ProSoft Technology MVI69L-MBS ProductsModbus Serial Lite Communication Module for CompactLogix User Manual

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MVI69L-MBS

CompactLogix ™ Platform

Modbus Serial Lite Communication

Module

USER MANUAL

April 7, 2021

MVI69L-MBS ♦ CompactLogix™ Platform

Modbus Serial Lite Communication Module

Your Feedback Please

Contents

User Manual

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 our products, documentation, or support, please contact us.

How to Contact Us

ProSoft Technology, Inc.

+1 (661) 716-5100

+1 (661) 716-5101 (Fax) www.prosoft-technology.com

[email protected]

MVI69L-MBS User Manual

April 7, 2021

ProSoft Technology ® , is a registered copyright of ProSoft Technology, Inc. All other brand or product names are or may be trademarks of, and are used to identify products and services of, their respective owners.

In an effort to conserve paper, ProSoft Technology no longer includes printed manuals with our product shipments. User Manuals, Datasheets, Sample Ladder Files, and Configuration Files are provided at our website: www.prosoft-technology.com

Content Disclaimer

This documentation is not intended as a substitute for and is not to be used for determining suitability or reliability of these products for specific user applications. It is the duty of any such user or integrator to perform the appropriate and complete risk analysis, evaluation and testing of the products with respect to the relevant specific application or use thereof. Neither ProSoft Technology nor any of its affiliates or subsidiaries shall be responsible or liable for misuse of the information contained herein. Information in this document including illustrations, specifications and dimensions may contain technical inaccuracies or typographical errors. ProSoft Technology makes no warranty or representation as to its accuracy and assumes no liability for and reserves the right to correct such inaccuracies or errors at any time without notice. If you have any suggestions for improvements or amendments or have found errors in this publication, please notify us.

No part of this document may be reproduced in any form or by any means, electronic or mechanical, including photocopying, without express written permission of ProSoft Technology. All pertinent state, regional, and local safety regulations must be observed when installing and using this product. For reasons of safety and to help ensure compliance with documented system data, only the manufacturer should perform repairs to components. When devices are used for applications with technical safety requirements, the relevant instructions must be followed. Failure to use ProSoft Technology software or approved software with our hardware products may result in injury, harm, or improper operating results. Failure to observe this information can result in injury or equipment damage.

For professional users in the European Union

If you wish to discard electrical and electronic equipment (EEE), please contact your dealer or supplier for further information.

Warning – Cancer and Reproductive Harm – www.P65Warnings.ca.gov

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Modbus Serial Lite Communication Module

Important Safety Information

Contents

User Manual

North America Warnings

A This Equipment is Suitable For Use in Class I, Division 2, Groups A, B, C, D or Non-Hazardous

Locations Only.

B Warning – Explosion Hazard – Substitution of Any Components May Impair Suitability for Class I,

Division 2.

C Warning – Explosion Hazard – Do Not Disconnect Equipment Unless Power Has Been Switched Off Or

The Area is Known To Be Non-Hazardous.

D The subject devices are powered by a Switch Model Power Supply (SMPS) that has regulated output voltage of 5 VDC.

ATEX/IECEx Warnings and Conditions of Safe Usage:

Power, Input, and Output (I/O) wiring must be in accordance with the authority having jurisdiction.

A Warning - Explosion Hazard - When in hazardous locations, turn off power before replacing or wiring modules.

B Warning - Explosion Hazard - Do not disconnect equipment unless power has been switched off or the area is known to be non-hazardous.

C These products are intended to be mounted in an ATEX/IECEx Certified, tool-secured, IP54 enclosure.

The devices shall provide external means to prevent the rated voltage being exceeded by transient disturbances of more than 40%. This device must be used only with ATEX certified backplanes.

D Before operating the reset switch, be sure the area is known to be non-hazardous.

If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

Agency Approvals & Certifications

Please visit our website: www.prosoft-technology.com

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Modbus Serial Lite Communication Module

Contents

User Manual

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

How to Contact Us ....................................................................................................................... 2

Content Disclaimer ...................................................................................................................... 2

Important Safety Information ....................................................................................................... 3

1 Start Here

1.1

1.2

1.3

1.4

1.5

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

Deployment Checklist ........................................................................................ 8

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

Setting Jumpers ................................................................................................. 9

Installing the Module in the Rack ..................................................................... 10

2 Adding the Module to RSLogix

2.1

2.1.1

2.2

2.1.2

2.3

2.3.1

2.4

2.3.2

2.5

2.6

2.6.1

2.6.2

Creating the Module in an RSLogix 5000 Project............................................ 14

Creating a Module in the Project Using an Add-On Profile ............................. 15

Creating a Module in the Project Using a Generic 1769 Module Profile ......... 19

Installing ProSoft Configuration Builder ........................................................... 22

Generating the AOI (.L5X File) in ProSoft Configuration Builder .................... 22

Setting Up the Project in PCB .......................................................................... 22

Creating and Exporting the .L5X File ............................................................... 24

Creating a New RSLogix 5000 Project ............................................................ 26

Importing the Add-On Instruction ..................................................................... 27

Adding Multiple Modules in the Rack (Optional) .............................................. 31

Adding an Additional Module in PCB ............................................................... 31

Adding Additional MVI69L-MBS Modules in RSLogix 5000 ............................ 33

3 Configuring the MVI69L-MBS Using PCB

3.1

3.1.1

3.1.2

3.1.3

3.2

3.1.4

3.3

3.4

3.2.1

3.2.2

3.2.3

3.2.4

Basic PCB Functions ....................................................................................... 40

Creating a New PCB Project and Exporting an .L5X File ................................ 40

Renaming PCB Objects ................................................................................... 40

Editing Configuraiton Parameters .................................................................... 40

Printing a Configuration File ............................................................................ 43

Module Configuration Parameters ................................................................... 43

Module Parameters ......................................................................................... 43

MBS Port 1 Parameters ................................................................................... 44

Modbus Port 1 Commands .............................................................................. 48

Ethernet 1 ........................................................................................................ 50

Downloading the Configuration File to the Processor ..................................... 51

Uploading the Configuration File from the Processor ...................................... 53

4 MVI69L-MBS Backplane Data Exchange

4.1

4.2

4.3

4.3.1

General Concepts of the MVI69L-MBS Data Transfer .................................... 56

Backplane Data Transfer ................................................................................. 56

Normal Data Transfer ...................................................................................... 57

Write Block: Request from the Processor to the Module ................................. 57

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4.4

4.3.2

4.3.3

4.4.1

4.4.2

Contents

User Manual

Read Block: Response from the Module to the Processor .............................. 58

Read and Write Block Transfer Sequences .................................................... 58

Data Flow Between the Module and Processor .............................................. 59

Slave Mode ...................................................................................................... 59

Master Mode .................................................................................................... 61

5 Using Controller Tags

5.1

5.1.1

5.2

5.3

5.2.1

5.3.1

5.3.2

5.3.3

5.3.4

5.3.5

Controller Tags ................................................................................................ 63

MVI69L-MBS Controller Tags .......................................................................... 64

User-Defined Data Types (UDTs).................................................................... 64

MVI69L-MBS User-Defined Data Types .......................................................... 65

MBS Controller Tag Overview ......................................................................... 66

MBS.CONFIG .................................................................................................. 66

MBS.DATA ....................................................................................................... 66

MBS.CONTROL............................................................................................... 67

MBS.STATUS .................................................................................................. 70

MBS.UTIL ........................................................................................................ 71

6 Diagnostics and Troubleshooting

6.1

6.2

6.3

6.3.1

6.4

6.2.1

6.2.2

6.4.1

6.4.2

6.4.3

6.4.4

6.5

6.4.5

6.4.6

6.5.1

6.5.2

6.6

6.5.3

Ethernet LED Indicators ................................................................................... 72

LED Status Indicators ...................................................................................... 73

Clearing a Fault Condition ............................................................................... 73

Troubleshooting ............................................................................................... 74

Connecting the PC to the Module's Ethernet Port ........................................... 75

Setting Up a Temporary IP Address ................................................................ 76

Using the Diagnostics Menu in PCB ................................................................ 78

Diagnostics Menu ............................................................................................ 80

Monitoring General Information ....................................................................... 80

Monitoring Network Configuration Information ................................................ 81

Monitoring Backplane Information ................................................................... 82

Port 1 Module Information ............................................................................... 83

Monitoring Data Values in the Module’s Database.......................................... 83

Communication Error Codes ........................................................................... 84

Standard MODBUS Protocol Exception Code Errors ...................................... 84

Module Communication Error Codes .............................................................. 84

Command List Entry Errors ............................................................................. 84

Connecting to the MVI69L-MBS Webpage ...................................................... 85

7 Reference 87

7.1

7.1.1

7.1.2

7.1.3

7.2

7.2.1

7.2.2

7.2.3

7.2.4

7.2.5

7.2.6

ProSoft Technology, Inc.

Product Specifications ..................................................................................... 87

MVI69L General Specs .................................................................................... 87

Hardware Specifications .................................................................................. 87

General Specifications - Modbus Master/Slave ............................................... 88

About the Modbus Protocol ............................................................................. 89

Modbus Master ................................................................................................ 89

Modbus Slave .................................................................................................. 89

Function Codes Supported by the Module ...................................................... 90

Read Coil Status (Function Code 01) .............................................................. 91

Read Input Status (Function Code 02) ............................................................ 93

Read Holding Registers (Function Code 03) ................................................... 94

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7.2.7

7.2.8

7.2.9

7.2.10

7.2.11

7.2.12

7.3

7.3.1

7.4

7.3.2

7.4.1

7.4.2

7.4.3

7.4.4

7.4.5

7.4.6

7.4.7

7.4.8

7.4.9

7.4.10

7.4.11

7.4.12

7.4.13

(9956)

7.4.14

(9957)

7.4.15

7.4.16

7.4.17

7.4.18

7.4.19

7.4.20

7.4.21

7.4.22

7.5

7.4.23

7.6

7.5.1

7.6.1

7.6.2

7.6.3

7.6.4

Contents

User Manual

Read Input Registers (Function Code 04) ....................................................... 95

Force Single Coil (Function Code 05) ............................................................. 96

Preset Single Register (Function Code 06) ..................................................... 97

Diagnostics (Function Code 08) ...................................................................... 98

Force Multiple Coils (Function Code 15) ....................................................... 100

Preset Multiple Registers (Function Code 16) ............................................... 101

Floating-Point Support ................................................................................... 102

ENRON Floating Point Support ..................................................................... 102

Configuring the Floating Point Data Transfer ................................................ 103

Function Blocks.............................................................................................. 108

Event Command Blocks (1000 to 1255) ........................................................ 109

Slave Polling Disable Block (3000) ................................................................ 110

Slave Polling Enable Blocks (3001) ............................................................... 110

Slave Polling Status Block (3002 to 3006) .................................................... 111

Command Control Blocks (5001 to 5006) ..................................................... 112

Add Event with Data Block (8000) ................................................................. 113

Get Event with Data Status Block (8100) ...................................................... 114

Get Configuration File Information Block (9000 or -9000) ............................. 114

Get Configuration File Block (9001 or -9001) ................................................ 115

Get General Module Status Data Block (9250) ............................................. 116

Set Port and Command Active Bits Block (9500) .......................................... 117

Get Port and Command Active Bits Block (9501).......................................... 118

Pass-through Formatted Block for Functions 6 and 16 with Word Data Block

119

Pass-through Formatted Block for Functions 6 and 16 with Float Data Block

120

Pass-through Formatted Block for Function 5 (9958).................................... 121

Pass-through Formatted Block for Function 15 (9959) ................................. 122

Pass-through Formatted Block for Function 23 (9961) ................................. 123

Pass-through Block for Function 99 (9970) ................................................... 124

Set Module Time Using Received Time Block (9972) ................................... 125

Pass Module Time to Processor Block (9973) .............................................. 126

Reset Status Block (9997) ............................................................................. 127

Warm-boot Control Block (9998) ................................................................... 127

Cold-boot Control Block (9999) ..................................................................... 128

Ethernet Port Connection .............................................................................. 129

Ethernet Cable Specifications ........................................................................ 129

Modbus Application Port Connection ............................................................ 130

RS-232 Wiring................................................................................................ 130

RS-422 Wiring................................................................................................ 133

RS-485 Wiring................................................................................................ 133

DB9 to RJ45 Adaptor (Cable 14) ................................................................... 134

8 Support, Service & Warranty

8.1

8.2

135

Contacting Technical Support ........................................................................ 135

Warranty Information ..................................................................................... 135

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Start Here

User Manual

1 Start Here

To get the most benefit from this User Manual, you should have the following skills:



Rockwell Automation ® RSLogix™ software: launch the program, configure ladder logic, and transfer the ladder logic to the processor



Microsoft Windows ® : install and launch programs, execute menu commands, navigate dialog boxes, and enter data



Hardware installation and wiring: install the module, and connect Modbus and

CompactLogix devices to a power source and to the MVI69L-MBS ’s application port(s)

1.1 System Requirements

The MVI69L-MBS requires the following minimum hardware and software components:



Rockwell Automation CompactLogix ® processor (firmware version 10 or higher), with compatible power supply and one free slot in the rack, for the MVI69L-MBS.

Important: The MVI69L-MBS has a power supply distance rating of 4 (L43 and L45 installations on first 4 slots of 1769 bus). It consumes 450 mA at 5 VDC.



The module requires 450 mA of available 5 VDC power



Rockwell Automation RSLogix 5000 programming software version 16 or higher



Rockwell Automation RSLinx ® communication software version 2.51 or higher



ProSoft Configuration Builder (PCB) (included)



ProSoft Discovery Service (PDS) (included in PCB)



Pentium ® II 450 MHz minimum. Pentium III 733 MHz (or better) recommended



Supported operating systems: o Microsoft Windows 10 o Microsoft Windows 7 Professional (32-or 64-bit) o Microsoft Windows XP Professional with Service Pack 1 or 2 o Microsoft Windows Vista o Microsoft Windows 2000 Professional with Service Pack 1, 2, or 3 o Microsoft Windows Server 2003



128 Mbytes of RAM minimum, 256 Mbytes of RAM recommended



100 Mbytes of free hard disk space (or more based on application requirements)

Note: The Hardware and Operating System requirements in this list are the minimum recommended to install and run software provided by ProSoft Technology ® . Other third party applications may have different minimum requirements. Refer to the documentation for any third party applications for system requirements.

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1.2 Deployment Checklist

Start Here

User Manual

Before you begin to configure the module, consider the following questions. Your answers will help you determine the scope of your project, and the configuration requirements for a successful deployment.



Are you creating a new application or integrating the module into an existing application?

Most applications can use the Sample Add-On Instruction or Sample Ladder Logic without any modification.



Which slot number in the chassis does the MVI69L-MBS occupy?

For communication to occur, you must enter the correct slot number in the sample program.



Are the RSLogix 5000 and RSLinx software installed?

RSLogix and RSLinx are required to communicate to the CompactLogix processor.



How many words of data do you need to transfer in your application (from

CompactLogix to Module / to CompactLogix from Module)?

1.3 Package Contents

The following components are included with your MVI69L-MBS, and are all required for installation and configuration.

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

Qty.

Part Name

MVI69L-MBS

Adapter Cable

Screw Terminal

Adapter

Part Number

MVI69L-MBS

Cable #14

1454-9F

Part Description

Modbus Serial Lite Communication Module

RJ45 to DB9 Male Adapter cable. For DB9 connection to module’s serial application port

DB9 female to 9-pin screw terminal. Used for RS422 or RS485 connections to Port 1 of the module

If any of these components are missing, please contact ProSoft Technology Technical

Support for replacement parts.

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Modbus Serial Lite Communication Module

1.4 Setting Jumpers

Start Here

User Manual

When the module is manufactured, the port selection jumpers are set to RS-232. To use

RS-422 or RS-485, you must set the jumpers to the correct position. The following diagram describes the jumper settings.

Note: Jumper pin placement on the circuit board may vary.

The Setup Jumper acts as "write protection" for the module’s firmware. In "write protected" mode, the Setup pins are not connected, and t he module’s firmware cannot be overwritten. The module is shipped with the Setup jumper OFF. If an update of the firmware is needed, apply the Setup jumper to both pins.

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Start Here

User Manual

The following illustration shows the MVI69L-MBS jumper configuration, with the Setup

Jumper OFF.

1.5 Installing the Module in the Rack

Make sure the processor and power supply are installed and configured before installing the MVI69L-MBS. Refer to the Rockwell Automation product documentation for installation instructions.

Warning: Please 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 even serious injury or death to personnel. Refer to the documentation for each device to be connected to verify that suitable safety procedures are in place before installing or servicing the device.

After you verify the jumper placements, insert the MVI69L-MBS into the rack. Use the same technique recommended by Rockwell Automation to remove and install

CompactLogix 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.

