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Allen-Bradley MicroLogix 1100 User Manual

Allen-Bradley MicroLogix 1100
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Publication 1763-UM001E-EN-P - June 2015
Connecting to Networks via RS-232/RS-485 Interface 205
DH-485 Communication
Protocol
The DH-485 protocol defines the communication between multiple devices
that coexist on a single pair of wires. DH-485 protocol uses RS-485
Half-Duplex as its physical interface. (RS-485 is a definition of electrical
characteristics; it is not a protocol.) RS-485 uses devices that are capable of
co-existing on a common data circuit, thus allowing data to be easily shared
between devices.
The DH-485 network offers:
interconnection of 32 devices
multi-master (peer-to-peer) capability
token passing access control
the ability to add or remove nodes without disrupting the network
maximum network segment of 1,219 m (4,000 ft.)
The DH-485 protocol supports two classes of devices: initiators and
responders. All initiators on the network get a chance to initiate message
transfers. To determine which initiator has the right to transmit, a token
passing algorithm is used.
Control of message transfers on the DH-485 network is performed by rotating
the token along the nodes on the network. A node holding the token can send
a message onto the network. Each node is allowed a fixed number of
transmissions (based on the Token Hold Factor) each time it receives the
token. After a node sends a message, it passes the token to the next device.
The allowable range of node addresses is 1 to 31. There must be at least one
initiator on the network (such as a MicroLogix controller, or an SLC 5/02 or
later processor).
DH-485 Configuration Parameters
When MicroLogix communications are configured for DH-485, the following
parameters can be changed:
See Software Considerations on page 208 for tips on setting the parameters
listed above.
DF1 Full-Duplex Configuration Parameters
Parameter Options
Baud Rate 9600, 19.2K
Node Address 1 to 31 decimal
Token Hold Factor 1 to 4

Table of Contents

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Allen-Bradley MicroLogix 1100 Specifications

General IconGeneral
Processor32-bit
Programming SoftwareRSLogix 500
MountingDIN rail or panel mount
Power Supply24V DC
TypeCompact PLC
Digital Inputs12
Digital Outputs8
Analog Inputs4 (depending on model)
Analog OutputsOptional with expansion module
Programming LanguageLadder Logic
Operating Temperature0 to 55 °C (32 to 131 °F)
SeriesMicroLogix

Summary

Important User Information

Summary of Changes

Firmware Revision History

Lists changes and updates to firmware in the manual.

Preface

Who Should Use this Manual

Identifies the intended audience for the manual.

Purpose of this Manual

Explains the manual's scope and objectives.

Related Documentation

Lists other relevant Rockwell Automation publications.

Common Techniques Used in this Manual

Explains document conventions and symbols used in the manual.

Chapter 1 Hardware Overview

Hardware Features

Details the physical components and features of the controller.

Component Descriptions

Provides descriptions of key controller components like memory modules and clocks.

Communication Cables

Lists specific communication cables required for controller applications.

Programming

Outlines the software and version requirements for programming the controller.

Communication Options

Describes the available communication ports and protocols for the controller.

Chapter 2 Installing Your Controller

Agency Certifications

Lists the safety and compliance certifications for the controller.

Compliance to European Union Directives

States compliance with EU directives and CE marking.

EMC Directive

Details compliance with Electromagnetic Compatibility directives.

Low Voltage Directive

Details compliance with Low Voltage directives.

Installation Considerations

Provides guidelines for proper controller installation in industrial environments.

Safety Considerations

Highlights important safety practices during controller installation.

Hazardous Location Considerations

Specifies suitability and warnings for hazardous location installations.

Chapter 3 Wiring Your Controller

Wiring Requirements

Outlines general requirements and recommendations for controller wiring.

Wiring the Terminal Block

Explains the procedure for wiring terminal blocks on the controller.

Using Surge Suppressors

Describes the use of surge suppressors to protect output contacts from inductive loads.

Grounding the Controller

Details grounding procedures for noise reduction and safety.

Wiring Diagrams

Illustrates various wiring configurations for controllers and expansion I/O.

Terminal Block Layouts

Shows the terminal layout for different controller models.

Terminal Groupings

Explains how terminals are grouped for input and output wiring.

Sinking and Sourcing Wiring Diagrams

Illustrates sinking and sourcing configurations for DC inputs.

