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Programmable Logic Controller

QEC25689

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In modern century in this time more and more company which technological to use, so that everything

become accurate and quicker. Along go forward technological and to the number of appliance of electrics

make we will progressively more amount learning to pursue technology. One of very technology needed by

a company for example is Programmable Logic Controller or PLC. This PLC represent a electrics peripheral

which is good for as control in system network or wear command in course of production. One of brand

from PLC is OMRON, SIEMENS, MATSUSHITA, TOSHIBA, MITSUBISHI, and other.

PLC is represent an equipments control electronic created from result of solidarity of among computer

technology " solid-state " and " traditional sequence controller " . If visible from computer used, PLC is

special purpose group. Computer special purpose is designed special tools to process certain problem, for

example inspection equipment.

Basically PLC have function to replace job from relays mechanic and timer or switch manual. Because

by excellence from micro controller equipments develop hardware, hence PLC can operate arithmetical,

converting data from analogue to digital or on the contrary, and can finish control problem having the

character of complex. To correspond to job circumstance, hence PLC designed to can operate on dusty

industry environment and mount high pollution, with temperature change 0 - 60oC and the dampness

relative at 0% - 95%.

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National Electrical Manufactures Association ( NEMA ) giving the meaning of PLC :

" The electrics equipments operating digital by using " programmable memory" to is depository of

instructions internal in the place of job from equipments having functions specific, like " logic, squence,

timer, counter and mathematic", and to control job from machines or process, through input output

module analogously to digital"

Usually public Name and type of Programmable Logic

OMRON industry, SIEMENS industry, TOSHIBA industry, MITSUBISHI industry, LG industry

For examples name of product :

CJ1

CVM

ZEN

CPM

S7-200

T1-40

FX-3U

AL6



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CJ1

CVM

ZEN

CPM

S7-200

T1-40

FX-3U

AL6

SPESIFICATION

-. I / O multi fuction

-. Communication Host link (serial Port or LPT )

-. Memory Card -. Analog system

-. Memory Program

-. OMRON production

Click my to Example application



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CJ1

CVM

ZEN

CPM

S7-200

T1-40

FX-3U

AL6

SPESIFICATION

-. I / O standart

-. Communication Host link / N : 1

-. Serial Port / LPT / USB / LAN -. Programming Console

-. Analog system

-. Memory Program

-. OMRON production




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CJ1

CVM

ZEN

CPM

S7-200

T1-40

FX-3U

AL6

SPESIFICATION

-. I / O standart

-. Communication Host link

-. Serial Port / Programmning Console -. Memory Program

-. OMRON production




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CJ1

CVM

ZEN

CPM

S7-200

T1-40

FX-3U

AL6

SPESIFICATION

-. I / O standart

-. Communication internal

-. Memory Program -. OMRON production



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CJ1

CVM

ZEN

CPM

S7-200

T1-40

FX-3U

AL6

SPESIFICATION

-. I / O standart


-. Serial Port -. Memory Program

-. SIEMENS production



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CJ1

CVM

ZEN

CPM

S7-200

T1-40

FX-3U

AL6

SPESIFICATION

-. I / O standart


-. Serial Port -. Memory Program

-. TOSHIBA production



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CJ1

CVM

ZEN

CPM

S7-200

T1-40

FX-3U

AL6

SPESIFICATION

-. I / O standart


-. LPT / LAN / USB -. Memory Program

-. MITSUBISHI production



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CJ1

CVM

ZEN

CPM

S7-200

T1-40

FX-3U

AL6

SPESIFICATION

-. I / O multi fuction


-. LAN -. Analog system

-. Memory Program

-. LG production



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CONTROL SYSTEM

Word control often we hear in everyday discussion. Word control here can be interpreted " arranging",

and if us narrow again meaning usage of word control in electrics technique is an equipments group or

equipments used to arrange function machine to specify the machine behavior is matching with the one

which wanted. System having ability to start, arranging and riffing process to get output matching with

the one which wanted to be referred as " Control Systems ". And in general a control systems to

represent an corps equipments of electric / electronic, equipments of mechanic, or equipments of other

electrics which used to guarantee stability, smooth transition and accuration a process also . Every

control systems have three fundamental element, that is : input, process, and output. In general input

come from transducer. This Transducer is an appliance able to change physical amount become electrics

sign. Some example of shares among others can in the form of : push bottom, mini circuit breaker,

censor, contactor, etc.




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This transducer deliver information concerning measured amount. Process in this control systems can in

the form of network control by using equipments of stringed up control electrics. And there is also using

equipments of control with program system which can innovated or more popular referred by the name

of PLC (Programmable Logic Controller). At control with program system of which can innovated, control

program kept in a memory unit and enable or can change program which have been written previously,

that is by program repeat is matching with the one which wanted. Duty from part of process is to

process data coming from input and then as its result in the form of effect (output). Sign coming from

part of this process in the form of electrics sign which is then wear to activate equipments of output

like : motor, solenoid, lamp, spillway, etc. By using equipments of this output can earn to change

electrics amount into physical amount.


