Industrial Electrical Technician Courses
Programmable Logic Controllers
The class introduces common industry Programmable Logic Controllers (PLC) applications using lab exercises to simulate real world automated machinery control. NTT uses Allen Bradley Controllers and Allen Bradley RSLogix500 software. Students will learn how PLCs can control machines and how hardwired systems can be upgraded to PLC controlled systems. Topics covered include data memory, scanning, introduction to programming, relay instructions, software navigating and documenting program correctly. In addition, timers, counters, registers and register type instructions will be reviewed in this class. Analog systems will be introduced.
Course Overview
PLC Architecture
- Rack, power supply, processor, I/O
- Smart modules
- Communication networks
- Programming tool—software
- I/O interfaces - voltages
- Data transfer from module to processor
- Number of I/O per module
- Analog data vs. digital data
- Sizing system requirements
- Ladder diagrams vs. ladder logic
- Sensor and load connections to the PLC
- Rungs and instructions
- Configuring communications
- Debugging and diagnostic tools
- Examine if open/closed
- Output energize, output latch/unlatch
- Differences between instructions and field devices (on/off vs. open/closed)
- I/O address relation to module location
- Data memory—integer binary
- Register memory vs. bit-wise memory
- I/O, memory and rung scan process
- On-delay/off-delay timers, control bits
- Counters and control bits
- Moving data
- Math instructions
- Comparison instructions
- Motor start/stop circuits
- Trapping random faults, signaling alarms
- Tank-level controls
- Sequence-controlled conveyors
- Batch control processes
- Troubleshooting communication problems
Total Hours: 32 (50% Lab)
