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Allen-Bradley ControlLogix 1756-DH485 User Manual Download Page 26

Publication 1756-UM532A-EN-P - May 2006

2-8

        Overview of the DH-485 Network

Example System 
Configuration

Below is an example of a DH-485 network.

Example DH-485 Network System Configuration

Personal Computer

1747-AIC

SLC 500 20-Point Fixed 
Controller with 2-Slot 
Expansion Chassis

SLC 500 Fixed Controller

1747-AIC

ControlLogix Controller and 1756-DH485 
Communications Module

1747-AIC

SLC 5/01 Modular Controller

DH-485 Network

max. length 1219 m (4,000 ft)

Data Table 
Access 
Module

SLC 500 20-Point 
Fixed Controller

1747-AIC

1761-NET-AIC
Advanced Interface 
Converter

SLC 5/02 Modular Controller

1747-AIC 
Isolated 
Link 
Coupler

1747-UIC 
Interface 
Converter

Personal Computer

SLC 5/03, 5/04, or 5/05 

Modular Controller

1761-NET-AIC

PanelView

44138

Summary of Contents for ControlLogix 1756-DH485

Page 1: ...ControlLogix DH 485 Communication Module 1756 DH485 User Manual...

Page 2: ...escribed in this manual Reproduction of the contents of this manual in whole or in part without written permission of Rockwell Automation Inc is prohibited Throughout this manual when necessary we use...

Page 3: ...1 9 Chapter 2 Overview of the DH 485 Network Introduction 2 1 DH 485 Network Description 2 1 DH 485 Network Protocol 2 2 DH 485 Token Rotation 2 2 DH 485 Network Initialization 2 2 Devices that Use t...

Page 4: ...n 3 13 Use the Common Industrial Protocol CIP Messaging 3 14 Chapter 4 Use RSLinx Software to Create a Routing Table Introduction 4 1 Choose the Correct Software 4 1 Use RSLinx Software to Create a Ro...

Page 5: ...ssage in RSLogix 500 6 10 Configure the Message 6 11 Chapter 7 Communicate Between a PLC 5 Controller and a Remote SLC 5 03 Controller over Multiple DH 485 Networks Introduction 7 1 Hardware Configura...

Page 6: ...ppendix A Specifications Appendix B Troubleshoot the 1756 DH485 Module Introduction B 1 Check Power Supply and Module Status B 1 Interpret the LED Status Indicators B 2 Interpret the Alphanumeric Indi...

Page 7: ...to send DH 485 messages between ControlLogix PLC and SLC controllers in DH 485 applications Who Should Use This Manual Use this manual if you program applications that use 1756 DH485 modules We assume...

Page 8: ...Publication 1756 UM532A EN P May 2006 Preface ii Notes...

Page 9: ...etworks in one module Common Industrial Protocol CIP Messaging Module Requirements The following are required for using the 1756 DH485 communication module RSLinx Software version 2 41 or later Node a...

Page 10: ...n be removed and inserted under power without disrupting power to other modules in the chassis 4 character display Default Controller Slot feature for local messaging Serial Port Configuration No limi...

Page 11: ...tatus Indicator Door Label ATTENTION This equipment is sensitive to electrostatic discharge which can cause internal damage and affect normal operation Follow these guidelines when you handle this equ...

Page 12: ...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 Be sure that power is removed or the area...

Page 13: ...485 networks together for inter network communications for example messages between SLC 5 03 controllers provide connection to other NetLinx networks such as EtherNet IP to allow a single point acces...

Page 14: ...view display Allow communications between legacy and ControlLogix systems for high integration of control systems except for fixed SLC controllers Phase SLC systems into ControlLogix architecture by u...

Page 15: ...Logix and SLC 500 controllers on DH 485 from NetLinx network by using RSLinx Classic software PanelView Standard terminals on DH 485 from NetLinx network by using RSLinx Classic Logix controllers mess...

Page 16: ...s devices such as ControlLogix PLC and SLC controllers exchange information With the 1756 DH485 module you may exchange information between the ControlLogix PLC or SLC controllers on different network...

Page 17: ...address 7 Channel A status 8 Channel B and the network used for channel 9 Channel B node address 10 Channel B status This sequence runs continuously during normal module operation Refer to Appendix B...

Page 18: ...Publication 1756 UM532A EN P May 2006 1 10 1756 DH485 Module Overview Notes...

Page 19: ...erconnection of 32 devices multi master capability token passing access control the ability to add or remove nodes without disrupting the network maximum network length of 1219 m 4000 ft 1 For See DH...

