plc
Less noisy
One of the following is not the disadvantage of electromechanical relays.
Programable Peripheral Interface
PPI is an acronym for.
External processing Unit
A PLC contains all of the following components except.
analog
a thermocouple input to a PLC is considered as ______ I/O
Transformer
The input module has all the following components except.
Address decoder unit.
The _______ ensures that only one device is communicating with the microprocessor at any given moment.
Data Communication (DCE)
The _______ respond to the messages transmitted by the data terminal equipment (DTE)
Data Terminal Equipment (DTE)
The ________ initiates communication by sending messages
least significant bit (LSB)
the binary digit to the far right hand side of the number is called the _____
quotient
the number of times the diviser can be subtracted from the dividend is called the____
Parity check
A _______ check is used to find transmission errors.
1111001011101001
convert hexadecimal F2E9 to binary
Central processing unit
CPU is an acronym for
False
CPU of a plc is the heart of the system
A Process control computer.
A PLC is most appropriately defined as.
Address decoder
A microprocessor unit uses a _____ to enable ROM RAM i/o port devices and support chips.
Exit Status
One of the following is not a section of system memory
Location status
One of the following is not a section of system memory (2)
Requires major wiring
One of the following is not the benefit of PLCs over electromechanical relay logic systems.
Internal Flip Flop
SRAM uses a ______ to hold a data bit
Full and half duplex
Two types of DF1 communications are ___________ and _______.
Ultraviolet Erasable Programable ROM
UVEPROM is an acronym for?
Electrically erasable programable ROM
EEPROM is the acronym for?
two way
Full duplex DF1 allows for ______ communications between two devices.
255
Half duplex DF1 allows for communications in one direction at a time in a network of up to _____ devices.
fractional
Which type of number has weights that are negative powers of ten (10 )
Sinking
a sourcing output device must be connected to a _______ output module port.
expandability
environmental consideration during the selection of a PLC include all of the following except
Fixed PLC
for the ______, the processor, power supply, I/O modules are all in one housing
modular PLC
for the _______, the housing consists of a power supply in chassis with several slots
grey code
in the ____ system only one digit changes state
binary decoded decimal
in the _____ system each 4 bits of binary
Robotics and configurations
one of the following factors is the least important consideration when selecting a PLC
false
compatibility is not a big issue when selecting anew PLC
2F7F
convert binary 001011110111 1111 to hexadecimal
517
convert binary number 10100111 to octal number
10000010
convert hexadecimal 82 to binary
22.3125
convert the fractional binary number 10110.0101 to decimal
23.46875
convert the fractional binary number 10111.01111 to decimal
10111101
subtract binary number 110011 from 11110000
output port 0 in the PLC module 2
the instruction with address O:2/0 represents the PLC output port ____ in the PLC module ____.
11111
what is the binary representation of 31
11
what is the binary representation of 39?
110100
what is the binary representation of 52?
real
which type of number has weights that are both positive and negative powers of ten (10)
integer
which type of number has weights that are positive powers of ten (10)
false
while selecting a PLC, it has nothing to do with the city's electrical code because all PLCs use ladder logic programming technique
false
The input module converts 5 volt dc into 120 volt ac
Electrical noise
The inputs and outputs of PLC protects CPU from one of the following.
input port 2 in the PLC module 1
The instruction with address I:1/2 represents the PLC input port ______ in the PLC module ______.
Baud rate
The unit of transmission for measuring the speed of communication is_______
Small Logix Controller
In a plc the SLC is an acronym for?
ASCII
barcode readers send _____ input signals
Sourcing
A sinking input device must be connected to a ______ input module port.
False
A washing machine is so simple electromechanical unit that it cannot be controlled by a PLC
capacitance
All of the following are physical selection criteria of a PLC except
Start Switch
All of the following items in the list are components of a plc except...
Digital to analog converter (DAC)
An ____ converts the digital output signals back to analog signals.
Optoislator
An____ ____ is used to input the DC signal to the CPU board
Zener diod
An_____ diod is a simi conductor device that can maintain a steady voltage level.
Flip Flop
An______ is a sequential Digital device that generates a different output for every input on the next clock pulse.
RISC based
An______ microprocessor typically uses only one instruction for a complex command.
CISC based
An______ microprocessor uses several math instructions to carry out complex commands.
Basic input output system
BIOS is an acronym for?
DAC (Digital to Analog Converter)
Digital, or variable, output modules use ______ ICs to convert digital data supplied by the PLC processor to scalable voltage or current output.
true
PLC's low voltage line should be a concern during its selection
Cache
The MPU uses _____ memory to speed up the data transfer while it is executing a program.
Rectifier
The component which converts ac to dc in the plc is called?
Modular Digital Controller
The first PLC introduced by Dick Morley was named
Firmware
The software that resides in ROM is called.
Remotely controlled
There are three types of PLC programming modules. One of the following is not among them:
100101100
multiply binary numbers 1100 and 11001
Octal
the _____ number system with a base of 8
msb most significant bit
the binary digit to the far left hand side of the number is called the
Ladder Logic Program
the user memory segment holds the ______ whereas the system memory segment stores memory information needed to execute the user program.
hexadecimal
the___ number system is used to display plc memory
