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WorksheetsPLC Analog Signals 1 and 2 unit
Total questions: 45
Worksheet time: 23mins
PLC works with which values?
Octal
Boolean
Hexadecimal
1 nibble =
4 byte
4 bits
4 KB
1 word =
16 bytes
16 KB
8 bits
Full form of ADC is
Analog to Data Converter
Analog to Digital Converter
Amplitude to Digital Converter
1 byte =
16 bytes
16 KB
8 bits
A binary number with one digit is called a ____
Bit
byte
Word
Analog signal can be converted to Digital values using
Resolution
Sampling
Memory Allocation
The A/D converter samples the amplitude of the analog signal at
Discrete intervals
Discrete function
maximum range
three types of analog signals in PLC programming___ ____ ____
Voltage, Current & Resistance
Voltage, Current & Transistor
Resistor, Current & Transistor
the process of mapping continuous infinite values to a smaller set of discrete finite values is ______
Resolution
Quantization
Sampling
The number of bits used to represent the analog input defines
Resolution
Range
Sampling
PLC Value 27648 represents 10V analog signal. calculate the real resolution of our analog signal.
361.7 μV
367.7 μV
369.7 μV
In Siemens PLC, what is Overshoot Range?
22.86 mA
22.96 mA
22.81 mA
In Siemens PLC, what is Undershoot Range?
1.815 mA
1.885 mA
1.15 mA
In Siemens PLC, what is Overflow Range?
22.86 mA
22.96 mA
22.81 mA
Wiring of Analog signals is categorised into?
Voltage and Resistance
Voltage and Current
Resistance and Current
Which of the following is example for input analog sensors and transmitters.
Submersible Level Transmitters
Pressure Transmitter
Temperature Sensor
Temperature transmitter with a 4-20 mA output. Connected to the transmitter is a temperature sensor. The transmitter is then calibrated to a range
4 mA
12mA
16mA
What is common between both voltage and current analog signal wiring?
Temperature
Resistance
Reactance
Analog voltage inputs has two terminals, what are those?
AGND and AI
PAIN and AG
AGAIN and AGND
All electrical wires (conductors) have resistance and hence creating a ____ drop.when you have as long as distances of wiring.
Current
Resistance
Voltage
PLC analog module terminal AIN is connected to______terminal of voltage source.
Positive(+)
Negative(-)
Ground
PLC analog module terminal AGND is connected to______terminal of voltage source.
Positive(+)
Negative(-)
Ground
Which terminal is used as reference for our analog signal?
AIN
AGND
AI
How can we reduce the effect of Electromagnetic Interference?
Sampling
Shielding
EMC
The current in analog signals is usually measured in _____unit
Resistance
Voltage
Amperes (A)
A resistor is put between positive (AI) and negative (AGND). This will converts our current signal to a voltage signal. This resistor called as___
Capacitor
Closed loop
Voltage drop
What is the resistance of shunt resistor in Siemens analog input module.
300 Ohm
250 Ohm
350 Ohm
Which analog input Wiring method separates the supply from the signal
2-wire Analog Input
3-wire Analog Input
4-wire Analog Input
convert the raw value from the analog input to some sort of engineering value Is
unscaling
scaling
both a and b
Example for engineering value is
ampere
volt
resistence
The block used for scaling in PLC is
FC 107
FC 106
FC 105
FC 105 has -------- inputs
3
2
5
The range of Raw value in siemens plc is
0-376
500-27648
0-27248
Example for Analog outputs for PLC are
motor
sensor
valve
PLC Analog outputs need ------------ Signal
discrete signal
pulse signal
continuous
Wiring of Voltage and Current IS same in PLC
TRUE
FALSE
both a and b
Wiring of Voltage and Current is depends on
input
sensor
plc
Voltage Output consist of how many terminal
2
3
4
opposition that a circuit presents to changes in current or voltage
flux
density
line impedence
Two extra terminals are used in voltage analog output wiring
for load
for compensating
for signal
Minimum load impedance in Voltage wiring is
500 Ohm
1k ohm
300 ohm
if we want to generate 8ma signal from plc what value should be given D to A converter
76
128
1069
The need of scaling function in PLC
for processing
to show the measurement on an HMI.
It is convenient to work with the engineering value
The need of unscaling function in PLC module can convert to an output
for processing
to show the measurement on an HMI.