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Modbus Serial Lite Communication Module

Start Here

User Manual

1 Align the module using the upper and lower tongue-and-groove slots with the adjacent module and slide forward in the direction of the arrow.

2 Move the module back along the tongue-and-groove slots until the bus connectors on the MVI69 module and the adjacent module line up with each other.

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Modbus Serial Lite Communication Module

Start Here

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3 Push the module’s bus lever back slightly to clear the positioning tab and move it firmly to the left until it clicks. Ensure that it is locked firmly in place.

4 Close all DIN-rail latches.

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Modbus Serial Lite Communication Module

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5 Press the DIN-rail mounting area of the controller against the DIN-rail. The latches momentarily open and lock into place.

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2 Adding the Module to RSLogix

Adding the Module to RSLogix

User Manual

To add the MVI69L-MBS in RSLogix 5000, you must:

1 Create a new project in RSLogix 5000.

2 Add the module to the RSLogix 5000 project. There are two ways to do this: o o

You can use the Add-On Profile from ProSoft Technology. This is the preferred way, but requires RSLogix version 15 or later.

You can manually create the module using a generic 1769 profile, and then manually configure the module parameters. Use this method if you have RSLogix version 14 or earlier.

3 Create an Add-On Instruction file using ProSoft Configuration Builder (PCB) and export the Add-On Instruction to an RSLogix 5000 compatible file (.L5X file).

4 Import the Add-On Instruction (the .L5X file) into RSLogix 5000.

The .L5X file contains the Add-On Instruction, user-defined data types, controller tags and ladder logic required to configure the MVI69L-MBS.

2.1 Creating the Module in an RSLogix 5000 Project

In an RSLogix 5000 project, there are two ways you can add the MVI69L-MBS to the project.



You can use an Add-On Profile (AOP) from ProSoft Technology. The AOP contains all the configuration information needed to add the module to the project. This is the preferred way, but requires RSLogix version 15 or later. Refer to Creating a Module

in the Project Using an Add-On Profile (page 15).



If using an AOP is not an option, you can manually create and configure the module using a generic 1769 profile. Use this method if you have RSLogix version 14 or earlier. Refer to Creating a Module in the Project Using a Generic 1769 Module

Profile.

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Adding the Module to RSLogix

User Manual

2.1.1 Creating a Module in the Project Using an Add-On Profile

Installing an Add-On Profile

1 Download the AOP file (MVI69x_RevX.X_AOP.zip) from the product webpage (found at www.prosoft-technology.com

) and extract the files from the zip archive. Make sure you have shut down RSLogix 5000 and RSLinx before you install the Add-On Profile

(AOP).

2 Run the MPSetup.exe

file to start the Setup Wizard. Follow the Setup Wizard to install the AOP.

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Adding the Module to RSLogix

3 Continue to follow the steps in the wizard to complete the installation.

User Manual

4 Click F

INISH when complete . The AOP is now installed in RSLogix 5000. You do not need to reboot the PC.

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Adding the Module to RSLogix

User Manual

Using an Add-On Profile

1 In RSLogix 5000, expand the I/O C ONFIGURATION folder in the Project tree. Rightclick the appropriate communications bus, and then click N

ODULE

This opens the Select Module Type dialog box. In the Module Type Vendor Filters area, uncheck all boxes except the P RO S OFT T ECHNOLOGY box. A list of ProSoft

Technology modules appears in the dialog box.

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2 Select the MVI69L-MBS in the list and click C REATE :

Adding the Module to RSLogix

User Manual

3 A New Module dialog box opens. Edit the N

AME

and S

LOT

for the module and click

OK .

Note: This module uses a block transfer size of 240 only. Therefore, it uses an I/O T ABLE S IZE of 242/241 words.

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The MVI69L-MBS is now visible in the I/O Configuration tree.

Adding the Module to RSLogix

User Manual

2.1.2 Creating a Module in the Project Using a Generic 1769 Module Profile

This procedure is not required if you installed the ProSoft Technology Add-On Profile for this module.

1 Expand the I/O C

ONFIGURATION

folder in the Project tree. Right-click the appropriate communications bus and choose N EW M ODULE .

This opens the Select Module Type dialog box.

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Modbus Serial Lite Communication Module

Adding the Module to RSLogix

User Manual

2 In the Select Module Type dialog, select the 1769-MODULE and click on the

CREATE button.

3 Set the Module Properties values as follows:

Parameter

Name

Description

Comm Format

Slot

Input Assembly Instance

Input Size

Output Assembly Instance

Output Size

Configuration Assembly Instance

Configuration Size

101

242

100

241

102

Value

Enter a module identification string. Example: MVI69L_MBS

Enter a description for the module. Example: ProSoft communication module for Serial Modbus communications.

Select D ATA -INT

Enter the slot number in the rack where the MV69L-MBS module is installed.

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Adding the Module to RSLogix

User Manual

This module must be configured with a block transfer size of 240 words (input block size = 242 words, output block size = 241 words).

4 On the Connection tab, set the R

EQUESTED

ACKET

NTERVAL

value for your project and click OK . A value of 10.0

ms or more is recommended.

The MVI69L-MBS is now visible in the I/O Configuration tree.

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2.2 Installing ProSoft Configuration Builder

Adding the Module to RSLogix

User Manual

Use the ProSoft Configuration Builder (PCB) software to configure the module. You can find the latest version of the ProSoft Configuration Builder (PCB) on our web site: www.prosoft-technology.com

. The installation filename contains the PCB version number. For example, PCB_4.3.4.5.0238.

EXE

Installing PCB from the ProSoft website:

1 Open a browser window and navigate to www.prosoft-technology.com

2 Perform a search for 'pcb' in the Search bar. Click on the ProSoft Configuration

Builder search result.

3 On the PCB page, click the download link for ProSoft Configuration Builder, and save the file to your Windows desktop.

4 After the download completes, double-click the file to install. If you are using

Windows 7, right-click the PCB installation file and then choose R UN AS

A DMINISTRATOR . Follow the instructions that appear on the screen.

5 If you want to find additional software specific to your MVI69L-MBS, enter the model number into the ProSoft website search box and press the E NTER key.

2.3 Generating the AOI (.L5X File) in ProSoft Configuration Builder

The following sections describe the steps required to set up a new configuration project in ProSoft Configuration Builder (PCB), and to export the .L5X file for the project.

2.3.1 Setting Up the Project in PCB

To begin, start P RO S OFT C ONFIGURATION B UILDER (PCB).

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Adding the Module to RSLogix

User Manual

The PCB window consists of a tree view on the left, and an information pane and a configuration pane on the right side of the window. The tree view consists of folders for

Default Project and Default Location , with a Default Module in the Default Location folder. The following illustration shows the PCB window with a new project.

Your first task is to add the MVI69L-MBS to the project.

1 In the Tree view, right-click D EFAULT M ODULE , and then click C HOOSE M ODULE T YPE .

This opens the Choose Module Type dialog box.

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Adding the Module to RSLogix

User Manual

2 In the Product Line Filter area of the dialog box, click MVI69 . In the Select Module

Type dropdown list, click MVI69L-MBS , and then click OK to save your settings and return to the ProSoft Configuration Builder window. The MVI69L-MBS icon is now visible in the tree view.

2.3.2 Creating and Exporting the .L5X File

There are two parameters in the PCB configuration that affect the format of the .L5X file that is exported. Before exporting the .L5X file to the PC/Laptop, check the Block

Transfer Size and Slot Number parameters.

1 Expand the MVI69L-MBS icon by clicking the [+] symbol beside it. Similarly, expand the icon. Double-click the icon to open the Edit - Module dialog box.

2 Edit the Slot Number indicating where the module is placed in the 1769 bus.

3 Click OK to close the Edit – Module dialog box. The .L5X file is now ready to export to the PC/Laptop.

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4 Right-click the MVI69L-MBS icon in the project tree and then click E XPORT AOI F ILE .

5 Save the .L5X file to the PC/Laptop in an easily found location, such as Windows

Desktop.

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2.4 Creating a New RSLogix 5000 Project

1 Click the F ILE menu and then choose N EW .

Adding the Module to RSLogix

User Manual

2 Select your CompactLogix controller model.

3 Select R EVISION 16 or newer.

4 Enter a name for your controller, such as My_Controller .

5 Select your CompactLogix chassis type.

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2.5 Importing the Add-On Instruction

Adding the Module to RSLogix

User Manual

1 Open the application in RSLogix 5000.

2 Expand the T

ASKS folder, and expand the M

AIN

ASK

folder.

3 Expand the M AIN P ROGRAM folder. The M AIN R OUTINE contains rungs of logic. The very last rung in this routine is blank. This is where you can import the Add-On

Instruction.

Note: You can place the Add-On Instruction in a different routine than the MainRoutine. Make sure to add a rung with a jump instruction (JSR) in the MainRoutine to jump to the routine containing the Add-On

Instruction.

4 Right-click an empty rung in the routine and choose I MPORT R UNGS .

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5 Select the .L5X

file that you exported from PCB.

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This opens the Import Configuration dialog box. Click T

AGS

under M

AIN

OUTINE

to display the controller tags in the Add-On Instruction.

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Note: If you are using RSLogix version 16 or earlier, the Import Configuration dialog box does not contain the Import Content tree.

6 If the module is not located in the default slot (or is in a remote rack), edit the connection input and output variables that define the path to the module in the F INAL

N AME column ( N AME column for RSLogix version 16 or less). For example, if your module is located in slot 3, change Local:1:I in the F INAL N AME column to Local:3:I.

Do the same for Local:1:O .

Note: If your module is located in Slot 1 of the local rack, this step is not required.

7 Click OK to confirm the import.

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When the import is complete, the new Add-On Instruction rung is present.

User Manual

The procedure also imports new user-defined data types, data objects and the Add-

On instruction to be used in the project with the MVI69L-MBS.

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2.6 Adding Multiple Modules in the Rack (Optional)

Adding the Module to RSLogix

User Manual

Important: This procedure is for multiple MVI69L-MBSs running in the same CompactLogix rack

You can add additional modules of the same type to the rack.

1 Add a new MVI69L-MBS to the ProSoft Configuration Builder (PCB) project.

2 Export the module configuration as an L5X file.

3 Add a new MVI69L-MBS to the RSLogix 5000 project.

4 Import the .L5X file into RSLogix 5000 for the new module as an Add-On Instruction.

2.6.1 Adding an Additional Module in PCB

1 Start ProSoft Configuration Builder.

2 Right click D EFAULT L OCATION (which you can rename) and choose A DD M ODULE .

3 Right-click N

ODULE

and choose C

HOOSE

ODULE

YPE

4 In the Choose Module Type dialog box, select MVI69L in the P RODUCT L INE F ILTER area, and then select MVI69L-MBS as the M ODULE T YPE . Click OK .

5 Select the MVI69L-MBS in the tree and repeat the above steps to add a second (or more) module in the PCB project.

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Note: You must give each MVI69L-MBS a unique name. The default name on a duplicate module appends a number to the end such as MVI69L-MBS_000, MVI69L-MBS_001, etc.

6 You can rename the module by right clicking the module and choosing Rename .

Configure the module parameters. See Module Configuration Parameters (page 43)

and then export the AOI .L5X file for the new module (right-click the module and choose E

XPORT

AOI F

ILE

. See Creating and Exporting the .L5X File.

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2.6.2 Adding Additional MVI69L-MBS Modules in RSLogix 5000

You can place multiple MVI69L-MBS modules in the same rack provided it does not exceed the power distance rating of the CompactLogix rack, see System Requirements

(page 7). Adding an additional module to the rack is similar to installing a new module;

however, the name of the module must be unique.

1 Start RSLogix 5000 and open the project.

2 In RSLogix 5000, locate the I/O C ONFIGURATION folder. Right click C OMPACT B US

L OCAL and choose N EW M ODULE .

3 In the Select Module Type dialog box, select the MVI69L-MBS. o o

If you are using an Add-On Profile (AOP), this adds the MVI69L-MBS and configures the relevant parameters. You must be using RSLogix version 15 or later to to use an AOP.

If using an AOP is not an option, select G ENERIC 1769 M ODULE and click C REATE .

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4 The New Module dialog box appears. Enter a unique name for the new module, and confirm the slot number of the new module.

5 Click OK . The new module is now visible.

6 You must also import the Add-On Instruction (AOI) for the new module. In the

Controller Organizer pane, double-click M AIN R OUTINE to open the ladder for the routine.

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7 Right-click an empty rung in the routine, and then choose I MPORT R UNGS

…

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8 Select the .L5X file you created and exported for the new module, and click I MPORT .

Recall that the new .L5X file has a unique filename that is specific to the new module.

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9 This opens the I MPORT C ONFIGURATION dialog box. Click T AGS to show the controller tags in the AOI. You must edit the F INAL N AME column of the tags for the second module to make them unique.

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10 Associate the I/O connection variables to the correct module in the corresponding slot number. The default values are Local:1:I and Local:1:O. You must edit these values if the card is placed in a slot location other than slot 1 (Local:1:x means the card is located in slot 1). Since the second card is placed in slot 2, change the F INAL

N AME to Local:2:I and Local:2:O. Also, you can append a ‘_2’ at the end of the F INAL

N AME of ‘AOI69_MBS’ and ‘MBS’ arrays as shown below.

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11 Click OK .

Adding the Module to RSLogix

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The setup procedure is now complete. Save the project. It is ready to download to the

CompactLogix processor.

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3 Configuring the MVI69L-MBS Using PCB

ProSoft Configuration Builder (PCB) provides a quick and easy way to manage module configuration files customized to meet your application needs.

You build and edit the mod ule’s configuration in ProSoft Configuration Builder. You use

PCB to download the configuration file to the CompactLogix processor, where it is stored in the MBS.CONFIG controller tag generated by the previously exported AOI. See

Creating and Exporting the .L5X File. When the MVI69L-MBS boots up, it requests the processor to send the configuration over the backplane in special Configuration Blocks.

See Adding the Module to RSLogix (page 14) for the procedures to create a new PCB

project and export a .L5X file for the processor. This chapter describes the module configuration parameters in detail, as well as how to download the configuration to the processor using PCB.

3.1 Basic PCB Functions

3.1.1 Creating a New PCB Project and Exporting an .L5X File

Please see the chapter Adding the Module to RSLogix (page 14).

3.1.2 Renaming PCB Objects

You can rename objects such as the Default Project and Default Location folders in the tree view. You can also rename the Module icon to customize the project.

1 Right-click the object you want to rename and then choose R ENAME .

2 Type the new name for the object and press Enter .

3.1.3 Editing Configuraiton Parameters

1 Click the [+] sign next to the module icon to expand module information.

2 Click the [+] sign next to any icon to view module information and configuration options.

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3 Double-click any icon to open an Edit dialog box.

To edit a parameter, select the parameter in the left pane and make your changes in the right pane.

Note: Depending on the parameter, you must enter text, or a valid number, or select from a list of options.

4 Click OK to save your changes.

5 Double-click any icon to open an Edit dialog box with a table. Use this dialog box to build and edit Modbus Master commands.

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6 To add a row to the table, click A DD R OW .

Configuring the MVI69L-MBS Using PCB

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7 To edit the row, click E DIT R OW . This opens an Edit dialog box.

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3.1.4 Printing a Configuration File

Configuring the MVI69L-MBS Using PCB

User Manual

1 In the main PCB window, right-click the MVI69L-MBS icon and then choose V IEW

ONFIGURATION

2 In the View Configuration dialog box, click the F ILE menu and click P RINT .

3 In the Print dialog box, choose the printer to use from the drop-down list, select the printing options, and click OK .

3.2 Module Configuration Parameters

3.2.1 Module Parameters

This section contains general module configuration parameters. The module uses 240 words of read data (user input data), fixed at module memory 0 to 239. The module uses

240 words of write data (user output data), fixed at module memory 240 to 479.

In the ProSoft Configuration Builder (PCB) tree view, double-click the M ODULE icon.

Parameter

Module Name

Backplane Fail Count

Error/Status Block

Pointer

Initialize Input Image

Value

ASCII characters

(max. 38)

Description

Assigns a name to the module that can be viewed using the configuration/debug port. Use this parameter to identify the module and the configuration file.

0 to 65535 Specifies the number of consecutive backplane transfer failures that can occur before communications are halted.

-1 to 419 Starting register location in the module’s database for the error/status table. If a value of -1 is entered, the error/status data is not placed in the database. All other valid values determine the starting location of the data. This data must be placed in the read data range of module memory.

This data area includes the module version information and all server error/status data. Refer to MBS.STATUS for more information.

Yes or No This parameter determines if the input image data and the m odule’s Read Register Data values are initialized with

Read Register Data values from the processor. If you set the parameter to No, the Read Register Data values in the module are set to 0 upon initialization. If you set the parameter to Yes, the data is initialized with Read Register

Data values from the processor. Using this option requires associated ladder logic to pass the data from the processor to the module.

