Training Online – Komprehensif PLC S7 300

DESCRIPTION

1. Be able to recognize S7 hardware and be able to replace modules when a fault occurs
2. Be able to operate the Step 7 software to make it perform certain tasks
3. Understand basic S7 instruction set and be able to make minor modifications to software
4. Be able to backup and restore a PLC program when required
5. Be able to perform basic system diagnostics when a problem occurs

COURSE OUTLINE

1. How Exactly Does A PLC Work?

• The Led on the Output Card Means I am Getting Voltage Out Right? Does It?
• What Exactly Happens in Between? There’s More than Just a Program in the CPU
• How Exactly Does It Scan the Program?
• What is this Watchdog Timer? Is it that Important?
• Can I Use the Same Output Twice? That’s Bad Programming Isn’t It?
• A PLC is a Logic Controller, so Use a Logical Approach to Fault Find It
• What are the 8 Simple Test Points to Check?
• The PLC is in RUN, that Means There’s a Program Right? Does It?
• FORCING a Bit and Toggling a Bit is Pretty Much the Same Yeah? Depends on which PLC

2. How Do I Do the Following?

• How do I Check Power is ON and PLC is in Right Mode (RUN or Program)
• Check for a Fault Condition (is SF LED ON)
• Establish a Link to the PLC (Accessible Nodes)
• If Comms Problem Check PG/PC Interface
• Create a Blank Project and Take a Backup
• Open Project for PLC and Go on Line
• Interrogate Diagnostics Buffer
• Identify if it is a Hardware or Software Fault?
• Change the Battery
• Change Modules if Necessary (With Spares and Without Spares)
• Identify if it is a PLC or Comms Fault (Profibus or MPI)
• Check all Settings Against a Template, Node Address etc
• Check Hardware Configuration
• Clear Memory and Download Program
• Check Software Against Latest Copy (Compare Function)
• Monitor Program
• Searching for Specific Operands and Instructions
• Changing Timer, Counter Values on Line
• Making Minor Mods Off Line and on Line
• Check or Create a VAT Table to Establish Parameter Status
• Force a Parameter if Required
• Call Up Reference Data to Assist with Software Diagnostics
• Archive and Retrieve Project
• Display Documentation (Symbols and Comments)
• Reassign an I/O Address and Change Software Addresses (Rewire Function)
• Printing Cross Reference/Program Listings etc

3. Background Information Also Covered

4. Understanding of the Following:

• Number Formats, Bits, Bytes, Words, Double Words
• Binary, HEX, Octal, Floating Point, Integer
• Data Types and Parameter Types, Bool etc
• Block Types
• Variable Types (Local and Global)
• How to Monitor Various Blocks
• Ladder, STL Programs
• Basic Instructions, Contacts, Set, Reset etc
• Timers, Counters
• Comparators, Maths
• How to Make Minor Mods
• Altering Values in a VAT Table
• Back Tracking Through a Program to Establish Where Power Flow Stops
• Overall Reset Procedure
• Fault Finding Tips

5. Course Equipment Per Delegate

• S7 300 or 400 PLC
• PC or Laptop
• Simulator

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