ProSoft Technology inRax MVI56-DH485R User Manual

MVI56-DH485R

ControlLogix Platform

DH485 Interface Module for Remote
Chassis

August 27, 2009

USER MANUAL

Important Installation Instructions

Power, Input and Output (I/O) wiring must be in accordance with Class I, Division 2 wiring methods, Article 501-4 (b)
of the National Electrical Code, NFPA 70 for installation in the U.S., or as specified in Section 18-1J2 of the Canadian
Electrical Code for installations in Canada, and in accordance with the authority having jurisdiction. The following
warnings must be heeded:

A WARNING - EXPLOSION HAZARD - SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR

CLASS I, DIV. 2;

B WARNING - EXPLOSION HAZARD - WHEN IN HAZARDOUS LOCATIONS, TURN OFF POWER BEFORE

REPLACING OR WIRING MODULES

C WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN

SWITCHED OFF OR THE AREA IS KNOWN TO BE NONHAZARDOUS.

D THIS DEVICE SHALL BE POWERED BY CLASS 2 OUTPUTS ONLY.

MVI (Multi Vendor Interface) Modules

WARNING - EXPLOSION HAZARD - DO NOT DISCONNECT EQUIPMENT UNLESS POWER HAS BEEN
SWITCHED OFF OR THE AREA IS KNOWN TO BE NON-HAZARDOUS.

AVERTISSEMENT - RISQUE D'EXPLOSION - AVANT DE DÉCONNECTER L'EQUIPMENT, COUPER LE
COURANT OU S'ASSURER QUE L'EMPLACEMENT EST DÉSIGNÉ NON DANGEREUX.

CL I Div 2 GPs A, B, C, D

Temp Code T5

II 3 G

Ex nA IIC T5 X

0° C <= Ta <= 60° C

II - Equipment intended for above ground use (not for use in mines).

3 - Category 3 equipment, investigated for normal operation only.

G - Equipment protected against explosive gasses.

Warnings

North America Warnings

A Warning - Explosion Hazard - Substitution of components may impair suitability for Class I, Division 2.
B Warning - Explosion Hazard - When in Hazardous Locations, turn off power before replacing or rewiring

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

C Suitable for use in Class I, division 2 Groups A, B, C and D Hazardous Locations or Non-Hazardous Locations.

ATEX 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 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 DO NOT OPEN WHEN ENERGIZED.

Electrical Ratings

 Backplane Current Load: 800 mA @ 5 V DC; 3mA @ 24V DC
 Operating Temperature: 0 to 60°C (32 to 140°F)
 Storage Temperature: -40 to 85°C (-40 to 185°F)
 Shock: 30g Operational; 50g non-operational; Vibration: 5 g from 10 to 150 Hz
 Relative Humidity 5% to 95% (non-condensing)
 All phase conductor sizes must be at least 1.3 mm(squared) and all earth ground conductors must be at least

4mm(squared).

Markings:

ANSI / ISA ISA 12.12.01 Class I Division 2, GPs A, B, C, D
CSA/cUL C22.2 No. 213-1987
CSA CB Certified IEC61010
ATEX EN60079-0 Category 3, Zone 2

EN60079-15

243333

Battery Life Advisory

MVI46, MVI56, MVI69 and MVI71 series use a rechargeable Lithium Vanadium Pentoxide battery to backup the 512K
SRAM memory, real-time clock, and CMOS. The battery should last for the life of the module.

The module must be powered for approximately twenty hours before it becomes fully charged. After it is fully charged,
the battery provides backup power for the CMOS setup and configuration data, the real-time clock, and the 512K
SRAM memory for approximately 21 days.

Before you remove a module from its power source, ensure that the battery within the module is fully charged. A fully
charged battery will hold the BIOS settings (after being removed from its power source) for a limited number of days.
When the battery is fully discharged, the module will revert to the default BIOS settings.

Note: The battery is not user replaceable.

Your Feedback Please

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

ProSoft Technology
5201 Truxtun Ave., 3rd Floor
Bakersfield, CA 93309
[phone]
[phone] (Fax)
www.prosoft-technology.com
[e-mail]

Copyright © ProSoft Technology, Inc. 2009. All Rights Reserved.

MVI56-DH485R User Manual
August 27, 2009

ProSoft Technology
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.

®

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

ProSoft Technology® Product Documentation

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 on the enclosed CD-ROM,
and are available at no charge from our web site: www.prosoft-technology.com

Printed documentation is available for purchase. Contact ProSoft Technology for pricing and availability.