1 to x Specifies the slot in the CompactLogix rack for the module.

Slot Number

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3.2.2 MBS Port 1 Parameters

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User Manual

In the ProSoft Configuration Builder tree view, double-click the M ODBUS P ORT 1 icon.

Configuration Parameters Common to Master and Slave

Parameter

Start Active

Type

Protocol

Baud Rate

Parity

Data Bits

Stop Bits

RTS On

RTS Off

Use CTS Line

Enron-Daniels

Value Description

Yes or No

Master, Slave, or Slave with

Pass-Through

Specifies whether or not the port and commands are active upon module boot-up.

This parameter specifies which device type the port emulates.

See Slave Mode (page 59) for more information on Slave

Pass-Through options.

RTU or ASCII Specifies the Modbus protocol for the port.

Multiple options Specifies the baud rate for the port.

None

Odd

Even

7 or 8

1 or 2

0 to 65535 milliseconds

Yes or No

Specifies the type of parity error checking to use. All devices communicating through this port must use the same parity setting.

Sets the number of data bits for each word used by the protocol. All devices communicating through this port must use the same number of data bits.

Sets the number of stop bits that signal the end of a character in the data stream. For most applications, use one stop bit. For slower devices that require more time to re-synchronize, use two stop bits. All devices communicating through this port must use the same number of stop bits.

Sets the number of milliseconds to delay after Ready To Send

(RTS) is asserted before data is transmitted.

Yes or No

Sets the number of milliseconds to delay after the last byte of data is sent before the RTS modem signal is set low.

Specifies if the Clear To Send (CTS) modem control line is to be used or not. If you set the parameter to N

, the CTS line is not monitored. If you set the parameter to Y ES , the CTS line is monitored and must be high before the module sends data.

Normally, this parameter is required when half-duplex modems are used for communication (2-wire). This procedure is commonly referred to as hardware handshaking .

Specifies how the Slave driver responds to Function Code 3, 6, and 16 commands (read and write Holding Registers) from a remote Master when it is moving 32-bit floating-point data.

Note: Most applications using floating-point data do not need this parameter enabled.

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Enron-Daniels

Float Start

Enron-Daniels

Float Offset

0 to 478

Configuring the MVI69L-MBS Using PCB

User Manual

If the remote Master expects to receive or sends one complete

32-bit floating-point value for each count of one (1), then set this parameter to Y

. When set to Y

, the Slave driver returns values from two consecutive 16-bit internal memory registers (32 total bits) for each count in the read command, or receive 32-bits per count from the Master for write commands.

Example: Count = 10 , Slave driver sends 20 16-bit registers for

10 total 32-bit floating-point values.

If, however, the remote Master sends a count of two (2) for each 32-bit floating-point value it expects to receive or send, or, if you do not plan to use floating-point data in your application, then set this parameter to N O , which is the default setting.

You also need to set the Float Start and Float Offset parameters to appropriate values whenever the Float Flag parameter is set to Y ES . See Floating-Point Support (page

102) for more information.

Defines the first register of floating-point data. All requests with register values greater-than or equal to this value is considered floating-point data requests. This parameter is only used if the

Float Flag is enabled. For example, if you enter a value of 200, all requests for registers 200 and above are considered as floating-point data.

Defines the start register for floating-point data in the internal database. This parameter is used only if the Float Flag is enabled. For example, if you set the Float Offset value to 100 and the float start parameter to 200, data requests for register

200 use the internal Modbus register 100.

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Additional Configuration Parameters as Master

The Type parameter must be M ASTER to configure these parameters. See Configuration

Parameters Common to Master and Slave (page 44).

Parameter

Response

Timeout

Retry Count

Minimum

Command Delay

Error Delay

Counter

Inter-character

Timeout

Command Error

Offset

Value

0 to 65535 milliseconds

0 to 10

0 to 32767 milliseconds

0 to 60000

0 to 65535 milliseconds

-1 to 239

Description

Specifies the command response timeout period in 1 millisecond increments. This is the time that a port configured as a Master waits for a response from the addressed slave before re-transmitting the command (Retries) or skipping to the next command in the Command List. The value to specify depends on the communication network used and the expected response time (plus or minus) of the slowest device on the network.

Specifies the number of times a command is retried if it fails.

Specifies the number of milliseconds to wait between receiving the end of a slave's response to the most recently transmitted command and the issuance of the next command. You can use this parameter to place a delay after each command to avoid sending commands on the network faster than the slaves can receive them. This parameter does not affect retries of a command, as retries are issued when a command failure is recognized.

Specifies the number of poll attempts to be skipped before trying to re-establish communications with a slave that has failed to respond to a command within the time limit set by the

Response Timeout parameter. After the slave fails to respond, the master skips sending commands that should have been sent to the slave until the number of skipped commands matches the value entered in this parameter. This creates a sort of slow poll mode for slaves that are experiencing communication problems.

Specifies a time delay in milliseconds to be added to the 3.5 character time delay used by the module to recognize the end of a message. Certain applications may require validation of

Modbus messages with more than 3.5 character time between consecutive bytes (example: modem applications). A value of

0 causes the default end of message delay to be used

Sets the address in the module’s database where the command error data is placed. If the value is set to -1, the data is not transferred to the database. The valid range of values for this parameter is -1 to 4899. For example, if this parameter is configured for 230, the command errors are copied to the database as follows:

230: error code for command 0

231: error code for command 1

…

An error code of 0 means that the command was successfully sent (no error).

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Additional Configuration Parameters as Slave

The Type parameter must be S LAVE or P ASS T HRU S LAVE to configure these parameters.

See Configuration Parameters Common to Master and Slave (page 44).

Parameter

Minimum

Response Delay

Internal Slave ID

Bit Input Offset

Holding Register

Offset

Value

0 to 65535 milliseconds

1 to 247

0 to 479

Word Input Offset 240 to 479

Output Offset

0 to 479

Description

Sets the number of milliseconds to wait before responding to a command received on the port from a remote Master. This delay is sometimes required to accommodate slower Master devices.

Defines the Slave Node Address for the internal database. All requests received by the port with this address are processed by the module. Verify that each device has a unique address on a network.

Specifies the offset address into the internal Modbus database for network requests for Modbus function 2 commands. For example, if you set the value to 150, an address request of 0 returns the value at register 150 in the database.

Specifies the offset address into the internal Modbus database for network requests for Modbus function 4 commands. For example, if you set the value to 350, an address request of 0 returns the value at register 350 in the database.

Specifies the offset address into the internal Modbus database for network requests for Modbus function 1, 5 or 15 commands.

For example, if you set the value to 100, an address request of 0 corresponds to register 100 in the database.

Specifies the offset address in the internal Modbus database for network requests for Modbus function 3, 6, or 16 commands.

For example, if you set the value to 250, a request for address 0 corresponds to the register 250 in the database.

Note: In Pass-Through mode, this range is limited to 0 to 240.

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3.2.3 Modbus Port 1 Commands

Configuring the MVI69L-MBS Using PCB

User Manual

This section defines the master command list specifications for a Master port. In the

ProSoft Configuration Builder tree view, double-click the M

ODBUS

ORT

1 C

OMMANDS icon.

In order to interface the MVI69L-MBS with Modbus slave devices, you must create a command list. The commands in the list specify the slave device to be addressed, the function to be performed (read or write), the data area in the device to interface with and the registers in the internal database to be associated with the device data.

The Master command list supports up to 30 commands. The command list is processed from top (Command #0) to bottom.

Read commands are executed without condition. You can set write commands to execute only if the data in the write command changes (Conditional Enable). If the register data values in the command have not changed since the command was last issued, the command is not executed. You can use this feature to optimize network performance.

The MBS Modbus Master (and Slave) communication drivers support several data read and write commands. When a command is configured, the type of data (bit, 16-bit integer, 32-bit float, etc), and the level of Modbus support in the slave equipment needs to be considered. For information on floating-point support, please see Floating-Point

Support (page 102).

Parameter

Enable

Value

0 to 4

Description

This field defines whether the command is to be executed and under what conditions.

Disabled (0) = The command is disabled and is not executed in the normal polling sequence.

Continuous (1) = The command is executed each scan of the command list if the Poll Interval (see below) is set to zero. If the Poll

Interval is set to a nonzero value, the command is executed when the interval timer expires.

Conditional (2) = For write commands only. The command executes only if the internal data associated with the command changes.

Bit/Word Override upon Error (3) = For read commands only. If a command error occurs, the module overrides the associated database area with the Override Value Upon Error parameter value.

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Internal

Address

Poll Interval

Count

Swap Code

0 to 479

(word-level) or

0 to 7679 (bitlevel)

0 to 65535

(1/10 second)

1 to 125

(words) or

1 to 800

(coils)

Float Override upon Error (4) = For read commands only. If a command error occurs, the module overrides the associated database area (2x word count) with the Override Value Upon Error parameter value.

Speci fies the module’s internal database register to be associated with the command.

If the command is a read function, the data read from the slave device is stored beginning at the module’s internal database register value entered in this field. This register value must be within the fixed Read

Data area of the module’s memory 0 to 239 (0 to 3839 bit-level).

If the command is a write function, the data to be written to the slave device is sourced beginning from the module’s internal database register specified. This register value must be within the fixed Write

Data area of the module’s memory 240 to 479 (3840 to 7679 bit-level).

Note: When using a bit level command, you must define this field at the bit level. For example, when using function codes 1 or 2 for a Read command, you must have a enter of 160 to place the data in the

MBS.DATA.ReadData[10] controller tag in RSLogix 5000. Think of it as the 160th bit of MBS internal memory (MBS Internal register 10 * 16 bits per register = 160). Use this formula for function codes 5 or 15 for writing bits also.

Specifies the minimum interval between executions of continuous commands ( Enable code = 1).

Example: The parameter is entered in 1/10th of a second. Therefore, if a value of 100 is entered, the command executes no more frequently than every 10 seconds. When the command reaches the top of the command queue and 10 seconds has not elapsed, it is skipped until the poll interval has expired.

Specifies the number of registers or digital points to be associated with the command. Modbus Function Codes 5 and 6 ignore this field as they only apply to a single data point.

For Function Codes 1, 2 and 15, this parameter sets the number of single bit digital points (inputs or coils) to be associated with the command.

For Function Codes 3, 4 and 16, this parameter sets the number of 16bit registers to be associated with the command.

0,1,2,3

Node Address 1 to 255

(0 = broadcast)

Defines if the data received from the Modbus slave is to be ordered differently than received from the slave device. This parameter is helpful when dealing with floating-point or other multi-register values, as there is no standard method of storage of these data types in slave devices. You can set this parameter to order the register data received in an order useful by other applications.

No Change (0)= No change is made in the byte ordering (ABCD =

ABCD)

Word Swap (1)= The words are swapped (ABCD= CDAB)

Word and Byte Swap (2) = The words are swapped, then the bytes in each word are swapped (ABCD=DCBA)

Byte Swap (3) = The bytes in each word are swapped (ABCD=BADC)

Note: Each pair of characters is a byte. Ex: AB and CD. Two pairs of characters is 16-bit register Ex: ABCD.

Specifies the Modbus slave node address on the network to be considered. Most Modbus devices only accept an address in the range of 1 to 247. If set to zero, the command is a broadcast message on the network. The Modbus protocol permits broadcast commands for write operations. Do not use this node address for read operations.

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Modbus

Function

MB Address in

Device

0 to 65535

Override

Value Upon

Error

Comment

1,2,3,4,5,6,15

,16

Configuring the MVI69L-MBS Using PCB

User Manual

Specifies the Modbus function to be executed.

1 – Read Coil Status (0xxxx)

– Read Input Status (1xxxx)

– Read Holding Registers (4xxxx)

– Read Input Registers (3xxxx)

5 – Force (Write Single) Coil (0xxxx)

– Force (Write Single) Holding Register (4xxxx)

– Preset (Write) Multiple Coils (0xxxx)

– Preset (Write) Multiple Registers (4xxxx)

Specifies the register or digital point address offset within the Modbus slave device. The MBS Master reads or writes from/to this address within the slave.

Refer to the documentation of each Modbus slave device for their register and digital point address assignments.

Note: The value entered here does not need to include the "Modbus

Prefix" addressing scheme. Also, this value is an offset of the zerobased Modbus addressing scheme.

Example: Using a Modbus Function Code 3 to read from address

40010 in the s lave, a value of ‘9’ would be entered in this parameter.

The firmware (internally) adds a ‘40001’ offset to the value entered.

This is the same for all Modbus addresses (0x, 1x, 3x, 4x).

This parameter is only applicable for Enable Codes 3 (Bit/Word

Override) or 4 (Float Override).

If an error occurs associated to a read command the module automatically populates the associated database area with this override value.

32-character text field.

3.2.4 Ethernet 1

This section defines the permanent IP address, Subnet Mask, and Gateway of the module.

In the ProSoft Configuration Builder tree view, double-click the E THERNET 1 icon.

Parameter

IP Address

Netmask

Gateway

Description

Unique IP address assigned to the module

Subnet mask of module

Gateway (if used)

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Configuring the MVI69L-MBS Using PCB

User Manual

3.3 Downloading the Configuration File to the Processor

1 In the ProSoft Configuration Builder tree view, right-click the module icon and choose

OWNLOAD FROM

EVICE

2 In the Download Configuration File dialog box, click RSW HO .

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3 Browse to, and then highlight the CompactLogix processor and click OK .

User Manual

4 Notice the CIPConnect path has been updated in the Download Configuration File dialog box. Click T EST C ONNECTION to verify the path is active and can successfully connect to the processor.

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5 When ready, click D OWNLOAD to download the configuration file to the processor.

Following the download process, the module reboots.

6 After rebooting, the ladder logic sends the configuration data from the processor to the module. When that is complete, the module starts Modbus communications.

3.4 Uploading the Configuration File from the Processor

1 In the ProSoft Configuration Builder tree view, right-click the MVI69L-MBS icon and choose U PLOAD FROM D EVICE TO PC .

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2 In the Upload Configuration File dialog box, the CIPConnect path should already be constructed if you have previously downloaded the configuration file from the same

PC. If not, click RSW HO , browse to, and then select the CompactLogix Processor, and click OK .

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3 Click T EST C ONNECTION to verify the path is active and can successfully connect to the processor.

4 When ready, click U PLOAD . When upload is complete, click C LOSE .

5 ProSoft Configuration Builder now displays the uploaded configuration file.

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MVI69L-MBS Backplane Data Exchange

User Manual

4 MVI69L-MBS Backplane Data Exchange

4.1 General Concepts of the MVI69L-MBS Data Transfer

The MVI69L-MBS uses ladder logic to communicate with the CompactLogix 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 MVI69L-MBS. This is the order of operations on power-up:

1 The module begins the following logical functions: o o o

Initialize hardware components

Initialize CompactLogix backplane driver

Test and clear all RAM

2 Read configuration from the CompactLogix 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.

4.2 Backplane Data Transfer

The MVI69L-MBS communicates directly over the CompactLogix backplane. Data is paged between the module and the CompactLogix processor across the backplane using the module's input and output images. The update frequency of the images is determined by the scheduled scan rate that you define for the module and the communication load on the module. Typical updates are in the range of 1 to 10 milliseconds per block of information.

This bi-directional data transfer is accomplished by the module filling in data in the module's input image to send to the processor. Data in the input image is placed in the

Controller Tags in the processor by the ladder logic. The input image for the module is

242 words. This data area permits fast throughput of data between the module and the processor.

The processor inserts data to the module's output image to transfer to the module. The module's program extracts the data and places it in the module's internal database. The output image for the module is 241 words.

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MVI69L-MBS Backplane Data Exchange

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The following illustration shows the data transfer method used to move data between the

CompactLogix processor, the MVI69L-MBS and the Modbus Network.

All data transferred between the module and the processor over the backplane is through the input and output images. Ladder logic in the CompactLogix processor interfaces the input and output image data with data defined in the Controller Tags. All data used by the module is stored in its internal database. This database is defined as virtual MBS data tables with addresses from 0 to 239 each.

4.3 Normal Data Transfer

Normal data transfer includes the paging of the user data found in the module’s internal database and the status data. These data are transferred through read (input image) and write (output image) blocks. The following topics describe the structure and function of each block.

4.3.1 Write Block: Request from the Processor to the Module

These blocks of data transfer information from the processor to the module. The structure of the output image used to transfer this data is shown below:

Offset

1 to 240

Description

Write Block ID

Write Data

Length (words)

240

The Write Block ID is an index value that determines the location in the module’s database where the data is placed.

