Intertech Modicon Quantum/984 PLC Intermediate II Programming & Troubleshooting

Intertech Modicon Quantum Education Manual or
Intertech Modicon 984 Education Manual
Hands-on lab exercises relating to your facility's operations

Modicon Quantum/984 Programmable Logic Controllers
Intertech Universal Simulator/Test Panel

The Intermediate II course emphasizes the bit level instructions and places the functionality of these instructions at your command.

Register data can be viewed as numerical information, or it can be viewed as binary bits (as series of on/off signals). Clever programmers use this functionality to create very powerful "shorthand" programs. With the matrix and move function blocks you can create functional programs that would take numerous lines of ladder logic to accomplish the same result. Programs using bit level functions deal with multiplexing, sorting, shift-registers, first-in/first-out (FIFO) functions, fault diagnostics, etc. These programs rely on a combination of math, register manipulations, and bit level manipulations.

In order to troubleshoot these systems, you must understand how the various bit level function blocks operate on the bits within registers. Once you understand the bit operations, you can put together this information with the register manipulation operations and the relay operations to come up with a complete understanding of the programmable controller, and therefore have the basis for troubleshooting the programmable controller in its entirety.