North America: +1.661.716.5100

Asia Pacific: +603.7724.2080

Europe, Middle East, Africa: +33 (0) 5.3436.87.20

Latin America: +1.281.298.9109

Contents MVI56-DH485R ♦ ControlLogix Platform
User Manual DH485 Interface Module for Remote Chassis

Contents

Important Installation Instructions .......................................................................................................2

MVI (Multi Vendor Interface) Modules ................................................................................................2

Warnings............................................................................................................................................. 2

Battery Life Advisory ...........................................................................................................................3

Your Feedback Please........................................................................................................................3

ProSoft Technology® Product Documentation....................................................................................4

Guide to the MVI56-DH485R User Manual 7

1 Start Here 9

1.1 System Requirements............................................................................................... 9

1.2 Package Contents................................................................................................... 10

1.3 Install ProSoft Configuration Builder Software........................................................11

1.4 Setting Jumpers ......................................................................................................12

1.5 Install the Module in the Rack .................................................................................13

1.6 Connect your PC to the ControlLogix Processor ....................................................14

1.7 Download the Sample Program to the Processor................................................... 15

1.8 Connect your PC to the Module ..............................................................................18

2 Module Configuration 19

2.1 Using ProSoft Configuration Builder .......................................................................19

2.2 [Module]...................................................................................................................24

2.3 [DH485 Port x].........................................................................................................26

2.4 [DH485 Port x Commands] .....................................................................................29

2.5 [DH485 Port x Maps]............................................................................................... 32

2.6 Download the Project to the Module .......................................................................34

3 Ladder Logic 35

3.1 Module Data Object (DH485ModuleDef) ................................................................35

3.2 Adding the Module to an Existing Project ...............................................................38

4 Diagnostics and Troubleshooting 41

4.1 Reading Status Data from the Module.................................................................... 41

4.2 Configuration/Debug Port........................................................................................ 41

4.3 LED Status Indicators..............................................................................................53

5 Reference 55

5.1 Product Specifications.............................................................................................55

5.2 Functional Overview................................................................................................57

5.3 DH485 Communication Ports..................................................................................75

5.4 MVI56-DH485R Status Data ...................................................................................81

5.5 Maximum Element Counts For Read/Write Commands......................................... 84

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5.6 Command Definition Form...................................................................................... 86

5.7 File Override Map Definition Form.......................................................................... 87

6 Support, Service & Warranty 89

6.1 How to Contact Us: Technical Support................................................................... 89

6.2 Return Material Authorization (RMA) Policies and Conditions............................... 90

6.3 LIMITED WARRANTY............................................................................................ 91

Index 95

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Start Here MVI56-DH485R ♦ ControlLogix Platform
User Manual DH485 Interface Module for Remote Chassis

Guide to the MVI56-DH485R User Manual

Function Section to Read Details

Introduction
(Must Do)

Verify Communication,
Diagnostic and
Troubleshooting

Reference
Product Specifications
Functional Overview

Support, Service, and
Warranty

Index

→

→

→

→

Start Here (page 9)

Verifying
Communication
(page 53)

Diagnostics and
Troubleshooting
(page

41)

Reference (page 55)
Functional Overview

(page 57)
Product

Specifications (page

55)

Support, Service
and Warranty (page

89)

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

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

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

This section contains Support, Service and
Warranty information.

Index of chapters.

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Start Here MVI56-DH485R ♦ ControlLogix Platform User Manual DH485 Interface Module for Remote Chassis

1 Start Here

In This Chapter

 System Requirements ............................................................................. 9



Package Contents .................................................................................10

 Install ProSoft Configuration Builder Software.......................................11



Setting Jumpers ....................................................................................12

 Install the Module in the Rack ...............................................................13



Connect your PC to the ControlLogix Processor................................... 14

 Download the Sample Program to the Processor.................................. 15



Connect your PC to the Module ............................................................18

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

®

 Rockwell Automation

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 safely connect

and ControlLogix devices to a power source and to the MVI56-DH485R
module’s application port(s).

RSLogix™ software: launch the program, configure

Caution: You must be able to complete the application without exposing personnel or

equipment to unsafe or inappropriate working conditions.

1.1 System Requirements

The MVI56-DH485R module requires the following minimum hardware and
software components:

 Rockwell Automation ControlLogix™ processor, with compatible power

supply and one free slot in the rack, for the MVI56-DH485R module. The
module requires 800mA of available power.