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4.3.2 Read Block: Response from the Module to the Processor

These blocks of data transfer information from the module to the processor. The structure of the input image used to transfer this data is shown below:

Offset

2 to 241

Description

Read Block ID

Write Block ID

Read Data

Length (words)

240

4.3.3 Read and Write Block Transfer Sequences

There are 240 words of data transferred per block along the backplane between the module and the processor.

The Write Block ID associated with the block requests data from the processor. Under normal program operation, the module sequentially sends read blocks and requests write blocks. The application uses one read and one write block, the sequence is as follows:

R1W1



R1W1



R1W1



R1W1



This sequence continues until interrupted by other write block numbers sent by the controller or by a command request from a node on the Modbus network or operator control through the module’s Ethernet port.

The backplane parameters are configured as follows:

Database address 0 to 239 is continuously transferred from the module to the processor.

Database address 240 to 479 is continuously transferred from the processor to the module.

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4.4 Data Flow Between the Module and Processor

MVI69L-MBS Backplane Data Exchange

User Manual

The following topics describe the flow of data between the two pieces of hardware

(CompactLogix processor and MVI69L-MBS) and other nodes on the Modbus network.

You can configure each port on the module to emulate a Modbus Master device or a

Modbus Slave device.

4.4.1 Slave Mode

In Slave Driver mode, the MVI69L-MBS responds to read and write commands issued by a master on the Modbus network. The following diagram shows the data flow for normal Slave mode.

Step

Description

Any time the module restarts (boots or reboots), the Modbus slave port driver receives configuration information from the MBS controller tags. This information configures the application ports and defines slave node characteristics. The configuration information may also contain instructions to offset data stored in the database to addresses different from addresses requested in the received messages.

A Modbus Master device, such as a Modicon PLC or an HMI application, issues a read or write command to the module’s node address. The port driver qualifies the message before accepting it into the module. Rejected commands cause an Exception Response.

After the module accepts the command, the data is immediately transferred to or from the module’s internal database. On a read command, the data is read from of the database and a response message is built. On a write command, the data is written directly into the database and a response message is built.

After Steps 2 and 3 have been completed, either a normal response message or an

Exception Response message is sent to the Master.

Counters are available in the Status Block to permit the ladder logic program to determine the level of activity of the Slave driver.

In Slave Pass-Through mode, write commands from the Master are handled differently than they are in Normal mode. In Slave Pass-Through mode, all write requests are passed directly to the processor and data is not written directly into the module’s database.

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This mode is especially useful when both a Modbus Master and the module’s processor logic need to be able to read and write values to the same internal database addresses.

Note: In Slave Pass-Through mode, the Read Data range is no longer used. The Write Data range now occupies database address 0 to 239.

The following diagram shows the data flow for a slave port with pass-through enabled:

Step

Description

Same as normal mode.

Same as normal mode. a. In Pass-Through mode, if the Slave driver receives a read request, it looks for the data in module’s internal database, just as it would in Normal mode. b. The data needed to respond to the read command is retrieved directly from the internal database and returned to the Slave driver so it can build a response message. c. In Pass-Through mode, if the Slave driver receives a write request, it does not send the data directly to the module’s internal database. It puts the data to be written into a special Input Image with a special Block ID code to identify it as a Pass-Through Write

Block and substitutes this special block in place of the next regular Read Data Block. The special block is processed by the ladder logic and the data to be written is placed into the

WriteData controller tag array at an address that corresponds to the Modbus Address received in the write command. d. During normal backplane communications, the data from the WriteData array, including the data updated by the Pass-Through Write Block, is sent to the module ’s internal database. This gives the ladder logic the opportunity to also change the values stored in these addresses, if need be, before they are written to the database.

Note: The ReadData array is not used in Pass-Through mode.

Same as normal mode.

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4.4.2 Master Mode

MVI69L-MBS Backplane Data Exchange

User Manual

In Master mode, the MVI69L-MBS issues read or write commands to slave devices on the Modbus network. These commands are user-configured in PCB; refer to Modbus

Port 1 Commands (page 48). This list is transferred to the module when the module

receives its configuration from the processor.

The commands can also be issued directly from the CompactLogix processor (Special

Command Blocks).

Command status is returned to the processor for each individual command in the command list. The location of this command status list in the module’s internal database is user-defined. The following flow chart and associated table describe the flow of command data into and out of the module.

Step

Description

Upon module boot-up, the Master driver obtains configuration data from the MBS controller tags. The configuration data retrieved includes port configuration and the

Master Command List.

Special Commands can be issued directly from the CompactLogix processor using Event

Commands and Command Control. These command values are used by the Master driver to determine the types and order of commands to send to slaves on the network.

After configuration, the Master driver begins transmitting read and/or write commands to slave nodes on the network. If the Master driver is writing data to a slave, the data for the write command is retrieved from the module’s internal database.

Once the specified slave has successfully processed the command, it returns a response message to the Master driver for processing.

Data received from a slave in response to a read command is stored in the module’s internal database.

Status is returned to the processor for each command in the Master Command List.

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Important: Take care when constructing each command in the list to ensure predictable operation of the module. If two commands write to the same internal database address of the module, the results are invalid.

All commands containing invalid data are ignored by the module.

Master Command List

For a port to function in Master Mode, its Master Command List must be defined in

Prosoft Configuration Builder; refer to Modbus Port 1 Commands (page 48). This list

contains up to 30 individual entries, with each entry containing the information required to construct a valid command. A valid command includes the following items:



Command enable mode: (0) disabled, (1) continuous or (2) conditional



Source or destination database address: The module database address where data is written or read.



Count: The number of words or bits to be transferred – up to 125 words for Function

Codes 3, 4, or 16, and up to 2000 bits for Function Codes 1, 2, or 15.

Note: 125 words is the maximum count allowed by the Modbus protocol. Some field devices may support less than the full 125 words. Check with the device manufacturer for the maximum count supported by the particular slave device.



Slave node address



Modbus Function Code: This is the type of command that is issued.



Source or destination address in the slave device

Command Error Codes

As the list is read in from the processor and as the commands are processed, an error value is maintained in the module for each command. The definition for these command

error codes is listed in Communication Error Codes (page 84). You can view the

command error codes through the Ethernet diagnostics port; refer to Diagnostics and

Troubleshooting (page 72 ). They can also be transferred from the module’s database to

the processor.

To transfer the Command Error List to the processor, set the Command Error Offset parameter in the port configuration to a module database address that is in the module’s

Read Data area; refer to Additional Configuration Parameters as Master (page 46).

Note: The Command Error List must be placed in the Read Data area of the database, so it can be transferred to the processor in the input image.

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5 Using Controller Tags

Using Controller Tags

User Manual

Controller tags are a feature of the RSLogix software and are part of the MVI69L-MBS

Add-On Instruction. Refer to the section Adding the Module to RSLogix (page 14) for

information on importing the Add-On Instruction into RSLogix.

5.1 Controller Tags

Data related to the MVI69L-MBS is stored in the ladder logic in variables called controller tags. You use controller tags to manage communication between the MVI69L-MBS and the CompactLogix processor:



View the read and write data being transferred between the module and the processor.



View status data for the module.



Set up and trigger special functions.



Initiate module restarts (Warm Boot or Cold Boot).

Individual controller tags can be grouped into collections of controller tags called controller tag structures. A controller tag structure can contain any combination of:



Individual controller tags



Controller tag arrays



Lower-level controller tag structures

The controller tags are included in the MVI69L-MBS Add-On Instruction ladder logic.

After you import the Add-On Instruction, you can find the controller tags in the Controller

Tags subfolder, located in the Controller folder in the Controller Organizer pane of the main RSLogix 5000 window. This controller tag structure is arranged as a tree structure.

Individual controller tags are found at the lowest level of the tree structure. Each individual controller tag is defined to hold data of a specific type, such as integer or floating-point data.

The Add-On Instruction also includes user-defined data types (UDTs). UDTs are collections of data types and declares the data types for the controller tag structures.

The MVI69L-MBS 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 Add-On Instruction works without needing any modification.

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5.1.1 MVI69L-MBS Controller Tags

Using Controller Tags

User Manual

The main MVI69L-MBS controller tag structure, MBS , is broken down into five lowerlevel controller tag structures.

The five lower-level controller tag structures contain other controller tags and controller tag structures. Click the [+] sign next to any controller tag structure to expand it and view the next level in the structure.

For example, if you expand the MBS.DATA

controller tag structure, you see that it contains two controller tag arrays, MBS.DATA.ReadData

and MBS.DATA.WriteData

, which are 240-element integer arrays.

The controller tags in the Add-On Instruction are commented in the D

ESCRIPTION column.

Notice that the D ATA T YPE column displays the data types used to declare each controller tag, controller tag array or controller tag structure. Individual controller tags are declared with basic data types, such as INT and BOOL. Controller tag arrays are declared with arrays of basic data types. Controller tag structures are declared with userdefined data types (UDTs).

5.2 User-Defined Data Types (UDTs)

User-defined data types (UDTs) allow you to organize collections of data types into groupings. You can use these groupings, or data type structures, to declare the data types for controller tag structures. Another advantage of defining a UDT is that you may reuse it in other controller tag structures that use the same data types.

The Add-On Instruction for the MVI69L-MBS has pre-defined UDTs. You can find them in the User-Defined subfolder, located in the Data Types folder in the Controller

Organizer pane of the main RSLogix window. Like the controller tags, the UDTs are organized in a multiple-level tree structure.

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5.2.1 MVI69L-MBS User-Defined Data Types

Using Controller Tags

User Manual

Twenty different UDTs are defined for the MVI69L-MBS Add-On Instruction. The main

UDT, MBSMODULEDEF , contains all the data types for the module and was used to create the main controller tag structure, MBS . There are five UDTs one level below

MBSMODULEDEF . These lower-level UDTs were used to create the MBS.CONFIG

MBS.DATA, MBS. CONTROL , MBS.STATUS

, and MBS.UTIL

controller tag structures.

Click the [+] signs to expand the UDT structures and view lower-level UDTs.

For example, if you expand MBS.DATA

, you see that it contains two UDTs, ReadData and WriteData . Both of these are 240-element integer arrays.

Notice that these UDTs are the data types used to declare the MBS.DATA.ReadData

and MBS.DATA.WriteData

controller tag arrays.

The UDTs are commented in the D

ESCRIPTION

column.

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5.3 MBS Controller Tag Overview

Using Controller Tags

User Manual

This and the following sections describe the MBS controller tags in detail.

Tag Name

MBS.CONFIG

MBS.DATA

MBS.CONTROL

MBS.STATUS

MBS.UTIL

Description

Configuration information

MBS input and output data transferred between the processor and the module

Governs the data movement between the PLC rack and the module

Status information

Generic tags used for internal ladder processing (DO NOT MODIFY)

5.3.1 MBS.CONFIG

When ProSoft Configuration Builder (PCB) downloads the configuration file from the PC to the processor, the processor stores the configuration file data in the

MBS.CONFIG.FileData

array. Its CRC is also included in this array.

You cannot edit this array directly. You must use PCB to edit the module configuration since PCB calculates a unique CRC to protect data integrity. Any change to the configuration parameters directly in this array will not match the calculated CRC.

Tag Name

Description

MBS.CONFIG.FileData

This parameter contains the MBS configuration data after it has been downloaded from PCB. It is displayed in ASCII format.

Note : MBS configuration changes cannot be made directly in this array; the configuration must be downloaded with PCB.

MBS.CONFIG.FileSize

Configuration file size ( MBS.CONFIG.FileData

array) in bytes.

MBS.CONFIG.FileCRC32 CRC checksum of the configuration file stored in the array.

MBS.CONFIG.FileStatus

Configuration file status. 0 = No file present, 1 = File present

5.3.2 MBS.DATA

This structure contains the Read Data and Write Data arrays for processor-to-module communication.

Tag Name

MBS.DATA.ReadData

MBS.DATA.WriteData

Description

Data area copied from the module to the processor. This 240 element array stores the Modbus data coming into the module from the Modbus network.

Data area copied from the processor to the module. This 240 element array stores the outgoing data sent from the module to the Modbus network.

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5.3.3 MBS.CONTROL

This array handles special tasks requested by the processor.

Using Controller Tags

User Manual

MBS.CONTROL.PortControl

This array allows port commands to be controlled by the processor.

Tag Name

Set

Get

Port1

Port1.Active

Port1.CmdEnableBits[x]

Range

0 or 1

0 or 1 n/a

0 or 1

Description

Sends Port Control to module

Reads Port Control from module

Definition of Port 1 Control

Port Control: Disable = 0, Enable = 1

Index of command to be controlled.

Example: Command 20 in port 1 command list can be controlled at CmdEnableBits[1].3 - This is the 20 th bit offset.

MBS.CONTROL.CmdControl

This array allows the processor to dynamically enable configured commands.

Tag Name

CmdControlTrigger

NumberOfCommands

PortNumber

CommandIndex[x]

Range

0 or 1

0 to 6

0 or 29

Description

One-shot command control: Disable = 0, Enable = 1

Total number of commands to be executed.

Port number to be associated with command.

Command Index of port command [x] to be enabled. Up to 6 command indexes can be populated at a time.

MBS.CONTROL.EventCmd_DBData

This array allows the processor to dynamically build Modbus commands with data associated to the MBS database. This feature is meant for periodic execution such as resetting the clock and zeroing-out counters.

Tag Name

EventCmdTrigger

PortNumber

SlaveID

InternalDBAddress

PointCount

SwapCode

ModbusFunctionCode

DeviceDBAddress

EventCmdStatusReturned

Range

0 or 1

1 to 248

Description

Toggle to send Event Command.

0 = Disable, 1 = Enable

Port number to be associated with command.

Slave ID of Modbus slave

0 to 479 or

0 to 3839

(bit-level)

0 to 125

0 to 3

Used only if UseModuleDBAddress = 1. Allowable range is 0 to 479 for Modbus Function Codes 3, 4, 6, or

16, and 0 to 3839 for Function Codes 1, 2, 5, or 15

Number of bit/words used in this command.

Swap code 0 = no swap, 1 = word swap, 2 = words & byte swap, 3 = byte swap

- Modbus function code (1,2,3,4,5,6,15, or 16)

0 to 9999 Modbus address of the target slave database

- Event status returned by the module

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Using Controller Tags

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MBS.CONTROL.EventCmd_ProcessorData

This array allows the processor to dynamically build Modbus commands with processor data. This feature is meant for periodic execution such as resetting the clock and zeroing-out counters.

Tag Name

CmdTrigger

GetStatusTrigger

PortNumber

SlaveAddress

ModbusFunctionCode

DeviceDBAddress

PointCount

Data[x]

EventCmdStatusReturned

Port1Status

Port1Status.Status

Range

0 or 1

Description

Toggle to send Event Command.

0 = Disable, 1 = Enable

0 or 1 Toggle to retrieve event status.

0 = Disable, 1 = Enable

1 Port number to be associated with command

1 to 248 Slave ID of Modbus slave

- Modbus function code (5,6,15, or 16)

0 to 9999 Modbus address of the target slave database

0 to 125 Number of bit/words associated with this command.

0 to 49 Data values to be sent to the slave

Command status

Port 1 Status array

Status code. See Communication Error Codes

(page 84).

Last error code

Port1Status.LastError

MBS.CONTROL.SlavePoll

This array allows the processor to enable, disable and retrieve status for slaves.

Tag Name

Port1

Port1.EnableSlaves

Port1.EnableSlaveCount

Port1.EnableSlavesIDs[x]

Port1.DisableSlaves

Port1.DisableSlaveCount

Port1.DisableSlavesIDs[x]

Port1.GetSlavesStatus

Port1.SlavesStatus[x]

Range

0 or 1

1 to 60

0 or 1

1 to 60

0 or 1

Description

Port 1 slave polling control array

Slave Poll request

0 = Disable, 1 = Enable

Number of slaves to be enabled

Data array associated to enable slave request where word x corresponds to slave ID x (0-based).

1 = Enable slave

Triggers disable slaves request

0 = Disable, 1 = Enable

Number of slaves to be disabled

Data array associated to disable slave request where word x corresponds to slave ID x (0-based).

1 = Disable slave

Triggers request to read slave status

0 = Disable, 1 = Enabled

Data array with status

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MBS.CONTROL.Time

This array allows the processor to get or set module time.

Tag Name

SetTime

GetTime

Year

Month

Day

Hour

Minute

Second

Milliseconds

Using Controller Tags

Range

0 or 1

Description

Sends the PLC time to the module

0 = Disable, 1 = Enable

0 or 1 Retrieves the time from the module to PLC

0 = Disable, 1 = Enable

0 to 9999 Four digit year value. Example: 2015

1 to 12 Month

1 to 31

0 to 23

0 to 59

Day

Hour

Minute

Second

0 to 999 Millisecond

User Manual

MBS.CONTROL.GetStatus

This tag allows the processor to retrieve status from the module.