Page 20: ...o 31 The allowable address range for all responders is 1 to 31 There must be at least one initiator on the network DH 485 Network Initialization Network initialization begins when a period of inactivi...

Page 21: ...coupler provides a 6 position removable terminal block for connection to the DH 485 communication cable 1747 UM011 1761 NET AIC Advanced Interface Converter Standalone Provides a communication link b...

Page 22: ...ion between the communications cable and the attached SLC 500 controller and peripheral devices 2707 L8P1 1 2707 L8P2 1 2707 L40P1 1 2707 L40P2 1 2707 V40P1 1 2707 V40P2 1 2707 V40P2N 1 2707 M232P3 1...

Page 23: ...ances greater than 1 8 m 6 ft up to a maximum of 1219 m 4000 ft Below is an example of a remote connection between a computer running your programming software and an SLC 500 controller Remote Connect...

Page 24: ...atch the baud rate filter of the AIC to the network baud rate This switch does not change the network baud rate and is normally left in the AUTO position In high noise environments the baud rate selec...

Page 25: ...protocol and electrical signal is the 1747 KE module Refer to the Isolation Interface Converter AIC User Manual publication 1761 UM004 for complete information 1747 UIC USB to DH 485 Interface Conver...

Page 26: ...Chassis SLC 500 Fixed Controller 1747 AIC ControlLogix Controller and 1756 DH485 Communications Module 1747 AIC SLC 5 01 Modular Controller DH 485 Network max length 1219 m 4 000 ft Data Table Access...

Page 27: ...s to a DH 485 network using the 1747 CP3 cable and a 1761 NET AIC Advanced Interface Converter AIC In this case the AIC must be powered with 24V dc The 1746 P1 P2 P4 P5 and P6 power supplies provide 2...

Page 28: ...iderations You need to decide the length of the communication cable where you will route it and how to protect it from the environment where it will be installed Before you install the communication c...

Page 29: ...reater than 20A but only up to 100k VA and 0 30 m 1 ft from lines of 100k VA or more Running the communication cable through conduit provides extra protection from physical damage and electrical inter...

Page 30: ...k considerations and describe ways to select parameters for optimum network performance speed Number of Nodes The number of nodes on the network directly affects the data transfer time between nodes U...

Page 31: ...n it can be useful to leave a temporary device such as a personal computer connected if there is only one such device A solicit successor packet requires the same transmission time as the token pass b...

Page 32: ...Publication 1756 UM532A EN P May 2006 2 14 Overview of the DH 485 Network Notes...

Page 33: ...wire used for a network is called the network medium A DH 485 link transfers data between ControlLogix controllers SLC controllers and other devices that use the DH 485 network These devices are call...

Page 34: ...to install a DH 485 network refer to publication 1747 UM011 SLC 500 Modular Hardware Style User Manual Two Methods of Communication Over a DH 485 Network The 1756 DH485 module acts as a bridge for tw...

Page 35: ...e page 3 3 Remote DH 485 Messaging See page 3 5 Before you can design a control system to meet your application needs be aware of the difference between Local DH 485 Messaging and Remote DH 485 Messag...

Page 36: ...sage cannot identify where to send the message The 1756 DH485 module uses the Controller Slot configuration parameter in RSLinx software to send the message to the local controller Local DH 485 messag...

Page 37: ...network Remote DH 485 Messaging Devices use remote DH 485 messaging to communicate between devices on physically separate networks A device that uses remote DH 485 messaging must be able to generate...

Page 38: ...node 030 Remote DH 485 Messaging Between SLC 5 03 Controller A and SLC 5 03 Controller B Link IDs To use remote DH 485 messaging each network that is an originating network or target network must hav...

Page 39: ...odes located on separate networks By using the routing table the 1756 DH485 module lets existing devices such as an SLC controller to use DH 485 Remote Addressing for messaging You must use RSLinx sof...

Page 40: ...ontrolLogix chassis backplane may also be assigned link IDs assign DH 485 node numbers use RSLinx software to load routing tables into each 1756 DH485 module When using remote DH 485 messaging you mus...

Page 41: ...g Respond to Local DH 485 Initiate Local DH 485 Respond to Remote DH 485 Initiate Remote DH 485 MicroLogix 1000 Yes Yes Yes No MicroLogix 1100 Yes Yes Yes Yes MicroLogix 1200 Yes Yes Yes Yes MicroLogi...

Page 42: ...connections when it receives DH 485 message traffic The 1756 DH485 module recovers connections if they are not being used Because of the various paths involved the 1756 DH485 module responds to out o...

Page 43: ...the module This information must be applied to the module s configuration separately from other information Use RSLinx to apply the routing table For more information about routing tables see the sect...

