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ECT 464

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ECT 464 Lecture 2b PLC Selection PLC Selection Criteria PC or PLC? Number of I/O (memory also) Type of I/O Functions (PID, Recipes, Data Storage) Programming Language ... – PowerPoint PPT presentation

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Title: ECT 464


1
ECT 464
  • Lecture 2b
  • PLC Selection

2
PLC Selection Criteria
  • PC or PLC?
  • Number of I/O (memory also)
  • Type of I/O
  • Functions (PID, Recipes, Data Storage)
  • Programming Language
  • Redundancy
  • Safety
  • Standardization
  • Price
  • Reputation

3
PLC Initial System Selection
  • 40 extra space
  • Fixed vs. Variable
  • DC vs. AC
  • Local vs. Multipoint
  • Special Function
  • Operator Interface
  • Documentation
  • 70 input 30 output

4
Advantages of DC vs. AC
  • Smaller Wires
  • Less Insulation
  • Smaller Conduit
  • Smaller Switches
  • Safety
  • Smaller Connectors

5
of I/O
  • Nano 8-32 MicroLogix
  • Micro 32-250 CompactLogix
  • Small 250-4k ControlLogix
  • Medium 2k-16k Momentum (Mod)
  • Large 8k-32k Quantum (Mod)
  • Very Large gt32k PLC-5

6
Type of I/O
  • Remote I/O
  • Networking
  • Expandability
  • Specialized I/O
  • High Speed Counters
  • Motion Control (PID)
  • Basic
  • Communications
  • TTL Digital I/O
  • RTD
  • Thermocouple

7
Programming Language
  • Ladder Logic
  • Function Block Diagram
  • Structured Text
  • Instruction List
  • Sequential Function Chart

8
Next Class
  • Basic Ladder Logic
  • Input/Output Logic and Wiring
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