Tag Name

GetStatus

Range

0 or 1

Description

Triggers status retrieval from the module

0 = Disable, 1 = Enable

MBS.CONTROL.ResetStatus

This tag allows the processor to reset the module status counters.

Tag Name

ResetStatus

Range

0 or 1

Description

Triggers module status counter reset

0 = Disable, 1 = Enable

MBS.CONTROL.ColdBoot

This tag allows the processor to Coldboot the module (full reboot).

Tag Name

ColdBoot

Range

0 or 1

Description

Triggers a cold boot of the module

0 = Disable, 1 = Enable

MBS.CONTROL.WarmBoot

This tag allows the processor to Warmboot the module (driver reboot).

Tag Name

WarmBoot

Range

0 or 1

Description

Triggers a warm boot the module

0 = Disable, 1 = Enable

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5.3.4 MBS.STATUS

Using Controller Tags

User Manual

This array contains status data for the module.

Tag Name

PassCnt

Product

Rev

Run

Port1Stats

Port1Stats.CmdListReq

Port1Stats.CmdListResp

Port1Stats.CmdListErr

Port1Stats.PortReq

Port1Stats.PortResp

Description

Program cycle counter

– this value is incremented each time a complete program cycle occurs in the module

Product code

Firmware revision level number

Operating level number

Run number

Port 1 status

Total number of requests made from port 1 to slave devices on the network

Total number of slave response messages received on port 1

Total number of command errors processed on port 1. These errors could be due to a bad response or command

Total number of messages sent out of port 1

Total number of messages received on port 1

Port1Stats.PortErrSent

Port1Stats.PortErrRec

Port1Stats.CurrErr

Port1Stats.LastErr

Block

Block.Read

Block.Write

Block.Parse

Block.Event

Block.Cmd

Block.Err

Port1LastErr

Port1PreviousErr

Total number of message errors sent out of port 1

Total number of message errors received on port 1

Not used

Backplane transfer status

Total number of read blocks transferred from the module to the processor

Total number of write blocks transferred from the processor to the module

Total number of blocks successfully parsed that were received from the processor

Total number of event command blocks received from the processor

Total number of command blocks received from the processor

Total number of block transfer errors recognized by the module

For a slave port, this field contains the value of the current error code returned.

For a master port, this field contains the index of the currently executing command.

For a slave port, this field contains the value of the last error code returned.

For a master port, this field contains the index of the command with an error.

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5.3.5 MBS.UTIL

Using Controller Tags

User Manual

The array is used for internal ladder processing, and must not be modified.

Tag Name

ReadDataSizeGet

WriteDataSizeGet

ReadDataBlkCount

WriteDataBlkCount

RBTSremainder

WBTSremainder

BlockIndex

LastRead

LastWrite

LastWriteInit

ConfigFile

ConfigFile.WordLength

ConfigFile.BlockCount

ConfigFile.FileOffset

ConnectionInputSize

BlockTransferSize

SlotNumber

EventBlockID

EventCmdPending

PollStatusOffset

CmdsAddedToQueue

CmdControlBlockID

CmdCntrlPending

EventDataCmdPending

BootTimer

PassThru[ ] Array

Description

Holds Read Data array size (240)

Holds Write Data array size (240)

Number of Read Data blocks (1)

Number of Write Data blocks (1)

Not used

Computed block offset for data

Latest Read Block ID received from the module

Latest Write Block ID to be sent to the module

Latest Write Block ID used during initialization

Holds variables for configuration file transfer

Length of configuration data to be included in block transfer

Not used

Offset in configuration file to use as a starting point for copying over configuration data

Holds size of the Connection Input array (240)

Size of the backplane transfer blocks (240)

Slot number of the module in the rack

Holds Block ID for Event Command

Keeps an Event Command message from being sent to the module before the previous Event Command is completed

Offset in slave status data array to use as a starting point for copying over slave status data

Number of Command Control messages added to the command queue

Holds Block ID for Command Control

Keeps a Command Control message from being sent to the module before the previous Command Control is completed

Keeps an Event Command with Data message from being sent to the module before the previous Event Command with Data is completed

Timer used to clear both cold and warm boot requests

Holds variables used for processing pass-through messages

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6 Diagnostics and Troubleshooting

Diagnostics and Troubleshooting

User Manual

The MVI69L-MBS provides information on diagnostics and troubleshooting in the following forms:



LED status indicators on the front of the module provide general information on the module's status.



You can view status data contained in the module through the Ethernet port, using the troubleshooting and diagnostic capabilities of ProSoft Configuration Builder

(PCB) .



You can transfer status data values from the module to processor memory and can monitor them in the processor manually or by customer-created logic.

6.1 Ethernet LED Indicators

The Ethernet LEDs indicate the module's Ethernet port status.

LED

Data

State

OFF

Description

Ethernet connected at 10 Mbps duplex speed

AMBER Solid Ethernet connected at 100 Mbps duplex speed

Link

OFF

GREEN Solid or Blinking

No physical network connection is detected. No Ethernet communication is possible. Check wiring and cables.

Physical network connection detected. This LED must be ON solid for Ethernet communication to be possible.

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6.2 LED Status Indicators

Diagnostics and Troubleshooting

User Manual

The LEDs indicate the module’s operating status.

LED

ETH

Status

Off

Indication

Ethernet communications are ok

No Ethernet cable connected

Green

Red

Off

Data is being transferred between the module and the Modbus network on Port 1

Communication error detected

No Modbus network activity detected

CFG Green Configuration is ok

Yellow

Red

Off

Green

Red

Green

Red

Module is reading configuration

Error setting up Modbus protocol driver, failed startup, or module shutting down

Processor is in Program mode

The LED is on when the module is performing a write operation on the backplane. Under normal operation, the LED should blink rapidly on and off.

Major fault or module shutting down

Module is ok

The program has detected an error or is being configured. If the

LED remains red for over 10 seconds, the program has probably halted.

During module configuration, the OK LED is red and the BP ACT LED is on. If the APP,

BP ACT and OK LEDs blink at a rate of every one-second, this indicates a serious problem with the module. Call ProSoft Technology Technical Support to arrange for repairs.

6.2.1 Clearing a Fault Condition

Typically, if the OK LED on the front of the module remains RED for more than ten seconds, a hardware problem has been detected or the program has exited.

To clear the condition, follow these steps:

1 Turn off power to the rack.

2 Remove the card from the rack.

3 Verify that all jumpers are set correctly.

4 If the module requires a Compact Flash card, verify it is installed correctly.

5 Re-insert the card in the rack and turn the power back on.

6 Verify correct configuration data is being transferred to the module from the

CompactLogix controller.

If the module's OK LED does not turn GREEN, verify that the module is inserted completely into the rack. If this does not cure the problem, contact ProSoft Technology

Technical Support.

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6.2.2 Troubleshooting

Diagnostics and Troubleshooting

User Manual

Use the following troubleshooting steps if you encounter problems when the module is powered up. If these steps do not resolve your problem, please contact ProSoft

Technology Technical Support.

Processor Errors

Problem description

Processor fault

Processor I/O LED flashes

Steps to take

Verify that the module is securely plugged into the slot that has been configured for the module in the I/O Configuration in RSLogix.

Verify that the slot location in the rack has been configured correctly in the ladder logic.

This indicates a problem with backplane communications. A problem could exist between the processor and any installed I/O module, not just the MVI69L-MBS. Verify that all modules in the rack are correctly configured.

Module Errors

Problem description

BP ACT LED (not present on MVI56E modules) remains OFF or blinks slowly

MVI69 modules with scrolling LED display:

<Backplane Status> condition reads ERR

OK LED remains RED

Steps to take

This indicates that backplane transfer operations are failing. Connect to the module’s Configuration/Debug port to check this.

To establish backplane communications, verify the following items:

 The processor is in RUN or REM RUN mode.



The backplane driver is loaded in the module.

 The module is configured for read and write data block transfer.



The ladder logic handles all read and write block situations.

 The module is properly configured in the processor I/O configuration and ladder logic.

The program has halted or a critical error has occurred. Connect to the

Configuration/Debug (or Communication) port to see if the module is running. If the program has halted, turn off power to the rack, remove the card from the rack, then re-insert it, and then restore power to the rack.

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6.3 Connecting the PC to the Module's Ethernet Port

Diagnostics and Troubleshooting

User Manual

With the module securely mounted, connect one end of the Ethernet cable to the ETH1

Port, and the other end to an Ethernet hub or switch accessible from the same network as the PC. Or, connect directly from the Ethernet Port on the PC to the ETH 1 Port on the module.

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6.3.1 Setting Up a Temporary IP Address

Diagnostics and Troubleshooting

User Manual

Important: ProSoft Configuration Builder (PCB) locates MVI69L-MBSs through UDP broadcast messages.

These messages may be blocked by routers or layer 3 switches. In that case, ProSoft Discovery Service is unable to locate the modules.

To use ProSoft Configuration Builder, arrange the Ethernet connection so that there is no router/ layer 3 switch between the computer and the module, OR reconfigure the router/ layer 3 switch to allow routing of the UDP broadcast messages.

1 In the tree view in ProSoft Configuration Builder (PCB), select the MVI69L-MBS . (For instructions on opening and using a project in PCB, please refer to Configuring the

MVI69L-MBS Using PCB (page 40).

2 Right-click the module icon in the tree and choose D IAGNOSTICS .

3 In the Diagnostics window, click the S ET U P C ONNECTION button.

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4 In the Connection Setup dialog box, click B ROWSE D EVICE ( S ) to start ProSoft

Discovery Service. Right-click the module and choose A SSIGN T EMPORARY IP .

5 The module’s default IP address is usually 192.168.0.250. Choose an unused IP within your subnet, and then click OK .

Important: The temporary IP address is only valid until the next time the module is initialized. For

information on how to set the module’s permanent IP address, see Ethernet 1 (page 50).

6 Close the ProSoft Discovery Service window. Enter the temporary IP address in the

E THERNET ADDRESS field of the Connection Setup dialog box, then click T EST

C ONNECTION to verify that the module is accessible with the current settings.

7 If the Test Connection is successful, click C ONNECT . The Diagnostics window is now accessible.

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6.4 Using the Diagnostics Menu in PCB

Diagnostics and Troubleshooting

User Manual

ProSoft Configuration Builder (PCB) provides diagnostic menus for debugging and troubleshooting.

To connect to the module’s Configuration/Debug Ethernet port

1 In the tree view in ProSoft Configuration Builder, right-click the MVI69L-MBS and then choose D IAGNOSTICS . For instructions on opening and using a project in PCB,

please refer to Configuring the MVI69L-MBS Using PCB (page 40).

2 After the Diagnostics window opens, click the S ET UP C ONNECTION button to browse for the module’s IP address.

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Diagnostics and Troubleshooting

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3 In the Ethernet field of the Connection Setup dialog box, enter the current IP address, whether it is temporary or permanent. Click T EST C ONNECTION to verify that the module is accessible with the current settings.

4 If the T EST C ONNECTION is successful, click C ONNECT . The Diagnostics window is now visible.

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6.4.1 Diagnostics Menu

Diagnostics and Troubleshooting

User Manual

In the Diagnostics window in ProSoft Configuration Builder, the Diagnostics menu is available through the Ethernet configuration port. The menu is arranged as a tree structure.

6.4.2 Monitoring General Information

In the Diagnostics window in ProSoft Configuration Builder, click MODULE and then click V ERSION to view module version information.

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6.4.3 Monitoring Network Configuration Information

Diagnostics and Troubleshooting

User Manual

In the Diagnostics window in Prosoft Configuration Builder, click NETWORK and then click C

ONFIG

to view the Ethernet network configuration information.

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6.4.4 Monitoring Backplane Information

Diagnostics and Troubleshooting

User Manual

In the Diagnostics window in ProSoft Configuration Builder, click BACKPLANE to view the backplane information. This menu has two submenus:



C ONFIGURATION



S TATUS

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6.4.5 Port 1 Module Information

Diagnostics and Troubleshooting

User Manual

The MODBUS PORT 1 menu includes the following submenus:



Configuration



Status (General status for the port)



Master Commands (Used when port is configured as a Modbus master)



Slave Status List (Status of each slave on the network, used when port is configured as a Modbus master)



Master Command Status (Status code for each master command, used when port is configured as a Modbus master)

6.4.6 Monitoring Data Values in the Module’s Database

In the Diagnostics window in ProSoft Configuration Builder, click DATABASE and then click D ECIMAL to view the contents of the MVI69L-MBS ’s internal database. You can view data values in ASCII, Hexadecimal, and Float format.

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6.5 Communication Error Codes

Diagnostics and Troubleshooting

User Manual

Note: If an error code is reported that is not listed below, check with the documentation of the Modbus device(s) on the module's application ports. Modbus devices can produce device-specific error codes.

6.5.1 Standard MODBUS Protocol Exception Code Errors

Code

Description

Illegal Function Code

Illegal Data Address

Illegal Data Value

Failure in Associated Device

Acknowledge

Busy, Rejected Message

Code

-1

-2

-11

253

254

255

6.5.2 Module Communication Error Codes

Description

CTS modem control line not set before transmit

Timeout while transmitting message

Timeout waiting for response after request

Incorrect slave address in response

Incorrect function code in response

Invalid CRC/LRC value in response

Code

-41

-42

-43

-44

-45

-46

6.5.3 Command List Entry Errors

Description

Invalid enable code

Internal address > maximum address

Invalid node address (< 0 or > 255)

Count parameter set to 0

Invalid function code

Invalid swap code

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6.6 Connecting to the MVI69L-MBS Webpage

The module’s internal web server provides access to module version and status information, as well as the ability to set the date and time, reboot the module, and download firmware upgrade to the module. Enter the assigned IP address of the module into a web browser or use the following steps in PCB.

1 In the PCB Diagnostics window, click the S

ONNECTION

button.

2 In the Connection Setup dialog box, click B ROWSE D EVICE ( S ) to start ProSoft

Discovery Service.

3 Right-click the module icon and choose V IEW M ODULE

’

S W EBPAGE to launch your default browser and display the module’s webpage.

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Diagnostics and Troubleshooting

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7 Reference

Reference

User Manual

7.1 Product Specifications

The MVI69L-MBS allows Rockwell Automation ® CompactLogix ® I/O compatible processors to interface easily with other Modbus protocol compatible devices.

The module acts as an input/output communications module between the Modbus network and the CompactLogix backplane. The data transfer from the CompactLogix processor is asynchronous from the actions on the Modbus network. Databases are user-defined and stored in the module to hold the data required by the protocol.

7.1.1 MVI69L General Specs



Single-slot, 1769 backplane-compatible



The module is recognized as an Input/Output module and has access to processor memory for data transfer between processor and module.



Ladder Logic is used for data transfer between module and processor. Sample

Add-On Instruction file included.



Configuration data obtained from and stored in the processor.



Supports CompactLogix processors with 1769 I/O bus capability and at least 800 mA of 5 VDC backplane current available.

7.1.2 Hardware Specifications

Specification

Dimensions

Current Load

Operating Temp.

Storage Temp.

Relative Humidity

LED Indicators

CFG Port (ETH)

App Port (P1)

Shipped with Unit

Description

Standard 1769 Single-slot module

500 mA max @ 5 VDC

Power supply distance rating of 4 (L43 and L45 installations on first 2 slots of 1769 bus)

32° F to 140° F (0° C to 60°C)

-40° F to 185° F (-40° C to 85° C)

5% to 95% (with no condensation)

Module OK Status

Backplane Activity

Ethernet Port Activity

Configuration Activity

Diagnostics over Ethernet connection

RS-232, RS-485 or RS-422 (jumper selectable)

RJ45 Port (DB-9F with supplied cable)

500V Optical isolation from backplane

RJ45 to DB-9M cable for application port

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7.1.3 General Specifications - Modbus Master/Slave

Communication

Parameters

Baud rate: 110 to 115K baud

Stop bits: 1 or 2

Data size: 7 or 8 bits

Parity: None, Even, Odd

RTS timing delays: 0 to 65535 milliseconds

Modbus Modes

RTU mode (binary) with CRC-16

ASCII mode with LRC error checking

Floating-Point

Data

Modbus Function

Codes Supported

Floating-point data movement supported, including configurable support for Enron, Daniel ® , and other implementations

1: Read Coil Status

2: Read Input Status

3: Read Holding Registers

4: Read Input Registers

5: Force (Write) Single Coil

6: Preset (Write) Single

Holding Register

8: Diagnostics (Slave Only,

Responds to

Subfunction 00)

15: Force( Write) Multiple Coils

16: Preset (Write) Multiple

Holding Registers

17: Report Slave ID (Slave Only)

22: Mask Write Holding

23: Read/Write Holding

Registers (Slave Only)

Reference

User Manual

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7.2 About the Modbus Protocol

Reference

User Manual

Modbus is a widely-used protocol originally developed by Modicon in 1978. Since that time, the protocol has been adopted as a standard throughout the automation industry.

