Allen-Bradley MicroLogix 1200 User Manual

Publication 1762-UM001D-EN-P - March 2004
Table of Contents iv
Power-up Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Critical and Non-Critical Errors . . . . . . . . . . . . . . . . . . . C-5
Module Error Definition Table . . . . . . . . . . . . . . . . . . . C-5
Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7
Calling Rockwell Automation for Assistance . . . . . . . . . . . . C-8
Appendix D
Using Control Flash to Upgrade
Your Operating System
Preparing for Upgrade. . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
Install ControlFlash Software . . . . . . . . . . . . . . . . . . . . D-1
Prepare the Controller for Updating . . . . . . . . . . . . . . . D-2
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
Missing/Corrupt OS LED Pattern . . . . . . . . . . . . . . . . . . . . D-2
Appendix E
Connecting to Networks via
RS-232 Interface
RS-232 Communication Interface . . . . . . . . . . . . . . . . . . . . E-1
DF1 Full-Duplex Protocol . . . . . . . . . . . . . . . . . . . . . . . . . E-1
DF1 Half-Duplex Protocol . . . . . . . . . . . . . . . . . . . . . . . . . E-2
Using Modems with MicroLogix 1200 Programmable
Controllers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-3
DH-485 Communication Protocol. . . . . . . . . . . . . . . . . . . . E-5
Devices that use the DH-485 Network . . . . . . . . . . . . . E-5
Important DH-485 Network Planning Considerations. . . E-6
Example DH-485 Connections . . . . . . . . . . . . . . . . . . . E-9
Modbus Communication Protocol . . . . . . . . . . . . . . . . . . E-12
ASCII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-12
Appendix F
System Loading and Heat
Dissipation
System Loading Limitations . . . . . . . . . . . . . . . . . . . . . . . . F-1
System Loading Example Calculations (24-Point Controller) .
F-1
System Loading Worksheet . . . . . . . . . . . . . . . . . . . . . . . . F-3
Current Loading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4
System Loading Example Calculations (40-Point Controller) .
F-5
System Loading Worksheet . . . . . . . . . . . . . . . . . . . . . . . . F-7
Current Loading. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7
Calculating Heat Dissipation . . . . . . . . . . . . . . . . . . . . . . . F-9
Glossary
Index
Rockwell Automation Support . . . . . . . . . . . . . . . . . . . . . . 1-9
Installation Assistance . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
New Product Satisfaction Return. . . . . . . . . . . . . . . . . . 1-9

Allen-Bradley MicroLogix 1200 Specifications

General

Series	MicroLogix 1200
Type	Programmable Logic Controller (PLC)
Mounting	DIN rail or panel mount
Programming Language	Ladder Logic
Programming Software	RSLogix 500
I/O Points	Up to 40
Communication Ports	RS-232, RS-485
Memory	6 KB user memory
Power Supply	24V DC or 120/240V AC
Expansion	Supports expansion I/O modules
Operating Temperature	0°C to 55°C (32°F to 131°F)
Dimensions	90 mm x 110 mm
Weight	0.5 kg (1.1 lbs)