Open Loop Closed Loop

Click options to configuration, if you are not understanding



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Control of Open Loop to represent a process in system of which input variable will have an in with

yielded output. Picture following diagram block system of loop open, which possible can assist you in

comprehending the control systems. If us see from diagram block, at control systems of loop open here

no given information to equipments of control coming from equipments of output ( controlled variable),

ignorable so that correctly what is wanted output as according to desire or not. Especially in the event

of trouble from outside able to influence output. Therefore at this system will happened big enough

mistake because of corrective inexistence.





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Control of Closed Loop is a process of which controlled variable is continually censored then compared

to reference amount. As for controlled variable can in the form of result of measurement like for

example measurement of temperature, dampness, mechanic position, speed of rotation, etc. Then

result of baited by mentioned measurement of inversion to comparator. This comparator can in the form

of equipments of mechanic, electrics / electronic, or pneumatic. At this comparator appliance between

reference amount with censor sign coming from controlled to be variable to be compared to, and as its

result mistake sign. This error sign its result can be negative or positive, mathematically this mistake

sign like use under equation.





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PLC ( PROGRAMMABLE LOGIC CONTROLLER ) is an equipments of created

control from result of solidarity between technology of computer " solid ‐ state" and is " traditional of controller

sequence " manual control. Peculiarly PLC is purpose special that is special designed computer to operate a

certain problem related to controller or problem work process or machine in the industry. According To NEMA

( National Electrical Manufactures Association ) giving congeniality of PLC that is " an equipments of electrics

operating digital by using memory programmable to be is depository of internal instructions in the place of

activity of equipments having specific function, examples : logic, sequence, timer, counter, and mathematic, to

control of process or machines, passing input module of output analogously is ‐ digital ".

As for advantage by using PLC is :

1. Cheaper of expense compared to control system using many relay ( manual control ).

2. Easier in programing and earn to easily altered its system network.

3. More peaceful is , practical , and rely on from network of control manual.

4. Having principle like computer.

5. Easier in tracing network trouble of control made.



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Prinsip of PLC :

Principle work from PLC in general is to accept sign analogous of equipments of external Input which in

the form of : push bottom, overload, censor, etc. sign this Analogous by input module will be altered to

become sign ‐ digital. At system to be controlled to have sign or throb in every and input of output,

good in the form of sign analogous and also digital sign. This digital sign will be processed by unit of

product especial is " Central Processing Unit ( CPU ), as according to command of program which have

been specified or program at memory. Here after CPU will take decision ‐ decision which later will be

carried over by module of Output still in the form of sign digital. Module of Output will change digital

sign become analogous sign. This sign analogous move relay ‐ or relay of contactor, representing

equipments of external output.



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Hardware PLC

Hardware basically by a PLC is same with hardware owned by Personal Computer ( PC ). However

owning difference in division of unit. In hardware PLC have three component

1. Part Of Input—Output ( I /O ).

2. Processor.

3. Programming of Devices.

Type of PLC

MODULAR COMPACT

Click bottom for look picture……..



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Hardware PLC


owning difference in division of unit. In hardware PLC have three component

1. Part Of Input—Output ( I /O ). >>>> picture

2. Processor. >>>> picture

3. Programming of Devices. >>>> picture

Type of PLC

MODULAR COMPACT



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Hardware PLC


owning difference in division of unit. In hardware this PLC have three component

1. Part Of Input—Output ( I /O ). >>>> picture

2. Processor. >>>> picture

3. Programming of Devices. >>>> picture

Type of PLC

MODULAR COMPACT



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Part of PLC have shares function which each other is interconnected. As for every shares have the

function :

1. Interface Function (click here)

2. Central Processor Unit (click here)

3. Programming Devices (click here)

4. Power supply (click here)



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CENTRAL PROCESSOR UNIT

“ Processor “ representing punch line of PLC which processing and saving all sent program ( download ) into PLC. Processed is Program to be adapted for situation of input and another. Kinds of function of processor for example : ]] Especial Process Unit ]] User Program of Memory ]] Variable Data of Memory ]] Image Tables



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PROGRAMMING DEVICE

" Programming of Devices " representing is hardware the than functioning PLC to include, to editing,

modifying and monitoring existing program in PLC memory, so that PLC can be operated as according to

program control which have memory. This tables represent kinds of programing devices used by OMRON.