The original Modbus specification uses a serial connection to communicate commands and data between Master and Slave devices on a network. Later enhancements to the protocol allow communication over other types of networks.

Modbus is a Master/Slave protocol. The Master establishes a connection to the remote

Slave. When the connection is established, the Master sends the Modbus commands to the Slave. The MVI69L-MBS can work as a Master and as a Slave.

The MVI69L-MBS also works as an input/output module between itself and the Rockwell

Automation backplane and CompactLogix processor. The module uses an internal database to pass data and commands between the processor and Master and Slave devices on Modbus networks.

7.2.1 Modbus Master

A port configured as a virtual Modbus Master actively issues Modbus commands to other nodes on the Modbus network, supporting up to 30 commands on the port. The

Master port has an optimized polling characteristic that polls slaves with communication problems less frequently.

Command List

Up to 30 commands per Master port, each fully configurable for function, slave address, register to/from addressing and word/bit count.

Polling of command list Configurable polling of command list, including continuous and on change of data, and dynamically user or automatic enabled.

Status Data Error codes available on an individual command basis. In addition, a slave status list is maintained per active Modbus

Master port.

7.2.2 Modbus Slave

A port configured as a Modbus slave permits a remote Master to interact with all data contained in the module. This data can be derived from other Modbus slave devices on the network, through a Master port, or from the CompactLogix processor.

Node address

Status Data

1 to 247 (software selectable)

Error codes, counters and port status available per configured slave port

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Reference

User Manual

7.2.3 Function Codes Supported by the Module

The format of each command in the list depends on the Modbus Function Code being executed. The following table lists the Function Codes supported by the MVI69L-MBS.

Function Code

Definition

Read Coil Status 0x

Read Input Status 1x

Read Holding Registers 4x

Read Input Registers 3x

Set Single Coil 0x

Single Register Write 4x

Supported as Master Supported as Slave

Diagnostics X

Multiple Coil Write 0x

Multiple Register Write 4x

Report Slave ID

Mask Write 4X X

Read/Write X

Each command list record has the same general format. The first part of the record contains the information relating to the communication module and the second part contains information required to interface to the Modbus slave device.

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7.2.4 Read Coil Status (Function Code 01)

Reference

User Manual

Query

This function allows you to obtain the ON/OFF status of logic coils (Modbus 0x range) used to control discrete outputs from the addressed slave only. Broadcast mode is not supported with this function code. In addition to the slave address and function fields, the message requires that the information field contain the initial coil address to be read

(Starting Address) and the number of locations that are interrogated to obtain status data.

The addressing allows up to 2000 coils to be obtained at each request; however, the specific slave device may have restrictions that lower the maximum quantity. The coils are numbered from zero; (coil number 1 = zero, coil number 2 = one, coil number 3 = two, and so on).

The following table is a sample read output status request to read coils 0020 to 0056 (37 coils) from slave device number 11.

Note: This is the structure of the message being sent out to the Modbus network. The byte values below are in hexadecimal display

Node

Address

Function

Code

Data Start

Point High

Data Start

Point Low

Number of

Points High

Number of

Points Low

Error Check

Field (2 bytes)

CRC

Response

An example response to Read Coil Status is as shown in the table below. The data is packed one bit for each coil. The response includes the slave address, function code, quantity of data characters, the data characters, and error checking. Data is packed with one bit for each coil (1 = ON, 0 = OFF). The low order bit of the first character contains the addressed coil, and the remainder follows. For coil quantities that are not even multiples of eight, the last characters are filled in with zeros at high order end. The quantity of data characters is always specified as quantity of RTU characters, that is, the number is the same whether RTU or ASCII is used.

Because the slave interface device is serviced at the end of a controller's scan, data reflects coil status at the end of the scan. Some slaves limit the quantity of coils provided each scan; thus, for large coil quantities, multiple PC transactions must be made using coil status from sequential scans.

Node

Address

Func

Code

Byte

Count

Data Coil

Status 20 to 27

Data Coil

Status 28 to 35

Data Coil

Status 36 to 43

Data Coil

Status 44 to 51

Data Coil

Status 52 to 56

Error Check

Field

(2 bytes)

01 05 CD 6B B2 OE 1B CRC 0B

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Reference

User Manual

The status of coils 20 to 27 is shown as CD (HEX) = 1100 1101 (Binary). Reading from left to right, this shows that coils 27, 26, 23, 22, and 20 are all on. The other Data Coil

Status bytes are decoded similarly. Due to the quantity of coil statuses requested, the last data field, which is shown 1B (HEX) = 0001 1011 (Binary), contains the status of only 5 coils (52 to 56) instead of 8 coils. The 3 left most bits are provided as zeros to fill the 8-bit format.

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7.2.5 Read Input Status (Function Code 02)

Reference

User Manual

Query

This function allows you to obtain the ON/OFF status of discrete inputs (Modbus 1x range) in the addressed slave. PC Broadcast mode is not supported with this function code. In addition to the slave address and function fields, the message requires that the information field contain the initial input address to be read (Starting Address) and the number of locations that are interrogated to obtain status data.

The addressing allows up to 2000 inputs to be obtained at each request; however, the specific slave device may have restrictions that lower the maximum quantity. The inputs are numbered form zero; (input 10001 = zero, input 10002 = one, input 10003 = two, and so on, for a 584).

The following table is a sample read input status request to read inputs 10197 to 10218

(22 coils) from slave number 11.

Note: This is the structure of the message being sent out to the Modbus network. The byte values below are in hexadecimal display.

Node

Address

Function

Code

Data Start

Point High

Data Start

Point Low

Number of

Points High

Number of

Points Low

Error Check Field

(2 bytes)

CRC

Response

An example response to Read Input Status is as shown in the table below. The data is packed one bit for each input. The response includes the slave address, function code, quantity of data characters, the data characters, and error checking. Data is packed with one bit for each input (1=ON, 0=OFF). The lower order bit of the first character contains the addressed input, and the remainder follows. For input quantities that are not even multiples of eight, the last characters are filled in with zeros at high order end. The quantity of data characters is always specified as a quantity of RTU characters, that is, the number is the same whether RTU or ASCII is used.

Because the slave interface device is serviced at the end of a controller's scan, the data reflect input status at the end of the scan. Some slaves limit the quantity of inputs provided each scan; thus, for large coil quantities, multiple PC transactions must be made using coil status for sequential scans.

Node

Address

Func

Code

Byte

Count

Data Discrete

Input 10197 to

10204

Data Discrete

Input 10205 to

10212

Data Discrete

Input 10213 to

10218

Error Check

Field

(2 bytes)

CRC

The status of inputs 10197 to 10204 is shown as AC (HEX) = 10101 1100 (binary).

Reading left to right, this show that inputs 10204, 10202, and 10199 are all on. The other input data bytes are decoded similar.

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Reference

User Manual

Due to the quantity of input statuses requested, the last data field which is shown as 35

HEX = 0011 0101 (binary) contains the status of only 6 inputs (10213 to 102180) instead of 8 inputs. The two left-most bits are provided as zeros to fill the 8-bit format.

7.2.6 Read Holding Registers (Function Code 03)

Query

This function allows you to retrieve the contents of holding registers 4xxxx (Modbus 4x range) in the addressed slave. The registers can store the numerical values of associated timers and counters which can be driven to external devices. The addressing allows retrieving up to 125 registers at each request; however, the specific slave device may have restrictions that lower this maximum quantity. The registers are numbered form zero (40001 = zero, 40002 = one, and so on). The broadcast mode is not allowed.

The example below reads registers 40108 through 40110 (three registers) from slave number 11.

Note: This is the structure of the message being sent out to the Modbus network. The byte values below are in hexadecimal display.

Node

Address

Function

Code

Data Start

Registers

High

Data Start

Registers Low

Data Number of Registers

High

Data Number of Registers

Low

Error Check Field

(2 bytes)

CRC

Response

The addressed slave responds with its address and the function code, followed by the information field. The information field contains 1 byte describing the quantity of data bytes to be returned. The contents of the registers requested (DATA) are two bytes each, with the binary content right justified within each pair of characters. The first byte includes the high order bits and the second, the low order bits.

Because the slave interface device is normally serviced at the end of the controller's scan, the data reflect the register content at the end of the scan. Some slaves limit the quantity of register content provided each scan; thus for large register quantities, multiple transmissions are made using register content from sequential scans.

In the example below, the registers 40108 to 40110 have the decimal contents 555, 0, and 100 respectively.

Node

Address

Function

Code

0B 03

Byte

Count

High

Data

Low

Data

High

Data

Low

Data

High

Data

Low

Data

Error Check

Field

(2 bytes)

CRC

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7.2.7 Read Input Registers (Function Code 04)

Reference

User Manual

Query

This function retrieves the contents of the controller's input registers from the Modbus 3x range. These locations receive their values from devices connected to the I/O structure and can only be referenced, not altered from within the controller, The addressing allows retrieving up to 125 registers at each request; however, the specific slave device may have restrictions that lower this maximum quantity. The registers are numbered for zero

(30001 = zero, 30002 = one, and so on). Broadcast mode is not allowed.

The example below requests the contents of register 30009 in slave number 11.

Note: This is the structure of the message being sent out to the Modbus network. The byte values below are in hexadecimal display.

Node

Address

Function

Code

Data Start

Point High

0B 04 00

Data Start

Point Low

Data Number of Points High

Data Number of Points Low

00 01

Error Check

Field

(2 bytes)

CRC

Response

The addressed slave responds with its address and the function code followed by the information field. The information field contains 1 byte describing the quantity of data bytes to be returned. The contents of the registers requested (DATA) are 2 bytes each, with the binary content right justified within each pair of characters. The first byte includes the high order bits and the second, the low order bits.

Because the slave interface is normally serviced at the end of the controller's scan, the data reflect the register content at the end of the scan. Each PC limits the quantity of register contents provided each scan; thus for large register quantities, multiple PC scans are required, and the data provided is from sequential scans.

In the example below the register 30009 contains the decimal value 0.

Node

Address

Function

Code

Byte Count Data Input

Register High

Data Input

Register Low

Error Check Field

(2 bytes)

0B 04 02 00 00 CRC

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7.2.8 Force Single Coil (Function Code 05)

Reference

User Manual

Query

This Function Code forces a single coil (Modbus 0x range) either ON or OFF. Any coil that exists within the controller can be forced to either state (ON or OFF). However, because the controller is actively scanning, unless the coil is disabled, the controller can also alter the state of the coil. Coils are numbered from zero (coil 0001 = zero, coil 0002

= one, and so on). The data value 65,280 (FF00 HEX) sets the coil ON and the value zero turns it OFF; all other values are illegal and do not affect that coil.

The use of slave address 00 (Broadcast Mode) forces all attached slaves to modify the desired coil.

Note: Functions 5, 6, 15, and 16 are the only messages that are recognized as valid for broadcast.

The example below is a request to slave number 11 to turn ON coil 0173.

Note: This is the structure of the message being sent out to the Modbus network. The byte values below are in hexadecimal display.

Node

Address

Function

Code

Data Start Bit

High

Data Start Bit

Low

Number of

Bits High

Number of

Bits Low

Error Check

Field (2 bytes)

CRC

Response

The normal response to the Command Request is to re-transmit the message as received after the coil state has been altered.

Node

Address

Function

Code

Data Coil Bit

High

Data Coil Bit

Low

Data On/Off Data Error Check

Field (2 bytes)

0B 05 00 AC FF 00 CRC

The forcing of a coil via Modbus function 5 happens regardless of whether the addressed coil is disabled or not ( In ProSoft products, the coil is only affected if you implement the necessary ladder logic).

Note: The Modbus protocol does not include standard functions for testing or changing the DISABLE state of discrete inputs or outputs. Where applicable, this may be accomplished via device specific Program commands (In ProSoft products, this is only accomplished through ladder logic programming).

Coils that are reprogrammed in the controller logic program are not automatically cleared upon power up. Thus, if such a coil is set ON by function Code 5 and (even months later), an output is connected to that coil, the output is "hot".

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7.2.9 Preset Single Register (Function Code 06)

Reference

User Manual

Query

This Function Code allows you to modify the contents of a Modbus 4x range in the slave.

This writes to a single register only. Any holding register that exists within the controller can have its contents changed by this message. However, because the controller is actively scanning, it also can alter the content of any holding register at any time. The values are provided in binary up to the maximum capacity of the controller. Unused high order bits must be set to zero. When used with slave address zero (Broadcast mode), all slave controllers load the specified register with the contents specified.

Note: Functions 5, 6, 15, and 16 are the only messages that are recognized as valid for broadcast.

Note: This is the structure of the message being sent out to the Modbus network. The byte values below are in hexadecimal display.

The example below is a request to write the value ‘3’ to register 40002 in slave 11.

Node

Address

Function

Code

Data Start Bit

High

Data Start

Bit Low

Preset Data

Register High

Preset Data

Register Low

Error Check

Field (2 bytes)

CRC

Response

The response to a preset single register request is to re-transmit the query message after the register has been altered.

Node

Address

Function

Code

Data Register

High

Data Register

Low

Preset Data

Register High

Preset Data

Register Low

Error Check

Field (2 bytes)

CRC

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Reference

User Manual

7.2.10 Diagnostics (Function Code 08)

This function provides a series of tests for checking the communication system between a master device and a slave, or for checking various internal error conditions within a slave.

The function uses a two-byte sub-function code field in the query to define the type of test to be performed. The slave echoes both the function code and sub-function code in a normal response. Some of the diagnostics commands cause data to be returned from the remote device in the data field of a normal response.

In general, issuing a diagnostic function to a remote device does not affect the running of the user program in the remote device. Device memory bit and register data addresses are not accessed by the diagnostics. However, certain functions can optionally reset error counters in some remote devices.

A server device can, however, be forced into 'Listen Only Mode' in which it monitors the messages on the communications system but not respond to them. This can affect the outcome of your application program if it depends upon any further exchange of data with the remote device. Generally, the mode is forced to remove a malfunctioning remote device from the communications system.

Sub-function Codes Supported

Only Sub-function 00 is supported by the MVI69L-MBS.

00 Return Query Data

The data passed in the request data field is to be returned (looped back) in the response. The entire response message should be identical to the request.

Sub-function

00 00

Data Field (Request)

Any

Data Field (Response)

Echo Request Data

Example and State Diagram

Here is an example of a request to remote device to Return Query Data. This uses a sub-function code of zero (00 00 hex in the two-byte field). The data to be returned is sent in the two-byte data field (A5 37 hex).

Request

Field Name

Function

Sub-function Hi

Sub-function Lo

Data Hi

Data Lo

(Hex)

Response

Field Name

Function

Sub-function Hi

Sub-function Lo

Data Hi

Data Lo

(Hex)

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The data fields in responses to other kinds of queries could contain error counts or other data requested by the sub-function code.

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7.2.11 Force Multiple Coils (Function Code 15)

Reference

User Manual

Query

This function forces each coil (Modbus 0x range) in a consecutive block of coils to a desired ON or OFF state. Any coil that exists within the controller can be forced to either state (ON or OFF). However, because the controller is actively scanning, unless the coils are disabled, the controller can also alter the state of the coil. Coils are numbered from zero (coil 00001 = zero, coil 00002 = one, and so on). The desired status of each coil is packed in the data field, one bit for each coil (1= ON, 0= OFF). The use of slave address

0 (Broadcast Mode) forces all attached slaves to modify the desired coils.

Note: Functions 5, 6, 15, and 16 are the only messages (other than Loopback Diagnostic Test) that are recognized as valid for broadcast.

The following example forces 10 coils starting at address 20 (13 HEX). The two data fields, CD =1100 and 00 = 0000 000, indicate that coils 27, 26, 23, 22, and 20 are to be forced on.

Note: This is the structure of the message being sent out to the Modbus network. The byte values below are in hexadecimal display.

Node

Address

Func

Code

Coil

Address

High

Coil

Address

Low

Number of

Coils High

Number of

Coils Low

Byte

Count

Force

Data High

20 to 27

Force

Data Low

28 to 29

Error Check

Field (2 bytes)

0B 0F 00 13 00 0A 02 CD 01 CRC

Response

The normal response is an echo of the slave address, function code, starting address, and quantity of coils forced.

Node

Address

Func

Code

0B 0F

Coil

Address

High

Coil

Address

Low

Number of

Coils High

Number of

Coils Low

Error Check

Field (2 bytes)

0A CRC

Writing to coils with Modbus function 15 is accomplished regardless of whether the addressed coils are disabled or not.

Coils that are not programmed in the controller logic program are not automatically cleared upon power up. Thus, if such a coil is set ON by function code 15 and (even months later) an output is connected to that coil, the output is hot.