 Rockwell Automation RSLogix 5000 programming software version 2.51 or

higher.

 Rockwell Automation RSLinx communication software
 Pentium

recommended

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®

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

MVI56-DH485R ♦ ControlLogix Platform Start Here
DH485 Interface Module for Remote Chassis User Manual

 Supported operating systems:

o Microsoft Windows XP Professional with Service Pack 1 or 2
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)

 256-color VGA graphics adapter, 800 x 600 minimum resolution (True Color

1024 × 768 recommended)

 CD-ROM drive
 ProSoft Configuration Builder, HyperTerminal or other terminal emulator

program.

Note: You can install the module in a local or remote rack. For remote rack installation, the module
requires EtherNet/IP or ControlNet communication with the processor.

1.2 Package Contents

The following components are included with your MVI56-DH485R module, 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 Part Number Part Description

1

1 Cable

3 Cable

2 Adapter 1454-9F

1

MVI56­DH485R
Module

ProSoft
Solutions CD

MVI56-DH485R DH485 Interface Module for Remote Chassis

Cable #15, RS232
Null Modem

Cable #14, RJ45 to
DB9 Male Adapter
cable

For RS232 Connection to the CFG Port

For DB9 Connection to Module’s Port

Two Adapters, DB9 Female to Screw Terminal. For
RS422 or RS485 Connections to Port 1 and 2 of the
Module

Contains sample programs, utilities and
documentation for the MVI56-DH485R module.

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

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User Manual DH485 Interface Module for Remote Chassis

1.3 Install ProSoft Configuration Builder Software

You must install the ProSoft Configuration Builder (PCB) software in order to
configure the module. You can always get the newest version of ProSoft
Configuration Builder from the ProSoft Technology web site.

To install ProSoft Configuration Builder from the ProSoft Web Site

1 Open your web browser and navigate to http://www.prosoft-

technology.com/pcb

2 Click the D

Configuration Builder.

3 Choose "S
4 Save the file to your Windows Desktop, so that you can find it easily when

you have finished downloading.

5 When the download is complete, locate and open the file, and then follow the

instructions on your screen to install the program.

If you do not have access to the Internet, you can install ProSoft Configuration
Builder from the ProSoft Solutions CD-ROM, included in the package with your
module.

To install ProSoft Configuration Builder from the Product CD-ROM

1 Insert the ProSoft Solutions Product CD-ROM into the CD-ROM drive of your

PC. Wait for the startup screen to appear.

2 On the startup screen, click P

Windows Explorer file tree window.

3 Click to open the U

and files you will need to set up and configure your module.

4 Double-click the S

"PCB_*.

software on your PC. The information represented by the "*" character in the
file name is the PCB version number and, therefore, subject to change as
new versions of PCB are released.

OWNLOAD HERE link to download the latest version of ProSoft

AVE" or "SAVE FILE" when prompted.

RODUCT DOCUMENTATION. This action opens an

TILITIES folder. This folder contains all of the applications

ETUPCONFIGURATIONTOOL folder, double-click the

EXE" file and follow the instructions on your screen to install the

Note: Many of the configuration and maintenance procedures use files and other utilities on the
CD-ROM. You may wish to copy the files from the Utilities folder on the CD-ROM to a convenient
location on your hard drive.

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1.4 Setting Jumpers

Changing from RS-232 to RS-485 requires that you change the jumper on the
module to the appropriate settings. To do so, use a pair of needle-nose pliers to
move the jumper shunt to the appropriate pins as shown in the following diagram:

Note: The RS-422 jumper setting shown in the diagram is not used with this module configuration.

The Setup Jumper acts as "write protection" for the module’s flash memory. In
"write protected" mode, the Setup pins are not connected, and the module’s
firmware cannot be overwritten. Do not jumper the Setup pins together unless
you are directed to do so by ProSoft Technical Support.

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User Manual DH485 Interface Module for Remote Chassis

1.5 Install the Module in the Rack

If you have not already installed and configured your ControlLogix processor and
power supply, please do so before installing the MVI56-DH485R module. Refer
to your Rockwell Automation product documentation for installation instructions.

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

After you have checked the placement of the jumpers, insert MVI56-DH485R into
the ControlLogix chassis. Use the same technique recommended by Rockwell
Automation to remove and install ControlLogix modules.