Controller I/O Wiring

Discusses general I/O wiring practices, including minimizing electrical noise.

Wiring Your Analog Channels

Provides guidelines for wiring analog input channels.

Expansion I/O Wiring

Illustrates digital expansion I/O wiring diagrams.

Chapter 4 Communication Connections

Supported Communication Protocols

Lists the communication protocols supported by the controller's ports.

Default Communication Configuration

Details the default communication settings for Channel 0.

Using the Communications Toggle Functionality

Explains how to switch between user-defined and default communication modes.

Connecting to the RS-232 Port

Describes methods for connecting to the controller via the RS-232 port.

Connecting to DH-485 network

Explains how to connect the controller to a DH-485 network.

Connecting to AIC+

Details how to connect an AIC+ for DH-485 networking.

Connecting to Ethernet

Describes how to connect the controller to an Ethernet network.

Appendix F Connecting to Networks via Ethernet Interface

MicroLogix 1100 Controllers and Ethernet Communication

Introduces Ethernet communication for MicroLogix 1100 controllers.

MicroLogix 1100 Performance Considerations

Discusses factors affecting Ethernet communication performance.

Ethernet Network Topology

Illustrates typical Ethernet network setups.

Connecting an Ethernet switch on the Ethernet Network

Guides on connecting an Ethernet switch to the controller.

Cables

Lists types of Ethernet cables and their wiring for straight-through connections.

Ethernet Connections

Explains TCP/IP and Ethernet/IP protocols for establishing connections.

Chapter 5 Using the LCD

LCD and Keypad

Identifies the LCD screen and keypad buttons on the controller.

Operating Principles

Explains the menu structure and navigation flow of the controller's LCD.

Startup Screen

Describes the default and customizable startup screens displayed on the LCD.

Main Menu and Default Screen

Presents the main menu options available on the controller's LCD.

Main Menu Items

Details the functions and corresponding page references for each main menu item.

Operating Buttons

Explains the function of each button on the LCD keypad.

Using Menus to Choose Values

Guides on navigating menus and selecting values using the keypad.

Selecting Between Menu Items

Describes how to navigate and select items within the LCD menus.

Setting Values

Details how to change values for parameters using the LCD keypad.

I/O Status

Shows how to view the status of controller and expansion I/O on the LCD.

Viewing I/O Status

Provides steps to navigate to and view the I/O status screen.

Monitoring Bit File

Explains how to view and change data values of bits in a user-defined file via the LCD.

Target Bit File Number (TBF)

Defines the TBF element for specifying the bit file to monitor on the LCD.

Monitoring Integer File

Explains how to view and change data values of integer files via the LCD.

Target Integer File Number (TIF)

Defines the TIF element for specifying the integer file to monitor on the LCD.

Using the Mode Switch

Explains how to use and change the controller's operating mode via the LCD.

Controller Modes

Lists the possible controller modes based on mode switch positions.

Changing Mode Switch Position

Details the procedure for changing the controller's mode switch position.

Using a User Defined LCD Screen

Guides on using custom LCD screens instead of default ones.

User Defined LCD Screen

Explains how to display user-defined screens implemented in the application.

Configuring Advanced Settings

Accesses sub-menu for advanced controller settings and configurations.

Key In Modes

Describes the two modes (Continuous, Discrete) for value entry.

Changing Key In Mode

Explains how to change the current Key In mode setting.

Using Communications Toggle Functionality

Explains the functionality to switch communication modes.

Viewing Ethernet Port Configuration

Shows how to view MAC and IP addresses of the controller's Ethernet port.

Using Trim Pots

Explains the operation and use of trimming potentiometers for data modification.

Trim Pot Operation

Details the functionality of trim pots for modifying integer data.

Changing Data Value of a Trim Pot

Guides on changing the data values for POT0 and POT1 trim pots.

Viewing System Information

Shows how to view controller catalog number, OS, and firmware revision.

Viewing Fault Code

Explains how to access and view fault codes displayed on the LCD.

Chapter 6 Using Real-Time Clock and Memory Modules

Real-Time Clock Operation

Details the operation of the controller's built-in real-time clock.

Operation at Power-up and Entering a Run or Test Mode

Explains how RTC values are written at power-up and mode changes.

Memory Module Operation

Covers features like program backup, compare, and protection for memory modules.