Page 44: ...three things happen The SLC 5 03 controller refuses the message because the buffers are full The originator detects an application timeout when no reply is received The originator increments its error...

Page 45: ...IMPORTANT Some devices in this figure have the same node number because they are on different networks Devices on the same network must have unique node numbers You must assign the node numbers DH485...

Page 46: ...thod to route messages than DH 485 messaging CIP uses a relative path concept for routing messaging Because the message itself or the connection the message is sent on contains all the information req...

Page 47: ...hat products you are using with the 1756 DH485 module The table below explains what software is needed for your application For See Choose the Correct Software 4 1 Use RSLinx Software to Create a Rout...

Page 48: ...d node addresses The routing table translates link IDs and node address information into path or routing information Thus the routing table specifies a map to other links in the system Routing tables...

Page 49: ...for your application follow these steps 1 Start RSLinx 2 Browse the network 3 Right click on the 1756 DH485 module 4 Use the left side navigation bar to see your DH 485 application as shown in the ex...

Page 50: ...a Routing Table 5 Select the DH 485 Routing Table tab You must build the routing table based on the 1756 DH485 modules in the ControlLogix chassis Each link ID for example chassis backplane channels...

Page 51: ...le 4 5 6 You must assign link IDs as shown below A Right click on the 1756 DH485 module B Click Edit Module C Assign Link IDs and click OK IMPORTANT Keep track of your Link ID assignments You need the...

Page 52: ...Publication 1756 UM532A EN P May 2006 4 6 Use RSLinx Software to Create a Routing Table The 1756 DH485 routing table displays with the link IDs defined...

Page 53: ...ting Table 4 7 7 Assign a Link ID for the chassis backplane 8 Click OK The software prompts you to download routing table changes 9 Click Yes This completes the routing table creation process A Right...

Page 54: ...ogix controller with this feature No routing table is required The controller slot is the physical location of a ControlLogix controller in a DH 485 application The default setting is slot 0 If necess...

Page 55: ...module to a 1756 Lx controller For See Hardware Configuration 5 2 Use the Controller Slot to Route the Local Message 5 3 Create a Local Message in RSLogix 500 5 4 Configure the Message 5 5 Create a Lo...

Page 56: ...communications are initiated by an SLC 5 03 controller The message is sent to a 1756 DH485 module and the 1756 Lx controller is located in slot 11 Communications Between an SLC 5 03 Controller and a...

Page 57: ...etwork 5 3 Use the Controller Slot to Route the Local Message When a local DH485 message is received the message will automatically be routed to the controller based on the configured slot number In t...

Page 58: ...A EN P May 2006 5 4 Communicate from an SLC 5 03 Controller to a Logix Controller over a DH 485 Network Create a Local Message in RSLogix 500 This is an example of a local message being initiated by t...

Page 59: ...Publication 1756 UM532A EN P May 2006 Communicate from an SLC 5 03 Controller to a Logix Controller over a DH 485 Network 5 5 Configure the Message This is the Setup dialog for the example message...

Page 60: ...roller over a DH 485 Network Create a Logic Map for the Local Message in RSLogix 5000 Software You must logically map the SLC data address to the ControlLogix tag To get to the Logix Map in RSLogix 50...

Page 61: ...Routing Table in RSLinx Software 6 3 Create a Message in RSLogix 500 6 6 Configure the Message 6 7 SLC 5 03 Controller Sends a Remote Message 6 8 Hardware Configuration 6 8 Create the Routing Table in...

Page 62: ...3 controller The SLC 5 04 controller is on a DH network 1 The SLC 5 04 controller connects to Channel B on the 1756 DHRIO module 2 The SLC 5 03 controller connects to Channel A of the 1756 DH485 modul...

Page 63: ...ler is node 10 octal SLC 5 04 controller connects to a 1756 DHRIO module at node 56 octal or 46 decimal connection is on Channel B of the 1756 DHRIO SLC 5 04 controller sends a remote message to the S...

Page 64: ...ers over DH and DH485 Networks Configure the SLC 5 03 Controller Channel 1 Link ID The SLC 5 03 remote link ID needs to be programmed to match the link IDs configured into the 1756 DH485 module These...

Page 65: ...over DH and DH485 Networks 6 5 Configure the SLC 5 04 Channel 1 Link ID The SLC 5 04 controller remote link ID needs to be programmed to match the link IDs configured into the 1756 DH485 module These...

Page 66: ...6 UM532A EN P May 2006 6 6 Communicate Between SLC Controllers over DH and DH485 Networks Create a Message in RSLogix 500 This is the message for the example configuration Click Setup Screen to config...

