................................................................ 34

The module provides information on diagnostics and troubleshooting in the
following forms:

 Status data values are transferred from the module to the processor.
 Data contained in the module can be viewed through the

Configuration/Debug port attached to a terminal emulator.

 LED status indicators on the front of the module provide information on the

module's status.

4.1 Reading Status Data from the Module

The MVI46-MBP module returns a 365-word Status Data area that can be used
to determine the module's operating status. This data is located in the module's
database and the M1 file at registers 4000 to 4365. Nodes on the Modbus Plus
network read this data area through the issuance of read commands to the
module. For a complete listing of the status data objects, Refer to the Reference
chapter.

The Configuration/Debug port provides the following functionality:

 Full view of the modules database
 View of the module's status data
 View of the module's configuration
 Version Information
 Control over the module (that is, cold boot)

4.1.1 The Configuration/Debug Menu

The Configuration and Debug menu for this module is arranged as a tree
structure, with the Main Menu at the top of the tree, and one or more sub-menus
for each menu command. The first menu you see when you connect to the
module is the Main menu.

Because this is a text-based menu system, you enter commands by typing the
command letter from your computer keyboard in the terminal application (for
example, HyperTerminal). The module does not respond to mouse movements
or clicks. The command executes as soon as you press the command letter —
you do not need to press [Enter]. When you type a command letter, a new
screen will be displayed in your terminal application.

ProSoft Technology, Inc. Page 21 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Diagnostics and Troubleshooting
Modbus Plus Communication Module

4.1.2 Required Hardware

You can connect directly from your computer's serial port to the serial port on the
module to view configuration information and perform maintenance.

ProSoft Technology recommends the following minimum hardware to connect
your computer to the module:

 80486 based processor (Pentium preferred)
 1 megabyte of memory
 At least one serial communications port available
 A null modem serial cable.

4.1.3 Required Software

In order to send and receive data over the serial port (COM port) on your
computer to the module, you must use a communication program (terminal
emulator).

A simple communication program called HyperTerminal is pre-installed with
recent versions of Microsoft Windows operating systems. If you are connecting
from a machine running DOS, you must obtain and install a compatible
communication program. The following table lists communication programs that
have been tested by ProSoft Technology.

DOS ProComm, as well as several other terminal emulation programs
Windows 3.1 Terminal
Windows 95/98 HyperTerminal
Windows NT/2000/XP HyperTerminal

4.1.4 Using the Configuration/Debug Port

To connect to the module's Configuration/Debug port:

1 Connect your computer to the module's port using a null modem cable.
2 Start the communication program on your computer and configure the

communication parameters with the following settings:

Baud Rate 57,600
Parity None
Data Bits 8
Stop Bits 1
Software Handshaking None

3 Open the connection. When you are connected, press the [?] key on your

keyboard. If the system is set up properly, you will see a menu with the
module name followed by a list of letters and the commands associated with
them.

Page 22 of 101 ProSoft Technology, Inc.

February 19, 2008

Diagnostics and Troubleshooting MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

If there is no response from the module, follow these steps:
1 Verify that the null modem cable is connected properly between your

computer's serial port and the module. A regular serial cable will not work.

2 Verify that RSLinx is not controlling the COM port. Refer to Disabling the

RSLinx Driver for the Com Port on the PC (page 57).

3 Verify that your communication software is using the correct settings for baud

rate, parity and handshaking.

4 On computers with more than one serial port, verify that your communication

program is connected to the same port that is connected to the module.

If you are still not able to establish a connection, you can contact ProSoft
Technology Technical Support for further assistance.

Navigation

All of the sub-menus for this module contain commands to redisplay the menu or
return to the previous menu. You can always return from a sub-menu to the next
higher menu by pressing [M] on your keyboard.

The organization of the menu structure is represented in simplified form in the
following illustration:

The remainder of this section shows you the menus available for this module,
and briefly discusses the commands available to you.

Keystrokes

The keyboard commands on these menus are almost always non-case sensitive.
You can enter most commands in lower case or capital letters.

The menus use a few special characters ([?], [-], [+], [@]) that must be entered
exactly as shown. Some of these characters will require you to use the [Shift],
[Ctrl] or [Alt] keys to enter them correctly. For example, on US English
keyboards, enter the [?] command as [Shift][/].

Also, take care to distinguish capital letter [I] from lower case letter [l] (L) and
number [1]; likewise for capital letter [O] and number [0]. Although these
characters look nearly the same on the screen, they perform different actions on
the module.