User Program, User Data and Recipe Back-up

Describes how the memory module facilitates program and data transfer.

Program Compare

Explains using the memory module for program security and comparison.

Data File Download Protection

Details the feature that protects user data from being overwritten during downloads.

Memory Module Write Protection

Explains the write-once, read-many behavior of the memory module.

Removal/Insertion Under Power

Describes the safety of installing or removing the memory module while the controller is powered.

Program /Data Download

Outlines the procedure for downloading programs from a memory module to the controller.

Program /Data Upload

Outlines the procedure for uploading programs from the controller to a memory module.

Chapter 7 Online Editing

Overview of Online Editing

Introduces the function of monitoring and modifying ladder programs online.

Online Editing Terms

Defines key terms used in the context of online editing.

Effects of Online Editing On Your System

Discusses the impact of online editing on system performance and memory.

System Impacts

Details how scan time and interrupt latency can be affected by online edits.

Data Table File Size

Notes limitations on changing data table sizes during online editing.

Online Edit Error

Describes potential errors and controller behavior during online editing sessions.

Directions and Cautions for MicroLogix 1100 Online Edit User

Provides essential guidance and warnings for users performing online edits.

A Download Before Starting Online Edit

Stresses the requirement of at least one download before initiating online edits.

Types of Online Editing

Explains the two types of online editing: Program and Runtime.

Appendix A Specifications

General Specifications

Lists general specifications like dimensions, weight, and power supply for controllers.

Digital Input Specifications

Details specifications for digital inputs across different controller models.

Analog Input Specifications

Lists specifications for analog inputs across various controller models.

Output Specifications For Ordinary (Non-Hazardous) Locations only - General

Provides output specifications for ordinary location applications.

Relay Contact Ratings

Lists make, break, and volt-ampere ratings for relay contacts.

BBB FET Output Specifications

Details specifications for FET outputs on specific controller models.

AC Input Filter Settings

Specifies filter settings for AC input modules.

High-Speed DC Input Filter Settings (Inputs 0 to 3)

Details filter settings for high-speed DC inputs.

Standard DC Input Filter Settings (Inputs 4 and higher)

Details filter settings for standard DC inputs.

Working Voltage (1763-L16AWA)

Specifies working voltage isolation tests for the 1763-L16AWA controller.

Working Voltage (1763-L16BWA)

Specifies working voltage isolation tests for the 1763-L16BWA controller.

Working Voltage (1763-L16BBB)

Specifies working voltage isolation tests for the 1763-L16BBB controller.

Working Voltage (1763-L16DWD)

Specifies working voltage isolation tests for the 1763-L16DWD controller.

Expansion I/O Specifications

Lists general specifications for expansion I/O modules.

Digital I/O Modules

Provides general specifications for digital I/O modules.

Input Specifications

Details input specifications for various I/O modules.

Output Specifications

Details output specifications for various I/O modules.

Appendix B Replacement Parts

MicroLogix 1100 Replacement Kits

Lists replacement parts and their catalog numbers for MicroLogix 1100.

Lithium Battery (1763-BA)

Details the installation procedure for the replaceable lithium battery.

Battery Handling

Provides safety guidelines for handling and operating lithium batteries.

Storage

Specifies recommended storage conditions for lithium batteries.

Transportation

Outlines regulations for shipping lithium batteries.

Disposal

Provides guidance on the proper disposal of lithium batteries.

Appendix C Troubleshooting Your System

Understanding the Controller Indicator Status

Explains the meaning of various controller status LEDs.

Controller Status LED Indicators

Details the location and indications of controller status LEDs.

Status Indicators on the LCD

Explains the status indicators displayed on the controller's LCD.

I/O Status Indicators on the LCD

Describes how I/O status is shown on the LCD screen.

Normal Operation

Describes the normal operating state indicated by the controller's LEDs.

Error Conditions

Lists potential errors indicated by controller LEDs and their probable causes.

Controller Error Recovery Model

Provides a flowchart for diagnosing and recovering from controller issues.

Analog Expansion I/O Diagnostics and Troubleshooting

Covers diagnostics and troubleshooting for analog expansion I/O modules.

Module Operation and Channel Operation

Explains module and channel level operations and internal diagnostics.

Power-up Diagnostics

Details the internal diagnostic tests performed by modules during power-up.

