PLC Programming

4.

Field Devices and Instrumentation

4.1.

Input Field Devices

4.1.1.

Manual Input Devices

4.1.1.1.

Push Button Switches

4.1.1.2.

Selector Switches

4.1.1.3.

4.1.2.

Position Sensing Devices

4.1.2.1.

4.1.2.1.1.

Mechanical Limit Switches

4.1.2.1.2.

Magnetic Limit Switches

4.1.2.2.

Proximity Sensors

4.1.2.2.1.

Inductive Proximity Sensors

4.1.2.2.2.

Capacitive Proximity Sensors

4.1.2.2.3.

Magnetic Proximity Sensors

4.1.2.3.

Photoelectric Sensors

4.1.2.3.1.

Through-Beam Sensors

4.1.2.3.2.

Retroreflective Sensors

4.1.2.3.3.

Diffuse Sensors

4.1.2.3.4.

Fiber Optic Sensors

4.1.3.

Motion and Position Feedback Devices

4.1.3.1.

Rotary Encoders

4.1.3.1.1.

Incremental Encoders

4.1.3.1.2.

Absolute Encoders

4.1.3.2.

Linear Encoders

4.1.3.3.

4.1.4.

Process Measurement Devices

4.1.4.1.

Pressure Transmitters

4.1.4.2.

Temperature Sensors

4.1.4.3.

4.1.4.4.

4.2.

Output Field Devices

4.2.1.

Visual Indication Devices

4.2.1.1.

Indicator Lights

4.2.1.2.

4.2.1.3.

Seven-Segment Displays

4.2.2.

Actuators and Control Devices

4.2.2.1.

Solenoid Valves

4.2.2.2.

Pneumatic Actuators

4.2.2.3.

Hydraulic Actuators

4.2.3.

Motor Control Devices

4.2.3.1.

4.2.3.2.

4.2.3.3.

Variable Frequency Drives

4.2.3.4.

4.2.3.5.

Stepper Motor Drives

4.2.4.

Process Control Devices

4.2.4.1.

4.2.4.2.

4.2.4.3.

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3. PLC Hardware Architecture and Components

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5. PLC Programming Software and Development Environment