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7.2.12 Preset Multiple Registers (Function Code 16)

Reference

User Manual

Query

This Function Code allows you to modify the contents of a Modbus 4x range in the slave.

This writes up to 125 registers at time. Since the controller is actively scanning, it also can alter the content of any holding register at any time.

Note: Function codes 5, 6, 15, and 16 are the only messages that are recognized as valid for broadcast.

The example below is a request to write 2 registers starting at register 40002 in slave 11.

Note: This is the structure of the message being sent out to the Modbus network. The byte values below are in hexadecimal display.

Node

Address

Func

Code

Data Start

Address

High

Data Start

Address

Low

Number of Points

High

Number of Points

Low

Byte

Count

Data

High

Data

Low

Data

High

00 01 00 02 04 00 0A 01

Data

Low

Error

Check

Field (2

bytes)

CRC 0B 10

Response

The normal response to a function 16 query is to echo the address, function code, starting address and number of registers to be loaded.

Node

Address

Func

Code

Data Start

Address

High

Data Start

Address

Low

Number of Points

High

Number of Points

Low

Error Check

Field (2 bytes)

10 00 01 00 02 CRC

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Reference

User Manual

7.3 Floating-Point Support

You can easily move floating point data between the MBS module and other devices as long as the device supports IEEE 754 Floating Point format. This IEEE format is a 32-bit single-precision floating-point format.

The logic necessary to move the floating-point data takes advantage of the COP instruction in RSLogix 5000. The COP instruction is unique for data movement commands in that it is an untyped function, meaning that no data conversion is done when data is moved between controller tags with different data types (that is, it is an image copy, not a value copy).

The COP instruction to move data from a floating-point controller tag into an integer controller tag (something you would do to move floating-point values to the module) is shown below.

This instruction moves one floating-point value in two 16-bit integer images to

MBS.DATA.WriteData[0] , which is an integer tag. For multiple floating-point values increase the Length field by a factor of 2 per floating-point value.

The COP instruction to move data from MBS.DATA.ReadData[0] , which is an integer tag, to a floating-point tag (something you would do to receive floating-point values from the module) is shown below.

This instruction moves two 16-bit integer registers containing one floating point value image into the floating-point tag. For multiple values increase the Length field.

7.3.1 ENRON Floating Point Support

Many manufacturers have implemented special support in their drivers for what is commonly called the Enron version of the Modbus protocol. In this implementation, addresses greater than 7000 are presumed to contain floating-point values. The significance to this is that the count descriptor for a data transfer now denotes the number of floating-point values to transfer, instead of the number of words.

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7.3.2 Configuring the Floating Point Data Transfer

Reference

User Manual

A common question is how to handle floating-point data when using the module as a

Modbus master. This really depends on the slave device and how it addresses this application.

Just because your application is reading or writing floating-point data, does not mean that you must configure the Float Flag, Float Start, and Float Offset parameters within the module.

These parameters are only used to support what is typically referred to as Enron or

Daniel Modbus, where one register address must have 32 bits, or one floating point value. Below is an example:

Example #1

Modbus Address

47101

47102

47103

47104

Data Type

32 bit REAL

Parameter

TEMP Pump #1

Pressure Pump #1

TEMP Pump #2

Pressure Pump #2

With the module configured as a master, you only need to enable these parameters to support a write to this type of addressing (Modbus FC 6 or 16).

If the slave device uses addressing as shown in Example #2, then you do not need to do anything with the Float Flag or Float Start parameters, as this addressing scheme uses two Modbus addresses to represent each floating-point value:

Example #2

Modbus Address

47101

47103

47105

47107

Data Type

32 bit REAL

Parameter

TEMP Pump #1

Pressure Pump #1

TEMP Pump #2

Pressure Pump #2

Because each 32 bit REAL value is represented by two Modbus addresses (example

47101 and 47102 represent TEMP Pump #1), then you do not need to set the Float

Flag , or Float Start for the module for Modbus FC 6 or 16 commands being written to the slave.

The next few pages show three specific examples.

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Example #1: Master issuing Modbus command with FC 16 (with Float Flag: Yes) to transfer Float data to slave.

(Float specific module parameters)

Float Flag: "Y" tells the master to consider the data values that need to be sent to the slave as floating point data where each data value is composed of 2 words (4 bytes or

32 bits).

Float Start - Tells the master that if this address number is <= the address number in

Addr in Dev parameter to double the byte count quantity to be included in the Command

FC6 or FC16 to be issued to the slave. Otherwise the master ignores the Float Flag: Y and treat data as composed of 1 word, 2 bytes.

(Modbus Command parameters)

DB Addr - Tells the master where in its data memory is the beginning of data to obtain and write out to the slave device.

Reg Count - Tells the master how many data points to send to the slave. Two counts mean two floating points with Float Flag: Y and the Addr in Dev greater than or equal to the Float Start Parameter.

Swap Code - Tells the master how to orient the Byte and Word structure of the data value. This is device dependent. Check Command Entry formats Section.

Func Code - Tells the master to write the float values to the slave. FC16.

Addr in Dev - Tells the master where in the slave's database to locate the data.

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Reference

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In the above example, the master's Modbus command to transmit inside the Modbus packet is as follows.

Reg Count Byte Count Data

DEC

HEX

Slave

Address

Function

Code

Address in

Device

7100

1B BC

00 02

85.37 22.86

BD 71 42 AA E1 48 41 B6

In this example, the master's Modbus packet contains the data byte and data word counts that have been doubled from the amount specified by Reg Count due to the Float flag set to Y. Some slaves look for the byte count in the data packet to know the length of the data to read from the wire. Other slaves know at which byte the data begins and read from the wire the remaining bytes in the packet as the data the master is sending.

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Example #2: Master issuing Modbus command with FC 16 (with Float Flag: No) to transfer Float data.

Float Flag: "N" tells the master to ignore the floating values and treat each register data as a data point composed of 1 word, 2 bytes or 16 bits.

Float Start: Ignored.

DB Addr - same as when Float Flag: Y.

Reg Count - Tells the master how many data points to send to the slave.

Swap Code - same as when Float Flag: Y.

Func Code - same as when Float Flag: Y.

Addr in Dev - same as when Float Flag: Y as long as the slave's Float Flag = Y.

In the above example, the master's Modbus command to transmit inside the Modbus packet is as follows.

Data

DEC

HEX

Slave

Address

Function

Code

Address in

Device

7100

1B BC

Reg

Count

00 02

Byte

Count

85.37

BD 71 42 AA

In this example, the master's Modbus packet contains the data byte and data word counts that have NOT been doubled from the amount specified by Reg Count due to the

Float Flag set to N. The slave looks for the byte count in the data packet to know the length of the data to read from the wire. Because of insufficient byte count, some slaves read only half the data from the master's transmission. Other slaves read all 8 bytes in this example because they know where in the packet the data starts and ignore the byte count parameter inside the Modbus packet.

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Example #3: Master issuing Modbus command with FC 3 to transfer Float data from slave.

Reference

User Manual

Float Flag: Not applicable with Modbus Function Code 3.

Float Start: Not applicable with Modbus Function Code 3.

DB Addr - Tells the master where in its data memory to store the data obtained from the slave.

Reg Count - Tells the master how many registers to request from the slave.

Swap Code - same as above.

Func Code - Tells the master to read the register values from the slave. FC3.

Addr in Dev - Tells the master where in the slave's database to obtain the data.

In the above example, the master's Modbus command to transmit inside the Modbus packet is as follows.

DEC

HEX

Slave Address Function Code Address in Device Reg Count

01 3 6100 2

01 03 17 D4 00 02

In the above example the (Enron/Daniel supporting) slave's Modbus command to transmit inside the Modbus packet is as follows.

DEC

HEX

Slave Address Function Code Byte Count Data

01 3 8 32.75 275.69

01 03 08 00 00 42 03 D8 52 43 89

In the above example the (a NON-Enron/Daniel supporting) slave's Modbus command that is transmitted inside the Modbus packet is as follows.

DEC

HEX

Slave Address Function Code Byte Count Data

01 3 4 32.75

01 03 04 00 00 42 03

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7.4 Function Blocks

Reference

User Manual

9956

9957

9958

9959

9961

9970

9972

9973

8000

8100

9000 or -9000

9001 or -9001

9250

9500

9501

9997

9998

9999

Data contained in this database is paged through the input and output images by coordination of the CompactLogix ladder logic and the MVI69L-MBS's program. Each block transferred from the module to the processor or from the processor to the module contains a block identification code that describes the content of the block.

Block ID Range

-1000 to -1166

-1 to -999

1 to 167

Description

Get input image data for initialization

Dummy block

Read or write data for small data sets

Read or write data

1000 to 1255

3000 to 3001

3002 to 3006

5001 to 5006

Event Command Port 1

Port 1 slave polling control

Port 1 slave status

Port 1 Command Control

Add Event with data for Port 1

Get Event with data status

Specifications of configuration file data from the processor to the module

Get configuration file from the processor to the module (continued)

Get general module status data

Set port and command active bits

Get port and command active bits

Pass-through formatted block for functions 6 and 16 with word data

Pass-through formatted block for functions 6 and 16 with float data

Pass-through formatted block for function 5

Pass-through formatted block for function 15

Pass-through formatted block for function 23

Pass-through block for function 99

Set module time using received time

Pass module time to processor

Reset status block

Warm-boot control block

Cold-boot control block

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7.4.1 Event Command Blocks (1000 to 1255)

Blocks 1000 to 1255: Event Port 1

Event Command blocks send Modbus commands directly from the ladder logic the

Master port. The Event Command is added to the high-priority queue and interrupts normal polling so that this special command can be sent as soon as possible.

Note: Overusing Event Commands may substantially slow or totally disrupt normal polling. Use Event

Commands sparingly. Event Commands are meant to be used as one-shot commands triggered by special circumstances or uncommon events.

Blocks 1000 to 1255: Request from Processor to Module

Offset

Description

Write Block ID: 1000 to 1255 for a Port 1 command. The last 3 digits of the command specify the slave address to use for the command.

6 to 239

Internal address in the module to be used with the command.

Count parameter that determines the number of digital points or registers to associate with the command.

Swap type for the data.

Modbus Function Code to be associated with the command.

Modbus address in the slave device to be used in the command.

Spare

Blocks 1000 to 1255: Response from Module to Processor

Offset

Description

Read Block ID: 1000 to 1255 requested by the processor.

Write Block ID: To be used by the processor in its next Write block

Result of the event request. 1 = the command was placed in the command queue; 0 = no room was found in the command queue.

Number of commands in the command queue for the specified port.

Spare

4 to 239

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7.4.2 Slave Polling Disable Block (3000)

Block 3000: Port 1 Slave Polling Disable

This block allows the processor to disable polling for specific slaves.

Reference

User Manual

Block 3000: Request from Processor to Module

Offset

2 to 61

Description

Write Block ID: 3000 for Port 1 slave polling disable request.

Number of slaves listed in the block (1 to 60).

Slave indexes to disable in the command list for the selected port. The number of slaves to process is set in Word 1 of the block.

Block 3000: Response from Module to Processor

Offset

3 to 239

Description

Read Block ID: 3000 requested by the processor.

Write Block ID: To be used by the processor in its next Write block.

Number of slaves processed in the last request. This number should match the value passed in Word 1of the request block.

Spare

7.4.3 Slave Polling Enable Blocks (3001)

Block 3001: Port 1 Slave Polling Enable

This block allows the processor to enable polling for specific slaves.

Block 3001: Request from Processor to Module

Offset

2 to 61

Description

Write Block ID: 3001 for Port 1 slave polling enable request.

Number of slaves listed in the block (1 to 60).

Slave indexes to enable in the command list for the selected port. The number of slaves to process is set in Word 1 of the block.

Block 3001: Response from Module to Processor

Offset

3 to 299

Description

Read Block ID: 3000 to 3101 requested by the processor.

Write Block ID: To be used by the processor in its next Write block.

Number of slaves processed in the last request. This number should match the value passed in Word 1of the request block.

Spare

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7.4.4 Slave Polling Status Block (3002 to 3006)

Reference

User Manual

Blocks 3002 to 3006: Port 1 Slave Status

Two arrays are allocated in the module’s primary object to hold the polling status of each slave on the Master port. You can use this status data to determine which slaves are currently active on the port, in communication error, or have their polling suspended and disabled.

Block 3002 to 3006: Request from Processor to Module

Offset

1 to 239

Description

Write Block ID: 3002 to 3006 for Port 1 slave polling status request.

Spare

Block 3002 to 3006: Response from Module to Processor

Offset

Description

Read Block ID: 3002 to 3006 requested by the processor.

4 to 61

62 to 239

Write Block ID: To be used by the processor in its next Write block.

Slave ID offset: Index of first slave in block

Number of slaves in this block

Slave polling status data

Spare

Slave Status values

Value

Description

Exceeded retry count and in error delay count mode

Block 3000 or 3100

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7.4.5 Command Control Blocks (5001 to 5006)

Reference

User Manual

Blocks 5001 to 5006: Port 1 Command Control

If the CompactLogix processor sends a command control block, the module places the commands referenced in the block in the command queue. Commands placed in the queue with this method need not have their enable bit set. Only valid commands are placed in the queue.

Up to 6 commands can be enabled and placed in the command queue with one write request from the CompactLogix processor.

Blocks 5001 to 5006: Request from Processor to Module

Offset

7 to 239

Description

Write Block ID: 5001 to 5006 for Port 1. The last digit indicates how many commands are to be placed in the command queue by this block.

Index in the command list for the first command to be entered into the command queue (applies to blocks 5001 to 5006).

Index for the second command (applies to blocks 5002 to 5006).

Index for the third command (applies to blocks 5003 to 5006).

Index for the fourth command (applies to blocks 5004 to 5006).

Index for the fifth command (applies to blocks 5005 to 5006).

Index for the sixth command (applies to blocks 5006).

Spare

Blocks 5001 to 5006: Response from Module to Processor

Offset

4 to 239

Description

Read Block ID: 5001 to 5006 requested by the processor.

Write Block ID: To be used by the processor in its next Write block.

Number of commands in the block placed in the command queue.

Number of commands in the command queue for the specified port.

Spare

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7.4.6 Add Event with Data Block (8000)

Reference

User Manual

Block 8000: Add Event with Data for Port 1

The 8000-series blocks are similar to the 1000-series blocks. The 8000-series blocks sou rce the command data from the processor, instead of from the module’s database.

Block 8000: Request from Processor to Module

Offset

5 to 54

55 to 239

Description

Write Block ID: 8000 for Port 1 event command with data request

Slave address of Modbus device to reach with the command request

Modbus function code to use with command (5, 6, 15 or 16)

Modbus address in slave device

Count value for operation- bit count for function 15 (1 to 800 points) and word count for function 16 (1 to 50 words or 1 to 25 float values). For functions 5 and 6, the count is assumed to be 1.

Data to be used by command.

Spare

Block 8000: Response from Module to Processor

Offset

Description

Read Block ID: 8000 for Port 1 event command with data request

Write Block ID: To be used by the processor in its next Write block.

Error Code for request:

0 = No error

-1 = Port is not enabled

-2 = Port is not a master port

-3 = Port is not active (enabled)

-4 = Port busy with previous event command

-5 = Invalid Modbus command

-6 = Invalid point count for command

Spare

3 to 239

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7.4.7 Get Event with Data Status Block (8100)

Block 8100: Get Event with Data Status

This block requests status data for Event with Data Commands.

Block 8100: Request from Processor to Module

Offset

1 to 239

Description

Write Block ID: 8100 status data request for Event with Data Commands.

Spare

Block 8100: Response from Module to Processor

Offset

6 to 239

Description

Read Block ID: 8100 status data for Event with Data Commands.

Write Block ID: To be used by the processor in its next Write block.

Event command status for Port 1:

0=No message active

1=Waiting to execute command

2=Command complete

Error code for last command executed for Port 1

Spare

Reference

User Manual

7.4.8 Get Configuration File Information Block (9000 or -9000)

Block 9000 or -9000: Get Configuration File Information

This block requests information from the processor about the configuration file, in preparation for transferring the configuration file from the processor to the module. It specifies the location in the configuration file to start copying and sending the information.

Block 9000 or -9000: Request from Module to Processor

Offset

Description

Read Block ID: 9000 or -9000 request for configuration file information from processor

Write Block ID: 9000 or -9000 to be used by the processor in its next Write block.

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Block 9000 or -9000: Response from Processor to Module

Description

Write Block ID: 9000 or -9000 configuration file information

Module's slot number.

Size of the module's Input image to the processor.

Size of the module's Output image from the processor.

Status of configuration file.

These two registers contain the size of the configuration file in bytes.

These two registers contain the CRC for the configuration file.

Offset

5-6

7-8

Reference

User Manual

7.4.9 Get Configuration File Block (9001 or -9001)

Block 9001 or -9001: Get Configuration File Information

This block requests the configuration file from the processor. The module returns the requested contents of the configuration file.