Page 67: ...ge This is the Setup dialog for the example message The SLC 5 04 controller connects to a 1756 DHRIO module at node 56 octal or 46 decimal The SLC 5 04 controller sends a remote message to the SLC 5 0...

Page 68: ...C 5 03 controller connects to Channel A on the 1756 DH485 module 2 The SLC 5 04 controller is connected to Channel B of the 1756 DHRIO module in the same rack as the 1756 DH485 module 3 The SLC 5 04 c...

Page 69: ...el A of the 1756 DH485 module The 1756 DH485 node address on the DH 485 network is node 0 1756 DHRIO and the 1756 DH485 modules are on the same backplane 1756 DH485 module is in slot 14 1756 DHRIO mod...

Page 70: ...N P May 2006 6 10 Communicate Between SLC Controllers over DH and DH485 Networks Create a Remote Message in RSLogix 500 This is the example message for the hardware configuration Click on Setup Screen...

Page 71: ...ntrollers over DH and DH485 Networks 6 11 Configure the Message This is the Setup Screen for the example message In this example the SLC 5 03 controller is connected to Channel A of the 1756 DH485 mod...

Page 72: ...Publication 1756 UM532A EN P May 2006 6 12 Communicate Between SLC Controllers over DH and DH485 Networks Notes...

Page 73: ...emote PLC 5 controller to send a message to a remote SLC 5 03 controller over multiple DH 485 Networks For See Hardware Configuration 7 4 Create a Message in RSLogix 5 7 4 Configure the Message 7 5 Cr...

Page 74: ...he PLC 5 controller is connected to channel A on a 1756 DHRIO module located at node 12 2 The 1756 DHRIO is on the same backplane as the 1756 DH485 module and is located in slot 8 of the chassis 3 The...

Page 75: ...ler and a Remote SLC 5 03 Controller over Multiple DH 485 Networks 7 3 Create the Routing Table These are the routing tables for the message in the example configuration This is the routing table for...

Page 76: ...e SLC 5 03 Controller over Multiple DH 485 Networks Configure the PLC 5 DH Channel 1A Link ID The PLC 5 DH Channel 1A Link ID needs to be configured This is an example of the channel properties Create...

Page 77: ...M532A EN P May 2006 Communicate Between a PLC 5 Controller and a Remote SLC 5 03 Controller over Multiple DH 485 Networks 7 5 Configure the Message This is the Setup dialog for the message in the exam...

Page 78: ...Publication 1756 UM532A EN P May 2006 7 6 Communicate Between a PLC 5 Controller and a Remote SLC 5 03 Controller over Multiple DH 485 Networks Notes...

Page 79: ...controller to an SLC 5 03 controller over an EtherNet IP network For See Hardware Configuration 8 2 Create a Message in RSLogix 500 8 3 Configure the Message 8 4 Review the Multihop Feature in RSLogi...

Page 80: ...nitiates a message 1 The message is sent over an EtherNet IP network to a 1756 ENBT module 2 The message is then sent over the backplane to a 1756 DH485 module 3 The 1756 DH485 module then sends the m...

Page 81: ...n SLC 5 05 Controller to an SLC 5 03 Controller over an EtherNet IP Network 8 3 Create a Message in RSLogix 500 This is the message for the example configuration Click on Setup Screen to configure the...

Page 82: ...r minimum firmware revisions needed for the SLC 5 05 controller to communicate to a 1756 ENBT controller The SLC 5 05 controller needs to be at a minimum Series A 0S501 Firmware 5 In this example the...

Page 83: ...oller to an SLC 5 03 Controller over an EtherNet IP Network 8 5 Review the Multihop Feature in RSLogix 500 The multihop feature of RSLogix 500 takes care of routing this remote message No routing tabl...

Page 84: ...Publication 1756 UM532A EN P May 2006 8 6 Communicate from an SLC 5 05 Controller to an SLC 5 03 Controller over an EtherNet IP Network Notes...

Page 85: ...55 controller to an SLC 5 03 controller through DH and DH485 networks For See Hardware Configuration 9 2 Create a Message in RSLogix 5000 9 3 Configure the Message 9 4 IMPORTANT The examples use the 1...

Page 86: ...4 The SLC 5 03 controller receives the message 6 DH 485 network communicates through link couplers 5 44066 1756 DHRIO 1 DH Network AIC AIC The communication path goes from the local 1756 DHRIO module...

Page 87: ...ation 1756 UM532A EN P May 2006 Communicate to a SLC 5 03 Controller on a DH 485 Network 9 3 Create a Message in RSLogix 5000 This is the message for the example configuration Click to configure the m...

