Exam 24: Programmable Logic Controllers

One example of a program control instruction is _____.

Instruction List (IL) is a low-level program best suited for small applications and fast execution.

Which PLC language is a BASIC style language?

A(n) ____ output module will produce output signals that are either 0 to 10 VDC or 4 to 20 milliamperes.

The five programming languages for PLCs are Ladder Diagram, Function Block Diagram, Instruction List, Sequential Function Chart, and Structured Graphic.

___ coil is a nonretentive coil used to perform a latch function.

The Function Block Diagram is a ____ language.

Digital input modules are available for DC inputs, AC inputs, or a mix.

____ timers will retain their timed value during a loss of power.

A PLC will treat all input and output sources the same; they will be looked upon as a ____.

One big advantage of using point-to-point wiring of relay controls over a PLC is that the wiring is greatly simplified and reduced.

Down-counters perform a counting function when the associated input element transitions from a(n) ____ to a(n) ____ state.

____ coils revert to their de-energized state whenever the PLC is cycled from stop to run or whenever the power is cycled.

____ timers perform a timing function while receiving power. The state of the associated contact(s) does not change until the timer has timed out.

Most PLCs consist of an assortment of modules (input and output), a CPU, a power supply, and a rack in which to mount the modules.