Copyright © 2002 Delmar Thomson Learning Chapter 14 Documenting Your PLC System
Copyright © 2002 Delmar Thomson Learning Objectives Explain what is contained in a system documentation package. Describe why a system documentation package should be developed. State when the documentation package is usually developed.
Copyright © 2002 Delmar Thomson Learning Objectives (cont’d.) List what documentation features the typical PLC software development package offers. Explain the value of documentation during troubleshooting. Describe the value of documentation if you have to expand the present system.
Copyright © 2002 Delmar Thomson Learning Objectives (cont’d.) Explain what a rung description is. Describe a rung symbol and the advantage of using symbols. State the value of documentation during system start-up. Explain the value of documentation during an outside service person’s service call.
Copyright © 2002 Delmar Thomson Learning PLC System Documentation A documentation package is an orderly collection of information concerning the configuration and operation of your system. It is typically put together as system is designed.
Copyright © 2002 Delmar Thomson Learning PLC System Documentation Usage Installation Debugging Start-Up Maintenance Modification System duplication
Copyright © 2002 Delmar Thomson Learning Why Add Documentation to User Program? Assist installers to install and start up system. Help maintenance individuals troubleshoot and maintain system. Provide information to operators who must understand how system works.
Copyright © 2002 Delmar Thomson Learning Why Add Documentation to User Program? (cont’d.) Assist in answering system upgrade questions. Enable outside service people understand system for maintenance, servicing or upgrade. Allow easy reproduction of system.
Copyright © 2002 Delmar Thomson Learning What Should Be Included in Documentation Package? System overview Diagram of system configuration I/O address assignments Internal coil address assignments Data table assignments
Copyright © 2002 Delmar Thomson Learning What Should Be Included in Documentation Package? (cont’d.) Program printout Control program backup Wiring diagrams
Copyright © 2002 Delmar Thomson Learning Sample Diagram of System Configuration
Copyright © 2002 Delmar Thomson Learning Typical Wiring for a 120 VAC Input Module
Copyright © 2002 Delmar Thomson Learning Typical Wiring for a 120 VAC Output Module
Copyright © 2002 Delmar Thomson Learning Diagram of System Configuration
Copyright © 2002 Delmar Thomson Learning Seven-Slot Chassis with I/O Modules Assigned
Copyright © 2002 Delmar Thomson Learning Internal Bit Allocation Table
Copyright © 2002 Delmar Thomson Learning Timer Address Allocation Table
Copyright © 2002 Delmar Thomson Learning Integer File Allocation Table
Copyright © 2002 Delmar Thomson Learning Documentation and Software Packages PLC program development software provides readily available documentation features: Hard copy print out of all data and ladder files Cross-reference reports Hard copy of ladder rungs Memory usage Processor configuration data
Copyright © 2002 Delmar Thomson Learning Software Ladder Rung Documentation Software packages provide ladder rung documentation as program is developed. Rung documentation can be added later or modified by maintenance individuals.
Copyright © 2002 Delmar Thomson Learning Software Ladder Rung Documentation (cont’d.) Software packages ladder rung documentation: Page titles Rung comments Instruction symbols Instruction descriptions Instruction comments
Copyright © 2002 Delmar Thomson Learning RSLogix 500 Ladder Documentation