Page 88: ...is in the 1756 L55 controller Path Item Description dhrio_ser_B When you browse to the local 1756 DHRIO module appears if you have it configured in the I O configuration tree in RSLogix 5000 software...

Page 89: ...munication from a Logix controller to an SLC controller over an EtherNet IP network For See Hardware Configuration 10 2 Create a Remote 1756 ENBT Message in RSLogix 5000 10 3 Configure the Message 10...

Page 90: ...5 03 controller over EtherNet IP The 1756 ENBT module 1 to communicate to a remote 1756 ENBT module 2 over the EtherNet IP network backplane The 1756 DH485 module 3 then communicates through Channel...

Page 91: ...e from a Logix Controller to an SLC 5 03 Controller over EtherNet IP and DH 485 Networks 10 3 CreateaRemote1756 ENBT Message in RSLogix 5000 This is an example remote 1756 ENBT message Click the butto...

Page 92: ...therNet IP and DH 485 Networks Configure the Message This dialog shows example values on the Configuration tab for the remote message Message Type SLC Typed Write Source Element interger_slc_dh485 20...

Page 93: ...ane to slot 5 where the 1756 ENBT named Series_A is located Series A is defined as backplane 1 slot 5 2 EtherNet IP port 100 100 100 7 The remote 1756 ENBT 1 Go to the backplane of the remote 1756 cha...

Page 94: ...Publication 1756 UM532A EN P May 2006 10 6 Communicate from a Logix Controller to an SLC 5 03 Controller over EtherNet IP and DH 485 Networks Notes...

Page 95: ...ue Operational Temperature IEC 60068 2 1 Test Ad Operating Cold IEC 60068 2 2 Test Bd Operating Dry Heat IEC 60068 2 14 Test Nb Operating Thermal Shock 0 60 C 32 140 F Storage Temperature IEC 60068 2...

Page 96: ...ations when product is marked 1 c UL us UL Listed for Class I Division 2 Group A B C D Hazardous Locations certified for U S and Canada See UL File E194810 CE European Union 89 336 EEC EMC Directive c...

Page 97: ...e address Channel A status Channel B and the network used for channel B Channel B node address Channel B status This channel sequences run continuously during normal module operation Module OK status...

Page 98: ...ly Status is Recommended Action Off Not operating Turn power ON Check power wiring connections Check fuse On Operating None normal operation Module OK Indicator Module Status Recommended Action Off No...

Page 99: ...e second intervals This table summarizes the codes Alphanumeric Display Descriptions Message Description Recommended Action ONLY NODE Only node on DH 485 link Check the cables OFF LINE DH 485 link is...

Page 100: ...atus of D0 hex A PLC 5 controller displays this error as D000 hex when monitoring the message instruction If you receive this error message take the following actions Check your message instruction to...

Page 101: ...rror message take the following actions Check your message instruction to make sure a valid local node destination link ID and destination node were entered Check your routing table in each 1756 DH485...

Page 102: ...Publication 1756 UM532A EN P May 2006 B 6 Troubleshoot the 1756 DH485 Module Notes...

Page 103: ...85 module 1 1 3 2 3 14 configuration controller slot 4 8 Data Highway 485 DH 485 messaging 3 11 controller slot set 4 8 use to route a local message 5 3 D Data Highway 485 DH 485 3 1 definition 3 1 Da...

Page 104: ...moval and insertion under power RIUP 1 4 routing errors in local Data Highway 485 DH 485 messaging B 4 in remote Data Highway 485 DH 485 messaging B 5 routing limitations for messages sent via the 175...

Page 105: ...500 4 1 RSLogix 5000 4 1 Specifications 1756 DH485 module A 1 environmental conditions A 1 status indicators for use in troubleshooting B 4 system configuration example 2 8 T troubleshoot B 1 B 5 powe...

Page 106: ...Publication 1756 UM532A EN P May 2006 iv Index Notes...

Page 107: ...ss all necessary information is provided 1 2 3 Can we add more information to help you procedure step illustration feature example guideline other explanation definition Technical Accuracy all provide...

Page 108: ...NECESSARY IF MAILED IN THE UNITED STATES BUSINESS REPLY MAIL FIRST CLASS MAIL PERMIT NO 18235 CLEVELAND OH POSTAGE WILL BE PAID BY THE ADDRESSEE 1 ALLEN BRADLEY DR MAYFIELD HEIGHTS OH 44124 9705 PLEA...

Page 109: ......

Page 110: ...mation com Installation Assistance If you experience a problem with a hardware module within the first 24 hours of installation please review the information that s contained in this manual You can al...

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