Programmable Controllers Flashcards
___ modules in a modular PLC provide the link between the PLC and external devices, which measure process conditions.
A) Input
B) Output
A) Input
The MicroLogix™ 1000 controller manufactured by Allen Bradley is a stand-alone controller and all inputs and outputs (I/O), both discrete and analog, can be connected to the main chassis of the controller.
A) True
B) False
A) True
A PLC is an industrial ___ designed to control manufacturing machines and systems.
A) computer
B) relay
C) starter
D) timer
A) computer
During each operating cycle, the controller examines the status of output devices, executes the user program, and changes outputs accordingly.
A) True
B) False
B) False
The two classifications of industrial electrical systems that PLCs are used to control are discrete parts manufacturing and process manufacturing.
A) True
B) False
A) True
A(n) ___ is a command that will cause a PLC to perform a certain predetermined operation.
A) address
B) instruction
C) relay
B) instruction
The PLC ___ is a printed circuit board that delivers power to the modules and provides a data bus for exchanging the data between the modules and the CPU.
A) backplane
B) rack
A) backplane
In a fixed and modular PLC, ___ interfaces provide the link between the PLC and external devices such as switches and sensors.
A) input
B) output
A) input
Modular PLCs are built by selecting components that fulfill the requirements for the control application and installing them into the rack or chassis.
A) True
B) False
A) True
A programmable logic ___ is a solid state device, which contains discrete DC and AC input interfaces and discrete DC and AC output interfaces.
A) computer
B) relay
C) starter
D) timer
B) relay