Warning: When you insert or remove the module while backplane power is on, an electrical arc
can occur. This could cause an explosion in hazardous location installations. Verify that power is
removed or the area is non-hazardous before proceeding. Repeated electrical arcing causes
excessive wear to contacts on both the module and its mating connector. Worn contacts may
create electrical resistance that can affect module operation.

1 Turn power OFF.
2 Align the module with the top and bottom guides, and slide it into the rack

until the module is firmly against the backplane connector.

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

in the locking holes of the rack.

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5 Make a note of the slot location. You must identify the slot in which the

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

6 Turn power ON.

Note: If you insert the module improperly, the system may stop working, or may behave
unpredictably.
Note: If you are installing MVI56-DH485R with other modules connected to the PCI bus, the
peripheral modules will not have holding clips. Make sure all of the modules are aligned with their
respective slots before you snap them into place.

1.6 Connect your PC to the ControlLogix Processor

There are several ways to establish communication between your PC and the
ControlLogix processor. The following steps show how to establish
communication through the serial interface. Refer to your Rockwell Automation
documentation for information on other connection methods.

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

communications port.

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

computer.

1.7 Download the Sample Program to the Processor

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

1 If you are not already online with the processor, open the COMMUNICATIONS

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

2 When communication is established, RSLogix will open a confirmation dialog

box. Click the D

OWNLOAD button to transfer the sample program to the

processor.

3 RSLogix will compile the program and transfer it to the processor. This

process may take a few minutes.

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

dialog box. If the keyswitch is in the REM position, click OK
processor from P

ROGRAM mode to RUN mode.

to switch the

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

1.7.1 Configuring the RSLinx Driver for the PC COM Port

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

1 Open RSL
2 Open the C

INX.

OMMUNICATIONS menu, and choose CONFIGURE DRIVERS.

This action opens the C

ONFIGURE DRIVERS dialog box.

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User Manual DH485 Interface Module for Remote Chassis

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

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

C

ONFIGURE ALLEN-BRADLEY DF1 COMMUNICATIONS DEVICE dialog box.

4 Click the A

UTO-CONFIGURE button. RSLinx will attempt to configure your

serial port to work with the selected driver.

5 When you see the message A

UTO CONFIGURATION SUCCESSFUL, click the OK

button to dismiss the dialog box.

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

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1.8 Connect your PC to the Module

With the module securely mounted, connect your PC to the
Configuration/Debug port using an RJ45-DB-9 Serial Adapter Cable and a Null
Modem Cable.

1 Attach both cables as shown.
2 Insert the RJ45 cable connector into the Configuration/Debug port of the

module.

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

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Module Configuration MVI56-DH485R ♦ ControlLogix Platform User Manual DH485 Interface Module for Remote Chassis

2 Module Configuration

In This Chapter

 Using ProSoft Configuration Builder...................................................... 19



[Module].................................................................................................24

 [DH485 Port x].......................................................................................26



[DH485 Port x Commands]....................................................................29

 [DH485 Port x Maps] .............................................................................32



Download the Project to the Module...................................................... 34

This section contains the setup procedure, data, and ladder logic for successful
application of the MVI56-DH485R module. Each step in the setup procedure is
defined in order to simplify the use of the module.

2.1 Using ProSoft Configuration Builder

ProSoft Configuration Builder (PCB) provides a quick and easy way to manage
module configuration files customized to meet your application needs. PCB is not
only a powerful solution for new configuration files, but also allows you to import
information from previously installed (known working) configurations to new
projects.

2.1.1 Set Up the Project

To begin, start PROSOFT CONFIGURATION BUILDER (PCB).

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If you have used other Windows configuration tools before, you will find the
screen layout familiar. PCB’s window consists of a tree view on the left, and an
information pane and a configuration pane on the right side of the window. When
you first start PCB, the tree view consists of folders for D

EFAULT LOCATION, with a DEFAULT MODULE in the Default Location folder. The

D

EFAULT PROJECT and

following illustration shows the PCB window with a new project.

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Module Configuration MVI56-DH485R ♦ ControlLogix Platform
User Manual DH485 Interface Module for Remote Chassis

Your first task is to add the MVI56-DH485R module to the project.

1 Use the mouse to select D

EFAULT MODULE in the tree view, and then click the

right mouse button to open a shortcut menu.

2 On the shortcut menu, choose C

HOOSE MODULE TYPE. This action opens the

CHOOSE MODULE TYPE dialog box.