Critical and Non-Critical Errors

Differentiates between recoverable and unrecoverable module errors.

Module Error Definition Table

Defines the structure of module error data in Hex format.

Error Codes

Lists extended error codes for various I/O modules.

Calling Rockwell Automation for Assistance

Provides information on how to contact support for troubleshooting assistance.

Appendix D Using Control Flash to Upgrade Your Operating System

Preparing for Upgrade

Outlines prerequisites and steps before upgrading the controller's operating system.

Install ControlFlash Software

Guides on installing the ControlFlash software for OS upgrades.

Prepare the Controller for Updating

Details how to configure the controller for the OS update process.

Sequence of Operation

Describes the key events that occur during the operating system upgrade process.

Missing/Corrupt OS LED Pattern

Explains the LED pattern indicating a failed OS download or missing OS.

Appendix E Connecting to Networks via RS-232/RS-485 Interface

RS-232 Communication Interface

Describes the RS-232 interface and its use for serial communication.

RS-485 Communication Interface

Describes the RS-485 interface and its use in multidrop networks.

DF1 Full-Duplex Protocol

Explains the DF1 Full-Duplex protocol for point-to-point communication.

DF1 Half-Duplex Protocol

Details the DF1 Half-Duplex protocol for multi-drop networks.

DF1 Half-Duplex Operation

Explains how slave devices operate and communicate in DF1 Half-Duplex networks.

Considerations When Communicating as a DF1 Slave on a Multi-drop Link

Provides advice for slave devices communicating on multi-drop DF1 links.

Using Modems with MicroLogix™ Programmable Controllers

Discusses different types of modems usable with MicroLogix controllers.

DH-485 Communication Protocol

Explains the DH-485 protocol for device communication on a single pair of wires.

DH-485 Configuration Parameters

Lists configurable parameters for DH-485 communication.

Devices that use the DH-485 Network

Lists other devices that support the DH-485 network.

Important DH-485 Network Planning Considerations

Covers factors affecting DH-485 network performance and planning.

Example DH-485 Connections

Provides examples of how to connect controllers to a DH-485 network.

Modbus Communication Protocol

Explains the Modbus protocol for master-slave communication.

ASCII

Describes ASCII connection capabilities for various devices.

Appendix G System Loading and Heat Dissipation

System Loading Calculations

Explains how to calculate the electrical load of the control system.

System Loading Example Calculations

Provides examples for calculating current loading for expansion I/O.

Current Loading

Details the calculation of current consumption for expansion I/O modules.

Validating the System

Shows how to validate system configurations against allowable current and loading values.

Calculating Heat Dissipation

Provides a table and formulas to determine system heat dissipation for enclosure installation.

Glossary

address

Defines how memory locations are identified.

AIC+ Advanced Interface Converter

Defines the AIC+ device for communication links.

application

Defines machine monitoring/control and computer routine usage.

baud rate

Defines communication speed between devices.

bit

Defines the smallest memory storage location.

block diagrams

Defines a schematic drawing.

Boolean operators

Defines logical operators used in circuits and programs.

branch

Defines a parallel logic path in a ladder program.

communication scan

Defines a part of the controller's operating cycle for communication.

controller

Defines a device for monitoring inputs and controlling outputs.

controller overhead

Defines internal operating cycle portion for housekeeping.

control profile

Defines how a controller determines output conditions.

counter

Defines devices that count events.

CPU (Central Processing Unit)

Defines the controller's decision-making and data storage section.

data table

Defines processor memory containing I/O values and files.

DIN rail

Defines a standard metal railing for mounting.

download

Defines data transfer from a storage device to another.

DTE (Data Terminal Equipment)

Defines equipment attached to a network for data transmission.

embedded I/O

Defines the controller's on-board I/O.

EMI

Defines Electromagnetic Interference.

encoder

Defines devices transmitting position information or pulses.

executing mode

Defines run or test modes.

expansion I/O

Defines I/O connected via bus or cable.

false

Defines the status of an instruction not providing continuous logic path.

FIFO (First-In-First-Out)

Defines data order for entry and retrieval from a file.

file

Defines a collection of information organized into one group.

full-duplex

Defines bidirectional communication transmitting and receiving simultaneously.

half-duplex

Defines communication limited to one direction at a time.

hard disk

Defines storage area on a PC for files.

high byte

Defines bits 8 to 15 of a word.

input device

Defines devices supplying signals to controller input circuits.

inrush current

Defines temporary surge current when a device is energized.

instruction

Defines operation performed by the processor.

instruction set

Defines available general purpose instructions.