ProSoft Technology, Inc. Page 23 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Diagnostics and Troubleshooting
Modbus Plus Communication Module

4.1.5 Main Menu

When you first connect to the module from your computer, your terminal screen
will be blank. To activate the main menu, press the [?] key on your computer's
keyboard. If the module is connected properly, the following menu will appear on
your terminal screen:

Caution: Some of the commands available to you from this menu ar e designed for advanced
debugging and system testing only, and can cause the module to stop communicating with the
processor or with other devices, resulting in potential data loss or other failures. Only use these
commands if you are specifically directed to do so by ProSoft Technology, Inc. Technical Support
staff. Some of these command keys are not listed on the menu, but are active nevertheless. Please
be careful when pressing keys so that you do not accidentally execute an unwanted command.

Opening the Data Analyzer Menu

Press [A] to open the Data Analyzer Menu. Use this command to view all bytes
of data transferred on each port. Both the transmitted and received data bytes
are displayed. Refer to Data Analyzer for more information about this menu.

Important: When in analyzer mode, program execution will slow down. Only use this tool during a
troubleshooting session. Before disconnecting from the Config/Debug port, please be sure to press
[M] to return to the main menu and disable the data analyzer. This action will allow the module to
resume its normal operating mode.

Viewing Backplane Diagnostic Information

Press [B] from the Configuration/Debug Menu to view the Backplane Diagnostic
Information screen.

Use this command to display the configuration and statistics of the backplane
data transfer operations between the module and the processor. The information
on this screen can help determine if there are communication problems between
the processor and the module.

Tip: Repeat this command at one-second intervals to determine the number of blocks transferred
each second.

Page 24 of 101 ProSoft Technology, Inc.

February 19, 2008

Diagnostics and Troubleshooting MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

Viewing Module Configuration

Press [C] to view the Module Configuration screen.
Use this command to display the current configuration and statistics for the

module.

Opening the Database Menu

Press [D] to open the Database View menu. Use this menu command to view the
current contents of the module's database.

Opening the Command Error List Menu

Press [I] to open the Command Error List. This list consists of multiple pages of
command list error/status data. Press [?] to view a list of commands available on
this menu.

Viewing Global Input Status and Counter Data

Press [G] to view the Global Input Status and Counter data for each Modbus
Plus node defined in the Device Definition Table.

The Status data area displays the current status of each node on the network.
Refer to the Module Set Up section for a complete listing and definition of the
status codes. The Counters section displays the number of Global Input data
messages received from the device.

Opening the Device Definition List Menu

Press [L] to open the Device Definition List. This list consists of multiple pages of
device definition data. Press [?] to view a list of commands available on this
menu.

ProSoft Technology, Inc. Page 25 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Diagnostics and Troubleshooting
Modbus Plus Communication Module

Viewing I/O File Data

Press [O] to display the module's global input and output data.

The In File Address Map, values represent the data set for selecting the
registers in the module's database to transfer to the In File Data area. The In File
Data section displays the current values transferred from the module to the SLC
processor. The Out File Data section contains the values used for Global Output
Data to be transferred from the module to the Modbus Plus network.

Viewing Version Information

Press [V] to view Version information for the module.
Use this command to view the current version of the software for the module, as

well as other important values. You may be asked to provide this information
when calling for technical support on the product.

Values at the bottom of the display are important in determining module
operation. The Program Scan Counter value is incremented each time a
module's program cycle is complete.

Tip: Repeat this command at one-second intervals to determine the frequency of program
execution.

Warm Booting the Module

Caution: Some of the commands available to you from this menu ar e designed for advanced
debugging and system testing only, and can cause the module to stop communicating with the
processor or with other devices, resulting in potential data loss or other failures. Only use these
commands if you are specifically directed to do so by ProSoft Technology Technical Support staff.
Some of these command keys are not listed on the menu, but are active nevertheless. Please be
careful when pressing keys so that you do not accidentally execute an unwanted co mmand.

Press [W] from the Main Menu to warm boot (restart) the module. This command
will cause the program to exit and reload, refreshing configuration parameters
that must be set on program initialization. Only use this command if you must
force the module to re-boot.

Page 26 of 101 ProSoft Technology, Inc.

February 19, 2008

Diagnostics and Troubleshooting MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

Viewing the Event Command Enable List

Press [X] to view the Event Command Enable List. Use this command to display
the status of each of the event command enable bits received from the SLC
processor.

