Basic PLC Part I -Introduction to PLC
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Transcript of Basic PLC Part I -Introduction to PLC
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Welcome to
PLC And CX-Programmer Training
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Course Contents
•Introduction of PLC
•System Configuration
•Features & Function
•Unit Specification
•Basic Command with Basic Programming method.
•Exercise With Application
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Introduction: Control System-Control Panel
Start & StopOperation
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What is inside the control panel?
Contactors, relays, timers & countersin the control panel
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Control System: Control System: InputInput
Flow Rate
Float Level
Oxygen Level
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Control System:Control System:OutputOutput
Motor pump
Valve
Mixer
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Conventional Hardwire Logic
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Hardwire logic control circuit
Relay 1StartStart StopStop
Relay 1
PumpTimer
TimerRelay 1 Solenoid
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Conventional Relay Control Panel
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A solid-state device used to control machine or process operation by means of a stored program and feedback from input and output devices.
Introduction to Omron CQM1 PLCIntroduction to Omron CQM1 PLC
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What PLC can do?What PLC can do?Sequence ControlSequence Control
Relay 1StartStart StopStop
Relay 1
PumpTimer
TimerRelay 1 Solenoid
Relays
Timers & Counters
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Sophisticated ControlSophisticated Control
+-x/
21
3 45
Prod Pass RejectAA 33 4BB 27 3CC 43 8
Arithmetic Operation
Analog ControlInformation Handling
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Supervisory Control
PLC
Computer
PrinterFA
Network
Process Monitoring
Pager
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PLCPLC HardwireHardwireLogicLogic
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Control DeviceControl Device
Specific Purpose
General Purpose
Wired LogicWired Logic PLCPLC
Control sequence isControl sequence isfixed for one designfixed for one design
Control sequence can beControl sequence can bechanged from time to timechanged from time to time
without rewirewithout rewire
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PLCPLC
Control ScaleControl ScaleSmall & Medium Medium & Large
Wired LogicWired Logic
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Relay 1
StartStart StopStop
Relay 1
PumpTimer
TimerRelay 1 Solenoid
LD STARTOR RELAY 1AND NOT STOPOUT RELAY1OUT SOLENOIDLD RELAY 1TIM 000
#0020LD TIM 000OUT PUMP
Modification Modification The same example for PLC control system
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The same example for PLC control system
Only need to change the ladder program
Relay 1
StartStart StopStop
Relay 1
PumpCounter
SolenoidRelay 1
Counter#30
StopStop
LD STARTOR RELAY 1AND NOT STOPOUT RELAY1OUT SOLENOIDLD RELAY 1LD STOPCNT 000
#0030LD CNT 000OUT PUMP
Modification Modification
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Wired LogicWired Logic PLCPLC
Delivery PeriodSeveral days Almost Immediate
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MaintenanceMaintenanceDifficult Easy
LED indicator
Wired LogicWired Logic PLCPLC
Input/output connectorcan be remove easily
without using screw driver
ProgrammingConsole
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Economic EfficiencyAdvantage on
small scaleAdvantage onsmall, medium
and large
$$$$$$Wired LogicWired Logic PLCPLC
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Power ConsumptionPower Consumption
High Low
0.2 Amp> 2 Amp
Wired LogicWired Logic PLCPLC
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•Fast project implementation time•Low operating cost•Increase productivity•Reliability•Easy maintenance
ConclusionConclusion
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Applications Of PLC
Material Handling Packaging Machine Pump Control Water Treatment Paper & Pulp
Industries Cement
Manufacturing Electroplating
Plants
Power Plant Disk Drive
Manufacturing Traffic Light System Car Manufacturing Building Automation IC Manufacturing Amusement Park
Control