PLC 1B Flashcards
(16 cards)
Function block, ladder logic, structured text, and sequential flow chart are all examples of which of the following:
PLC programming languages
PLC Master Control in an emergency shuts off the following
All Main power to Input and Outputs only
An internal control relay:
does not directly control an output device
_____________________ are text-based names given to reserved processor memory locations and are used to store information about conditions both internal and external to the controller.
Tags
In a PLC system, there is an electrical connection between the field I/O devices and the CPU.
Always False
Moving the key switch from RUN mode or REM mode to PROGRAM mode and back to REM will return the controller to RUN mode.
True or False?
False
The status bit of the light shown in the drawing of this output module is controlled by the:
processor, as it determines the user program
The name of this layout diagram is a (an):
Relay schematic
In a PLC wiring circuit, the DC input module amd DC output module should be wired as:
the input module is a sourcing module, and the output can be either a sinking module or a sourcing module
Which of the following is NOT an advantage of a relay type PLC output?
The output circuit has a great life expectancy than a triac type output
Volatile memory elements can be classified as those that:
do not retain stored information when the power is removed
In a 16-bit signed integer, the right-most bit represents the sign of the binary value.
T/F
True
Scan time is usually referred to as the time it takes to scan:
The ladder logic program and update the I/Os
True or False?
If the Sign Bit is true, the Integer value is always negative
True
I am the most common type of memory used to store, back-up or transfer PLC programs. Who am I?
Flash
______________ modules provide the wiring terminal and associated circuitry that enables a programmable controller to sense the state of condition of a machine or application
Input