3 In the P

S
OK

RODUCT LINE FILTER area of the dialog box, select MVI56. In the

ELECT MODULE TYPE dropdown list, select MVI56-DH485R, and then click

to save your settings and return to the ProSoft Configuration Builder

window.

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2.1.2 Set Module Parameters

The next task is to configure module parameters. Notice that the contents of the
information pane and the configuration pane changed when you added the
MVI56-DH485R module to the project.

At this time, you may wish to rename the "Default Project" and "Default Location"
folders in the tree view.

To rename an object:

1 Select the object, and then click the right mouse button to open a shortcut

menu. From the shortcut menu, choose R

ENAME.

2 Type the name to assign to the object.
3 Click away from the object to save the new name.

Configuring Module Parameters

1 Click on the plus sign next to the
2 Double-click the

icon to open the EDIT dialog box.

icon to expand module information.

3 To edit a parameter, select the parameter in the left pane and make your

changes in the right pane.

4 Click OK

to save your changes.

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User Manual DH485 Interface Module for Remote Chassis

Comment Entries

1 Click the plus sign to the left of the

icon to expand the module

Comments.

2 Double-click the

icon. The EDIT - MODULE COMMENT dialog

appears.

3 Enter your comment and click OK to save your changes.

Printing a Configuration File

1 Select the M

ODULE icon, and then click the right mouse button to open a

shortcut menu.

2 On the shortcut menu, choose V

V

IEW CONFIGURATION window.

3 On the V

P

RINT. This action opens the PRINT dialog box.

4 On the P

IEW CONFIGURATION window, open the FILE menu, and choose

RINT dialog box, choose the printer to use from the dropdown list,

IEW CONFIGURATION. This action opens the

select printing options, and then click OK.

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2.2 [Module]

This section provides the module with a unique name, identifies the method of
failure for the communications for the module if the PLC is not in run, and
describes how to initialize the module upon startup.

The following example shows a sample [Module] section:

Modify each of the parameters based on the needs of your application.

2.2.1 Module Name

0 to 80 characters
This parameter 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.

2.2.2 Error / Status Pointer

-1 to 3999
Starting register location in virtual database for the error/status table. If a value of

-1 is entered, the error/status data will not be placed in the database. All other
valid values determine the starting location of the data. This data area includes
the module version information.

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User Manual DH485 Interface Module for Remote Chassis

2.2.3 Read Register Start

Range 0 to 3999
This parameter specifies the starting register in the module where data will be

transferred from the module to the processor. Valid range for this parameter is 0
to 3999.

2.2.4 Read Register Count

Range 0 to 3999
This parameter specifies the number of registers to be transferred from the

module to the processor. Valid entry for this parameter is 0 to 3999.

2.2.5 Write Register Start

0 to 3999
This parameter specifies the starting register in the module where the data will be

transferred from the processor to the module.

2.2.6 Write Register Count

Range 0 to 3999
This parameter specifies the number of registers to transfer from the processor to

the module. Valid entry for this parameter is 0 to 3999.

2.2.7 Initialize Output Data

Yes or No
This parameter determines if the output data for the module should be initialized

with values from the processor. If the value is set to No (0), the output data will
be initialized to 0. If the value is set to Yes (1), the data will be initialized with
data from the processor. Use of this option requires associated ladder logic to
pass the data from the processor to the module.

2.2.8 Failure Flag Count

0 through 65535
This parameter specifies the number of successive transfer errors that must

occur before halting communication on the application port(s). If the parameter is
set to 0, the application port(s) will continue to operate under all conditions. If the
value is set larger than 0 (1 to 65535), communications will cease if the specified
number of failures occur.

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2.3 [DH485 Port x]

General configuration information for the specified DH-485 port on the module

2.3.1 Baud Rate

Range 1200 to 19200
This is the baud rate to use for the DH485R network. Select one of the listed

baud rates.

2.3.2 Node Address

Range 0 to 31
This is the node address to be utilized by the DH-485 driver for this port on the

network. Enter a value not already used on the network in the range of 0 to 31. If
a value of 255 is utilized or set by the module, the port is disabled. Note: All
nodes on the network should be set to the lowest set of values in the range of 1
to 4).

2.3.3 Maximum Node Address

Range 0 to 31
Enter the maximum address that the initiator searches for before wrapping to

zero. The default is 31. This parameter should be set to the maximum node
address set in the DH-485 network.

