Flashcards
Plc and motor controls
Cards in this deck (54)
- 1What kind of I/0 fixed can be expanded?moduler
- 2relaysBoth Ac& Dc
- 3What network is used in classDH485
- 4gfgfgfbgbgfvenenjkrek
- 5What is descretEither on or off. true or false (pb,relay or switch)
- 6Analogoperate between on and off
- 7TWO types of discrete input devicesPush buttons
limit switch
relay contacts
selector switch - 8Analog input devicesRTD,
transducer
thermocouple - 9Optical isolationKeeps cpu & real world circuits isolated
- 10What device is used when the rack of I/O is located remotely from processorRemote I/O
- 115 parts of plcCPU
INPUTS
OUTPUTS
PROGRAM DEVICE
POWER SUPPLY - 12operating voltage is different from the control voltageuse interposing relay
- 13two types of memoryvioatileRAM
non viotile ROM - 141VERY Smallest memoryBIT
- 152Next smallest memoryBite
- 163 smallestWord( unit of memory) ( 8 to 64 bits)
- 17File( group of words)biggest unit of memory
- 18How many bits in a bite8 bits
- 19how many bits in a word1 to 64
- 204 advantages of plc over relay logicmore reliable
Cheaper
flexibility
speed - 21Scan timeProcess where computer scans outputs for voltages at terminals, put in memory as 0 or 1
- 22triacac inputs or outputs
- 23How to make PLC fasterput false readings first over true readings
- 24How to size PLC for application 3size of control program
inputs and output cards
room for future expansion. - 25DecimalBase 10 system, numbers 0-9
- 26BinaryBase 2 system, numbers 0 and 1
- 27OctalBase 8 system, numbers 0-7
- 28Hexadecimal:Base 16 system, numbers 0-9, and letters A-F
- 2911100101 Binary to decimal1,0,4,00
- 30Reduce voltage startingused to limit current
- 315 different start windingsaunt transformer
primary reisisitor
part winding
solid-state
wye delta - 32How to find LrCHPXCODEX1000/ SQRT 3 *V
- 33CEMFSTRENGTH MAG IN POLE PIECES
number of turn in armature
speed of the armature - 34what is the full load currencurrent required by a motor to produce full load torque at rated speed
- 35two types of transitionsopen
closed - 36open transitionmotor temporary disconnected from source voltage, when changing between starting and running sources
- 37closed trnasitionremains connected to source voltage when changing between running and starting
- 38what limits the current in the motor when initially startedresistance of armature/field windings
- 39at what point should the motor transition between starting voltage to running voltagemaximum speed
- 40voltage sagdip in voltage greater than 10%
- 413 reasons for reduced voltagelimits current
prevents electrical interference
protects motor - 42advantage of primary resistor startinglimits current
use any motor
Smooth acceleration - 43wye dealt needs how may leads6 or 12
- 44why or delta firstwye- lower voltage in the winding starting
- 45adv of wyehigher torque per line ampere
- 46part winding has how many leads9 leads
- 47solid state windingscr conncetd in parallel, controls voltage, c
- 48rheostat startingrheostat in series with armature winding of a dc motor
- 49auto transformer advturns ratio
high starting torque per line ampere
voltage applied to motor remains constant - 50open transitionwye delta
- 51disadvantages open transitionvoltage spikes
disconnected between staring to running - 52advprimary risestorany motor
controls starting torque
smooth acceleration - 53which method requires 9 lead motorpart winding
- 54which staring method has the most expensive costautotransofremr
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- Electrical Flashcards on Plc and motor controls, created by Orlando Banks on 25/01/2017.
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- Orlando Banks
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