Komprehensif PLC S7 300

OBJECTIVE
 Be able to recognize S7 hardware and be able to replace modules when a fault occurs
 Be able to operate the Step 7 software to make it perform certain tasks
 Understand basic S7 instruction set and be able to make minor modifications to software
 Be able to backup and restore a PLC program when required
 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
   

METHOD
 Presentation
 Discussion
 Case study