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2.3.4 Token Hold Factor

Range 0 to 31
Enter the number of transmissions (plus retries) that a node holding a token can

send onto the data link each time that it receives the token. Enter a value
between 0 and 31. The default is 1.

2.3.5 Response Timeout

Range 1 to 50
This parameter sets the number of 100 millisecond time intervals to wait for a

response to a request from the module. If the module does not receive the
response with in the time period specified, a timeout condition will be set for the
command.

2.3.6 Status DB Offset

Range -1 to 3980
This parameter sets the location of the status data for the port in the module’s

internal database. If the parameter is set to -1, the data is not placed in the
database. If a valid value is entered, the module’s status data will be placed in
the database starting at the location indicated.

2.3.7 Command Error DB Offset

Range -1 to 3900
This parameter sets the location of the command error list data for the port in the

module's internal database. If the parameter is set to -1, the data is not placed in
the database. If a valid value is entered, the module's error list data will be placed
in the database starting at the location indicated.

2.3.8 CIF Read DB Offset

Range -1 to 7500 (Only even values)
This parameter sets the starting byte location in the module's database where the

CIF file Read will be placed. This data is passed from CIF memory area to the
set location in the module's database. If this parameter is set to -1, no CIF read
data will be utilized. When the CIF Read Area is disabled (CIF Read DB Offset =

-1) or CIF Read Count = 0, the Debug menu shows this parameter as 65535.

2.3.9 CIF Read Count

Range 0 to 242
This parameters sets the number of bytes to transfer from the CIF file to the

database. The CIF write count will be calculated as (244 - CIF Read Count)

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2.3.10 CIF Write DB Offset

Range -1 to 7500 (Only even values)
This parameter sets the starting byte location in the module's database where the

CIF file Write data will be read from. This data is passed to the CIF memory area
from the set location in the module's database. If this parameter is set to -1, no
CIF write data will be utilized. When the CIF Write Area is disabled (CIF Write DB
Offset = -1) or CIF Write Count = 0, the Debug menu shows this parameter as

65535.

2.3.11 First File

Range 0 to 255
This parameter sets the file number for the first file to be emulated by the

module.

2.3.12 File Size

Range 1 to 1000
This parameter sets the word size of all the files emulated in the module

2.3.13 File Offset

Range 1 to 999
This parameter sets the word offset into the module’s database where the file

emulation will start.

2.3.14 Min Command Delay

Range 0 to 10000
This parameter sets the minimum number of milliseconds to wait before issuing

each command. This parameter is utilized to keep the network from being
flooded with requests from the module.

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Module Configuration MVI56-DH485R ♦ ControlLogix Platform
User Manual DH485 Interface Module for Remote Chassis

2.4 [DH485 Port x Commands]

The [DH485 Port x Commands] section for each port defines the commands to
be issued by the module to other devices on the network. These commands can
be used for data collection and/or control.

2.4.1 Command List Overview

In order to interface the MVI56-DH485R module to act as a master device, you
must construct a command list for each port. The commands in the list specify
the node 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 command list supports up to 100
commands. The command list is processed from top (command #0) to bottom. A
poll interval parameter is associated with each command to specify a minimum
delay time in seconds between the issuance of a command. If the user specifies
a value of 10 for the parameter, the command will be executed no more
frequently than every 10 seconds.

Write commands have a special feature, as they can be set to execute only if the
data in the write command changes. If the register data values in the command
have not changed since the command was last issued, the command will not be
executed. If the data in the command has changed since the command was last
issued, the command will be executed. Use of this feature can lighten the load on
the network. In order to implement this feature; set the enable code for the
command to a value of 2.

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2.4.2 Command Entry Format

Each command entered in the command list section has the same format. The
following is an example section for Port 0:

The first part of each record in the section relates to the module interface and the
last part relates to the node to be interfaced with. The following topics describe
each field required for a user command

2.4.3 Enable Type Code

This field defines if the command is enabled and when it should be executed.
The following codes are recognized by the application:

0 = Command is disabled
1 = Command is executed at the polling interval specified
2 = The write command is only executed when data changes

2.4.4 Database Start Address

This field defines the starting address in the module’s internal database to
associate with the command. This field can have a value from 0 to 3999. The
address supplied is a word address in the database.

2.4.5 Element Count

This field defines the number of elements to be used with the command. If the
command is interfacing with CIF data, this parameter represents a byte count.
For data file access, the data size utilized depends on the file type used.

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