Block 9001 or -9001: Request from Module to Processor

Offset

2 to 3

4 to 5

6 to 7

Description

Read Block ID: 9001 or -9001 request for configuration file from processor

Write Block ID: 9001 or -9001 to be used by the processor in its next Write block.

File offset: Offset of the first register in the configuration file to begin transferring data from. If the size of the configuration file exceeds the block transfer size, the file is transferred in multiple blocks, and the file offset tells the processor which part of the configuration file is being requested by the individual block.

Number of bytes of the configuration file to include in next block

Copy of the data contained in registers 2 to 3.

Block 9001 or -9001: Response from Processor to Module

Offset

1 to 2

3 to 4

5 to 239

Description

Write Block ID: 9001 or -9001 configuration file data

File offset: Same as registers 2-3 of the previous request block

Data length: Same as registers 4-5 of the previous request block

Contents of configuration file. If the size of the configuration file exceeds the block transfer size, this information is transferred in multiple blocks.

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7.4.10 Get General Module Status Data Block (9250)

Block 9250: Get General Module Status Data

This block requests the general module status.

Reference

User Manual

Block 9250: Request from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9250 request for general module status

Spare

Block 9250: Response from Module to Processor

Offset

3 to 4

5 to 6

7 to 8

9 to 10

18 to 24

Description

Read Block ID: 9250 requested by processor.

Write Block ID: To be used by the processor in its next Write block.

Program Scan Count: This value is incremented each time a complete program cycle occurs in the module.

Product Code: These two registers contain the product code of "MB6E" for the

MVI69L-MBS.

Product Version: These two registers contain the product version for the current running software.

Operating System: These two registers contain the month and year values for the program operating system.

Run Number: These two registers contain the run number value for the currently running software.

Port 1 Command List Requests: Number of requests made from this port to slave devices on the network.

Port 1 Command List Response: Number of slave response messages received on the port.

Port 1 Command List Errors: Number of command errors processed on the port.

These errors could be due to a bad response or command.

Port 1 Requests: Total number of messages sent out of the port.

Port 1 Responses: Total number of messages received on the port.

Port 1 Errors Sent: Total number of message errors sent out of the port.

Port 1 Errors Received: Total number of message errors received on the port.

Spare

Read Block Count: Total number of read blocks transferred from the module to the processor.

Write Block Count: Total number of write blocks transferred from the processor to the module.

Parse Block Count: Total number of blocks successfully parsed that were received from the processor.

Event Command Block Count: Total number of Event Command blocks received from the processor.

Command Control Block Count: Total number of Command Control blocks received from the processor.

Error Block Count: Total number of block errors recognized by the module.

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Offset

Reference

User Manual

Description

Port 1 Current Error: For a slave port, this field contains the value of the current error code returned. For a master port, this field contains the index of the currently executing command.

33 to 239

Port 1 Last Error: For a slave port, this field contains the value of the last error code returned. For a master port, this field contains the index of the command with an error.

Spare

7.4.11 Set Port and Command Active Bits Block (9500)

Block 9500: Set Port and command active bits

This block enables and disables Port 1, as well as individual Master commands for a port.

Block 9500: Request from Processor to Module

Offset

2 to 21

23 to 42

43 to 239

Description

Write Block ID: 9500 to set port and command enable/disable state

Port 1 active state: 0=disabled, 1=enabled

Command enable bits for Port 1 commands (0=disabled, 1=enabled)

Spare

Command enable bits for Port 2 commands (0=disabled, 1=enabled)

Spare

Block 9500: Response from Module to Processor

Offset

2 to 239

Description

Read Block ID: 9500 requested by processor.

Write Block ID: To be used by the processor in its next Write block.

Spare

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7.4.12 Get Port and Command Active Bits Block (9501)

Reference

User Manual

Block 9501: Get Port and command active bits

This block requests the enabled/disabled status of the application port and Master commands.

Block 9501: Request from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9501 to get port and command enable/disable state

Spare

Block 9501: Response from Module to Processor

Offset

3 to 22

24 to 43

44 to 239

Description

Read Block ID: 9501 requested by processor.

Write Block ID: To be used by the processor in its next Write block.

Port 1 active state: 0=disabled, 1=enabled

Command enable bits for Port 1 commands (0=disabled, 1=enabled)

Spare

Command enable bits for Port 2 commands (0=disabled, 1=enabled)

Spare

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Reference

User Manual

7.4.13 Pass-through Formatted Block for Functions 6 and 16 with Word

Data Block (9956)

Block 9956: Pass-Through Formatted Block for Functions 6 and 16 with Word Data

Block

If the slave port on the module is configured for formatted Pass-Through mode, the module sends input image blocks with identification codes of 9956, 9957, 9958 or 9959 to the processor for each write command received. Any incoming Modbus Function 5, 6,

15 or 16 command is passed from the port to the processor using a block identification number that identifies the Function Code received in the incoming command.

The MBS Add-On Instruction handles the receipt of all Modbus write functions and to respond as expected to commands issued by the remote Modbus Master device.

Block 9956: Request from Module to Processor

Offset

4 to 239

Description

Read Block ID: 9956

Write Block ID: 9956

Number of word registers in Modbus data set

Starting address for Modbus data set

Data

The ladder logic is responsible for parsing and copying the received message and performing the proper control operation as expected by the Master device. The processor must then respond to the Pass-Through control block with an output image write block with the following format.

This informs the module that the command has been processed and can be cleared from the Pass-Through queue.

Block 9956: Response from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9956

Spare

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7.4.14 Pass-through Formatted Block for Functions 6 and 16 with Float Data

Block (9957)

Block 9957: Pass-Through Formatted Block for Functions 6 and 16 with Float Data Block

Block 9957: Request from Module to Processor

Offset

4 to 239

Description

Read Block ID: 9957

Write Block ID: 9957

Number of word registers in Modbus data set

Starting address for Modbus data set

Data

The ladder logic is responsible for parsing and copying the received message and performing the proper control operation as expected by the Master device. The processor must then respond to the Pass-Through block with a write block with the following format.

Block 9957: Response from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9957

Spare

This informs the module that the command has been processed and can be cleared from the Pass-Through queue.

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7.4.15 Pass-through Formatted Block for Function 5 (9958)

Block 9958: Pass-Through Formatted Block for Function 5

Block 9958: Request from Module to Processor

Offset

4 to 239

Description

Read Block ID: 9958

Write Block ID: 9958

Number of word registers in Modbus data set

Starting address for Modbus data set

Data

Block 9958: Response from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9958

Spare

This informs the module that the command has been processed and can be cleared from the Pass-Through queue.

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7.4.16 Pass-through Formatted Block for Function 15 (9959)

Block 9959: Pass-Through Formatted Block for Function 15

When the module receives a function code 15 in Pass-Through mode, the module writes the data using block ID 9959 for multiple-bit data. First the bit mask clears the bits to be updated. This is accomplished in RSLogix 5000 by ANDing the inverted mask with the existing data.

Next, the new data ANDed with the mask is ORed with the existing data. This protects the other bits in the INT registers from being affected.

Block 9959: Request from Module to Processor

Offset

4 to 28

29 to 53

Description

Read Block ID: 9959

Write Block ID: 9959

Length in words

Data address

Modbus Data

Bit mask to use with the data set. Each bit to be considered with the data set has a value of 1 in the mask. Bits to ignore in the data set has a value of 0 in the mask.

Spare

54 to 239

Block 9959: Response from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9959

Spare

This informs the module that the command has been processed and can be cleared from the Pass-Through queue .

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7.4.17 Pass-through Formatted Block for Function 23 (9961)

Block 9961: Pass-Through Formatted Block for Function 23

Reference

User Manual

Block 9961: Request from Module to Processor

Offset

4 to 239

Description

Read Block ID: 9961

Write Block ID: 9961

Number of word registers in Modbus data set

Starting address for Modbus data set

Data

The ladder logic is responsible for parsing and copying the received message and performing the proper control operation as expected by the Master device. The processor must then respond to the pass-through control block with an output image write block with the following format.

Block 9961: Response from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9961

Spare

This informs the module that the command has been processed and can be cleared from the Pass-Through queue.

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Reference

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7.4.18 Pass-through Block for Function 99 (9970)

Block 9970: Pass-Through Block for Function 99

Block 9970: Request from Module to Processor

Offset

4 to 239

Description

Read Block ID: 9970

Write Block ID: 9970

Spare

Block 9970: Response from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9970

Spare

This informs the module that the command has been processed and can be cleared from the Pass-Through queue.

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7.4.19 Set Module Time Using Received Time Block (9972)

Block 9972: Set Module Time Using Received Time Block

This block uses the time information from the processor to set the module time.

Offset

8 to 239

Block 9972: Request from Processor to Module

Description

Write Block ID: 9972

Year (0-9999)

Month (1-12)

Day (1-31)

Hour (0-23)

Minutes (0-59)

Seconds (0-59)

Milliseconds (0-999)

Spare

Block 9972: Response from Module to Processor

Offset

3 to 239

Description

Read Block ID: 9972

Write Block ID: To be used by the processor in its next Write block.

Return code 0=OK, -1=error

Spare

Reference

User Manual

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7.4.20 Pass Module Time to Processor Block (9973)

Block 9973: Pass Module Time to Processor Block

This block uses the time information from the module to set the processor time.

Block 9973: Request from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9973

Spare

Offset

9 to 239

Block 9973: Response from Module to Processor

Description

Read Block ID: 9973

Write Block ID: To be used by the processor in its next Write block.

Year (0-9999)

Month (1-12)

Day (1-31)

Hour (0-23)

Minutes (0-59)

Seconds (0-59)

Milliseconds

Spare

Reference

User Manual

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7.4.21 Reset Status Block (9997)

Block 9997: Reset Status Block

This block resets the module and port 1 status.

Block 9997: Request from Processor to Module

Offset

4 to 239

Description

Write Block ID: 9997

Reset Module status (0=no, else yes)

Reset Port 1 status (0=no, else yes)

Spare

Block 9997: Response from Module to Processor

Offset

2 to 239

Description

Read Block ID: 9997

Write Block ID: To be used by the processor in its next Write block.

Spare

Reference

User Manual

7.4.22 Warm-boot Control Block (9998)

Block 9998: Warm-boot Control Block

If the CompactLogix sends a block number 9998, the module performs a warm-boot operation. The module reconfigures the application port and reset the error and status counters.

Block 9998: Request from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9998

Spare

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7.4.23 Cold-boot Control Block (9999)

Block 9999: Cold-boot Control Block

If the CompactLogix processor sends a block number 9999, the firmware performs a cold-boot operation. The firmware reloads the configuration file from the processor to the module and resets all MBS memory, error and status data.

Block 9999: Request from Processor to Module

Offset

1 to 239

Description

Write Block ID: 9999

Spare

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Crossover cable

RJ-45 PIN

1 Rx+

2 Rx-

3 Tx+

6 Tx-

RJ-45 PIN

3 Tx+

6 Tx-

1 Rx+

2 Rx-

Reference

User Manual

7.5 Ethernet Port Connection

7.5.1 Ethernet Cable Specifications

The recommended cable is Category 5 or better. A Category 5 cable has four twisted pairs of wires, which are color-coded and cannot be swapped. The module uses only two of the four pairs.

The Ethernet port or ports on the module are Auto-Sensing. You can use either a standard Ethernet straight-through cable or a crossover cable when connecting the module to an Ethernet hub, a 10/100 Base-T Ethernet switch, or directly to a PC. The module detects the cable type and uses the appropriate pins to send and receive

Ethernet signals.

Some hubs have one input that can accept either a straight-through or crossover cable, depending on a switch position. In this case, you must ensure that the switch position and cable type agree.

Refer to Ethernet Cable Configuration (page 129) for a diagram of how to configure

Ethernet cable.

Ethernet Cable Configuration

Note: The standard connector view shown is color-coded for a straight-through cable.

Straight- through cable

RJ-45 PIN

1 Rx+

2 Rx-

3 Tx+

6 Tx-

RJ-45 PIN

1 Tx+

2 Tx-

3 Rx+

6 Rx-

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Ethernet Performance

Ethernet performance in the MVI69L-MBS can be affected in the following way:



Accessing the web interface (refreshing the page, downloading files, and so on) may affect performance



Also, high Ethernet traffic may impact performance, so consider one of these options: o o

Use managed switches to reduce traffic coming to module port

Use CIPconnect for these applications and disconnect the module Ethernet port from the network

7.6 Modbus Application Port Connection

The module supports RS-232, RS-422, and RS-485 wiring to remote devices.

7.6.1 RS-232 Wiring

When the RS-232 interface is selected, the use of hardware handshaking (control and monitoring of modem signal lines) is user definable. If no hardware handshaking is used, here are the cable pin-outs to connect to the port.

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RS-232: Modem Connection (Hardware Handshaking Required)

This type of connection is required between the module and a modem or other communication device.

Reference

User Manual

The "Use CTS Line" parameter for the port configuration should be set to 'Y' for most modem applications.

RS-232: Null Modem Connection (Hardware Handshaking)

This type of connection is used when the device connected to the module requires hardware handshaking (control and monitoring of modem signal lines).

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RS-232: Null Modem Connection (No Hardware Handshaking)

This type of connection can be used to connect the module to a computer or field device communication port.

Note: For most null modem connections where hardware handshaking is not required, the Use CTS Line parameter should be set to N and no jumper is required between Pins 7 (RTS) and 8 (CTS) on the connector. If the port is configured with the Use CTS Line set to Y, then a jumper is required between the

RTS and the CTS lines on the port connection.

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7.6.2 RS-422 Wiring

Reference

User Manual

The RS-422 interface requires a single four or five wire cable. The Common connection is optional, depending on the RS-422 network devices used. The cable required for this interface is shown below:

7.6.3 RS-485 Wiring

The RS-485 interface requires a single two or three wire cable. The Common connection is optional, depending on the RS-485 network devices used. The cable required for this interface is shown below:

Note: This type of connection is commonly called a RS-485 half-duplex, 2-wire connection. If you have RS-

485 4-wire, full-duplex devices, they can be connected to the gateway's serial ports by wiring together the

TxD+ and RxD+ from the two pins of the full-duplex device to Pin 1 on the gateway and wiring together the

TxD- and RxD- from the two pins of the full-duplex device to Pin 8 on the gateway. As an alternative, you could try setting the gateway to use the RS-422 interface and connect the full-duplex device according to the RS-422 wiring diagram. For additional assistance, please contact ProSoft Technical Support.

Note: Depending upon devices on the network, if there are problems in RS-485 communication that can be attributed to the signal echoes or reflections, then consider adding 120 OHM terminating resistors at both ends of the RS-485 line.

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RS-485 and RS-422 Tip

If communication in the RS-422 or RS-485 mode does not work at first, despite all attempts, try switching termination polarities. Some manufacturers interpret + and -, or A and B, polarities differently.

7.6.4 DB9 to RJ45 Adaptor (Cable 14)

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8 Support, Service & Warranty

Support, Service & Warranty

User Manual

8.1 Contacting Technical Support

ProSoft Technology, Inc. is committed to providing the most efficient and effective support possible. Before calling, please gather the following information to assist in expediting this process:

1 Product Version Number

2 System architecture

3 Network details

If the issue is hardware related, we will also need information regarding:

1 Module configuration and associated ladder files, if any

2 Module operation and any unusual behavior

3 Configuration/Debug status information

4 LED patterns

5 Details about the interfaced serial, Ethernet or Fieldbus devices

Note: For technical support calls within the United States, ProSoft’s 24/7 after-hours phone support is available for

urgent plant-down issues.

North America (Corporate Location)

Phone: +1.661.716.5100 [email protected]

Languages spoken: English, Spanish

REGIONAL TECH SUPPORT [email protected]

Latin America Regional Office

Phone: +52.222.264.1814 [email protected]

Languages spoken: Spanish, English

REGIONAL TECH SUPPORT [email protected]

Europe / Middle East / Africa Regional Office

Phone: +33.(0)5.34.36.87.20 [email protected]

Languages spoken: French, English

REGIONAL TECH SUPPORT [email protected]

Asia Pacific Regional Office

Phone: +60.3.2247.1898 [email protected]

Languages spoken: Bahasa, Chinese, English,

Japanese, Korean

REGIONAL TECH SUPPORT [email protected]

For additional ProSoft Technology contacts in your area, please visit: https://www.prosoft-technology.com/About-Us/Contact-Us .

8.2 Warranty Information

For complete details regarding ProSoft Technology’s TERMS & CONDITIONS OF SALE,

WARRANTY, SUPPORT, SERVICE AND RETURN MATERIAL AUTHORIZATION

INSTRUCTIONS, please see the documents at: www.prosoft-technology/legal

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