Allen-Bradley PLC-5 User Manual

Publication 1785-UM012D-EN-P - July 2005
1-8 Understanding Your Programmable Controller
PLC-5/40L and -5/60L Controller Front Panels
Channel 0 is optically-coupled (provides high electrical noise immunity) and can be used with most RS-422A
equipment as long as:
termination resistors are not used
the distance and transmission rate are reduced to comply with RS-423 requirements
Configure these 3-pin ports for:
remote I/O scanner,
remote I/O adapter,
DH+ communication
unused
channel 1B communication port; its default
configuration is remote I/O scanner
Use this port with ASCII or DF1 full-duplex, half-duplex
master, and half-duplex slave protocols. The port's
default configuration supports controler programming:
channel 0*25-pin D-shell serial port; supports standard
EIA RS-232C and RS-423 and is RS-422A compatible
one stop-bit
BCC error check
no handshaking
DF1 point-to-point
2400 bps
no parity
battery indicator (red when the battery is low)
controller RUN/FAULT indicator (green when
running; red when faulted)
force indicator (amber when I/O forces
are enabled)
channel 0 communication status indicator
(green when the channel is communicating)
Install memory module here
Use these labels to write information about the
channel: communication mode, station addresses etc.
Install battery here
channel 1B status indicator (lights green and red)
PLC-5 family member designation
keyswitch; selects controller mode
channel 1A communication port; its default
configuration is DH+ communication
8-pin mini-DIN, DH+ programming terminal
connection parallel to channel 1A
channel 2 communication port; a 50-pin,
dedicated extended-local I/O port
channel 1A status indicator
(lights green and red)
channel 2 extended-local I/O status indicator
(green when functioning normally; red when
not functioning)
2
1
2
2
1

Allen-Bradley PLC-5 Specifications

General

Programming Software	RSLogix 5
Programming Languages	Ladder Logic
Power Supply	120/240V AC or 24V DC
Communication Ports	DH+, Remote I/O, Ethernet/IP, ControlNet
Operating Temperature	0 to 60°C (32 to 140°F)
Relative Humidity	5 to 95% non-condensing
Memory	Up to 64K words (user program and data)

Summary

Preface

Manual Overview

Outlines the manual's three main sections: Design, Operate, and Maintain.

Chapter 1 Understanding Your Programmable Controller

Lay Out the System

Guides on determining network configuration and component placement for PLC-5 systems.

Programming Features

Highlights the programming features of a PLC-5 controller, including ladder logic and SFCs.

Chapter 2 Selecting and Placing I/O

Selecting I/O Modules

Guides on selecting I/O modules to interface with machines and processes.

Chapter 3 Placing System Hardware

Determining the Proper Environment

Details acceptable environmental conditions for controller placement.

Grounding Your System

Provides information on proper grounding guidelines for system hardware.

Chapter 4 Addressing I/O and Controller Memory

I/O Addressing Concept

Explains how controller memory segments are used to address I/O terminals.

Assigning Racks

Details how chassis size and addressing mode determine the number of I/O racks.

Chapter 6 Communicating with Remote I/O

Designing a Remote I/O Link

Outlines steps and guidelines for designing a remote I/O link.

Chapter 8 Communicating with Extended-Local I/O

Configuring the Controller as an Extended-Local I/O Scanner

Guides on configuring channel 2 for extended-local I/O as a scanner.

Chapter 10 Communicating with Devices on a Serial Link

Configuring Channel 0

Explains how to configure channel 0 for DF1 point-to-point, master, slave, or user mode.

Chapter 11 Communicating with Devices on an Ethernet Network

Configuring Channel 2 for Ethernet Communication

Guides on configuring channel 2 for Ethernet communication using manual or BOOTP methods.

Using Advanced Ethernet Functions

Explains advanced functions like broadcast address, subnet masks, and gateways.

Chapter 12 Protecting Your Programs

Passwords and Privileges

Explains how passwords and privileges restrict access to controller files and functions.

Chapter 13 Programming Considerations

Forcing

Explains how to turn input/output bits on/off for testing purposes.

Extended Forcing

Describes how to force discrete I/O, analog I/O, and block-transfer data words.

Chapter 15 Preparing Fault Routines

Understanding the Fault Routine Concept

Explains how fault routines execute when a major fault is encountered.

Monitoring Faults

Describes how to monitor controller faults using the status screen.

Appendix F Troubleshooting

PLC-5 controller

Lists general problems for PLC-5 controllers, probable causes, and recommended actions.

Extended-Local I/O system

Offers troubleshooting guidance for the 1771-ALX adapter module.

Appendix G Cable Reference

Channel 0 Pin Assignments

Shows pin assignments for channel 0 (RS-port) for different serial communication modes.

Ethernet Cable Connections

Describes Ethernet cable connections and transceiver specifications.