If the event command bit is set, a value of 1 will be displayed. A value of 0
indicates the command event bit is clear. Each bit in the table corresponds to an
associated command in the master command table. The bits displayed are
shown with the high-bits in the word on the left side and the least-significant bit
on the right side. Therefore, bit 15 (command 16) is the first bit displayed in the
upper-right of the list and bit 0 (command 1) is the last bit of the first row of data.

Transferring Module Configuration to the Processor

Press [Y] to transfer the module's configuration data to the processor. Ladder
logic is required in the processor to receive and implement the updated
configuration. You will be prompted to confirm the transfer.

If the operation is not successful, an error code will be returned.

Code Description

0 Transfer successful

-1 Error transferring module configuration data (block -9000)

-2 Error transferring device definition data (blocks -9100 to -9103)

-3 Error transferring master command list data (blocks -6000 to -6007)

After successful data transfer, the module will perform a warm-boot operation to
read in the new data.

Viewing Communication Status

Press [1] to view the communication status and statistics of the Modbus Plus
Network for the module's node address. This command is useful for
troubleshooting purposes.

Exiting the Program

Caution: Some of the commands available to you from this menu ar e designed for advanced
debugging and system testing only, and can cause the module to stop communicating with the
processor or with other devices, resulting in potential data loss or other failures. Only use these
commands if you are specifically directed to do so by ProSoft Technology Technical Support staff.
Some of these command keys are not listed on the menu, but are active nevertheless. Please be
careful when pressing keys so that you do not accidentally execute an unwanted co mmand.

ProSoft Technology, Inc. Page 27 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Diagnostics and Troubleshooting
Modbus Plus Communication Module

Press [Esc] to restart the module and force all drivers to be loaded. The module
will use the configuration stored in the module's Flash ROM to configure the
module.

4.1.6 Data Analyzer

Use this menu to display Modbus Plus messages generated and received by the
module. This tool is extremely useful in determining the operation of the module
and nodes on the network. Press [?] to view the list of commands available on
this menu. In the following illustration, master command status errors can be
resolved.

Use the commands on this menu to choose the type of data to view. You can
view more than one type of data at the same time. For example, to view the
master command processing of messages from the MVI46-MBP module to other
nodes on the network, press [2], and then press [5]. All master Put and Get
messages handled by the module will be displayed on the screen.

The Current Debug Level parameter displayed at the bottom of the display
shows the current debug level being monitored by the analyzer. A value of 0000
indicates that the analyzer is not monitoring any messages.

(0x0000) Turn Debug off

Press [0] (zero) to turn the analyzer off. This is useful to freeze the analyzer
screen with the last values displayed. If you are using a terminal emulation
program that buffers previously received data, you can scroll through the
acquired data to view the transactions that occurred on the Modbus Plus
interface by the module.

(0x0001) Service Requests

Press [1] to view all service request operations performed. After selecting the
option, the screen should scroll very rapidly as these messages are trapped. An
example display is shown below:

Page 28 of 101 ProSoft Technology, Inc.

February 19, 2008

Diagnostics and Troubleshooting MVI46-MBP ♦ SLC Platform
Modbus Plus Communication Module

(0x0002) Put Master Command to Output Path

Press [2] to display master command requests sent from the module to the
network. Example output of this option is shown below:

(0x0004) Get Slave Command from Input Path

Press [3] to display slave request messages received for the module. Example
output of this option is shown below:

(0x0008) Put Slave Response to Input Path

Press [4] to display slave response messages sent to requests made by other
nodes on the network to the module. Example output of this option is shown
below:

(0x0010) Get Master Response from Output Path

Press [5] to display master response messages received from other nodes on
the network in response to command requests made by the module. Example
output of this option is shown below:

(0x0020) Abort Transaction

Press [6] to display any abort transaction messages processed on the Modbus
Plus network by the module.

(0x0040) Configuration Status

Press [7] to display any configuration status messages processed by the module.

ProSoft Technology, Inc. Page 29 of 101
February 19, 2008

MVI46-MBP ♦ SLC Platform Diagnostics and Troubleshooting
Modbus Plus Communication Module

(0x0080) Interface Diagnostics

Press [8] to display any interface diagnostic messages processed by the module.

(0x0100) Software Reset

Press [9] to display any software-reset commands sent from the module to the
Modbus Plus Chipset.

(0x0200) Put Global Data

Press [A] to display any global output messages processed by the module. The
following illustration shows an example of the output.

(0x0400) Get Global Data

Press [B] to display any global input messages processed by the module. The
following illustration shows an example of the output.

Returning to the Main Menu

Press [M] to return to the Main Menu.

Page 30 of 101 ProSoft Technology, Inc.

February 19, 2008