I/O (Inputs and Outputs)

Defines devices providing or receiving data from the controller.

jump

Defines altering program counter execution.

ladder logic

Defines program format resembling a ladder diagram.

least significant bit (LSB)

Defines the bit carrying the smallest weight value.

LED (Light Emitting Diode)

Defines status indicator for processor functions and I/O.

LIFO (Last-In-First-Out)

Defines data order for entry and retrieval from a file.

logic

Defines a process for solving complex problems using simple functions.

Master Control Relay (MCR)

Defines a mandatory hard-wired relay for emergency stops.

mnemonic

Defines a memorable term representing complex information.

modem

Defines equipment connecting data terminal equipment to a communication line.

modes

Defines selected methods of operation.

negative logic

Defines binary logic where "0" represents logic 1 voltage.

network

Defines connected stations (nodes) on a communication medium.

nominal input current

Defines current at nominal input voltage.

normally closed

Defines contacts closed when relay is de-energized.

normally open

Defines contacts open when relay is de-energized.

off-delay time

Defines time for controller logic to recognize signal removal.

offline

Describes devices not under direct communication.

offset

Defines steady-state deviation of a controlled variable.

off-state leakage current

Defines minimal current flow when a switch is open.

on-delay time

Defines time for controller logic to recognize signal presentation.

one-shot

Defines a programming technique for setting a bit for one scan.

online

Describes devices under direct communication.

operating voltage

Defines voltage range for input 'On' state or output allowable range.

output device

Defines a device controlled by the controller.

processor

Defines the Central Processing Unit (CPU).

processor file

Defines program and data files used by the controller.

program file

Defines the area containing ladder logic program.

program mode

Defines controller state when not executing file and outputs are de-energized.

program scan

Defines controller's operating cycle for executing ladder program.

programming device

Defines executable package for developing ladder diagrams.

protocol

Defines information packaging for network transmission.

read

Defines acquiring data from a storage place.

relay

Defines an electrically operated device for switching circuits.

relay logic

Defines program or logic representation for relays.

restore

Defines downloading a program from PC to controller.

reserved bit

Defines status file location for user not to read or write.

retentive data

Defines data preserved through power cycles.

RS-232

Defines EIA standard for serial communication.

RS-232 communication interface

Defines EIA standard for serial communication.

run mode

Defines controller executing mode.

rung

Defines a part of ladder logic containing input/output instructions.

save

Defines uploading a program from controller to PC or saving to hard disk.

scan time

Defines time for controller to execute program instructions.

sinking

Defines current flow path to ground or negative power supply side.

sinking and sourcing wiring diagrams

Illustrates sinking and sourcing configurations for DC inputs.

sourcing

Defines current flow path to source or positive power supply side.

specifications

Lists general specifications for I/O modules.

status

Defines condition of a circuit or system.

surge suppressors

Lists surge suppressors for contactors, motor starters, and relays.

system configuration

Defines parameters for DF1 Full-Duplex and DH485 connections.

system loading

Provides calculations for system loading and limitations.

terminal

Defines a point on an I/O module for wiring devices.

terminal block layouts

Shows the terminal layout for different controller models.

terminal groupings

Explains how terminals are grouped for input and output wiring.

throughput

Defines time between input turning on and corresponding output turning on.

Trim Pot Information Function File

Details configuration of trim pots within the LCD Function File.

trim pot operation

Details the functionality of trim pots for modifying integer data.

trim pots

Explains the operation and use of trimming potentiometers for data modification.

true

Defines instruction status providing continuous logical path.

upload

Defines data transfer to a programming device from another device.

using communications toggle functionality

Explains the functionality to switch communication modes.

using communications toggle push button

Explains the functionality to switch communication modes.

using emergency-stop switches

Provides guidance on the use and wiring of emergency-stop switches.

using memory modules

Covers operation, backup, and security features of memory modules.

using real-time clock

Details the operation and accuracy of the controller's real-time clock.

using trim pots

Explains the operation and use of trimming potentiometers for data modification.

workspace

Defines main storage for programs and data.

write

Defines copying data to a storage device.

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