Kinds of Programming Devices is



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POWER SUPPLY UNIT Power is often referred also power supply, functioning as supply of peripheral of PLC. All peripheral of PLC always require the source of tension used to move or operate used PLC processor. As for big the so small used tension depended from PLC type wear. Because most of all PLC type require voltage supply, as according to type and requirement of PLC which utility. Generally supply used for the processor of this big PLC of tension for example : • Power supply for INPUT is DC with 12V or 24V. • Power supply for OUTPUT is DC or AC with 12V, 24V, 120V, 230V. Big and the so small used power Input goodness and or Output depended from type and type of PLC. Because every PLC always vary depended from requirement of user.



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INTERFACE FUNCTION

A. Input ( click here )

Input module ( I ) functioning to convert analogous sign into digital sign which accepted by equipments of external input. This digital Input sign will be processed by processor.

B. Output ( click here )

Output module ( O ) functioning to convert digital sign to analogous sign which than product of process or machine with pass contactors / relay.

Pictures wiring……….



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INTERFACE FUNCTION

A. Input


B. Output ( click here )




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INTERFACE FUNCTION

A. Input ( click here )


B. Output




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PROGRAMMING LANGUAGE

Before compiling program for the operation of PLC AT processing control or system, have to know and

memorize programming language of PLC to use of. PLC cannot be used if do not be entered an

instruction program. Command of program or command which have been made by a programmer if

included into PLC have to use programming language of PLC.

With this basic Ianguage a programmer can communicate direct with PLC, and also can arrange the

way of activity PLC to matching with the one which wanted. As for programming language of PLC

referred " Relay Ladder Logic " which must know and memorized to start from :

1. MNEMONIC CODE (click here)

2. LADDER DIAGRAM (for intermediate)

3. FUNCTION PLAN of BLOCK (for expert)



Ladder Diagram

The basics of ladder-diagram programming and conversion to mnemonic code There are basically two types of instructions used in ladder-diagram programming instructions that correspond to the conditions on the ladder diagram and are used in instruction form only when converting a program to mnemonic code and instructions that are used on the right side of the ladder diagram and are executed according to the conditions on the instruction lines leading to them. A ladder diagram consists of one line running down the left side with lines branching off to the right. The line on the left is called the bus bar; the branching lines, instruction lines or rungs. Along the instruction lines are placed conditions that lead to other instructions on the right side. The logical combinations of these conditions determine when and how the instructions at the right are executed. A ladder diagram is shown below.

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Ladder Diagram

Ladder diagram instructions include ladder instructions and logic block instructions and correspond to the conditions on the ladder diagram. Logic block instructions are used to relate more complex parts. 1.Elementary command >> LOAD or LD >> NOT >> AND >> OR >> OUT >> END

2.Continues command >> TIM >> CNT >> KEEP >> IL and ILC >> DIFD , DIFU >> SFT NEXT



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Ladder LD

Operand data area


Ladder Diagram





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Ladder LD NOT

Operand data area


Ladder Diagram





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Ladder AND

Operand data area


Ladder Diagram





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Ladder OR

Operand data area


Ladder Diagram





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Ladder OUT

Operand data area


Ladder Diagram





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Ladder END


Ladder Diagram





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Ladder TIM

Operand data area

Definer value


Ladder Diagram





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Ladder CNT

Operand data area

Definer value


Ladder Diagram





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Ladder KEEP

Operand data area


Ladder Diagram





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Ladder IL

Ladder ILC


Ladder Diagram





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Ladder DIFD

Ladder DIFU

Operand data area


Ladder Diagram





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Ladder SFT

Operand data area


Ladder Diagram





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Law of Ladder Diagram

Ladder diagram instructions include ladder instructions and logic block instructions and correspond to the conditions on the ladder diagram. Logic block instructions are used to relate more complex parts. 1.The number of times any particular bit can be assigned to conditions is not limited, so use them as many times as

required to simplify your program. Often, complicated programs are the result of attempts to reduce the number of times a bit is used.

Example

2.The number of conditions that can be used in series or parallel is unlimited as long as the memory capacity of the PC is not exceeded. Therefore, use as many conditions as required to draw a clear diagram. Although very complicated diagrams can be drawn with instruction lines, there must not be any conditions on lines running vertically between two other instruction lines.

Example

3. The number of conditions that can be used in lines is unlimited as long as the memory capacity of the PC is not exceeded after the condition is finish. If there is conditions after lines out can’t be complicated program are the result of attempts to reduce the number of times a bit is used.

Example

4. etc



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Example


Example

3. The number of conditions that can be used in lines is unlimited as long as the memory capacity of the PC is not

exceeded after the condition is finish. If there is conditions after lines out can’t be complicated program are the result of attempts to reduce the number of times a bit is used.

Example

4. etc



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Example


Example

3.The number of conditions that can be used in lines is unlimited as long as the memory capacity of the PC is not exceeded after the condition is finish. If there is conditions after lines out can’t be complicated program are the result of attempts to reduce the number of times a bit is used.

Example

4. etc



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Example


Example

3.The number of conditions that can be used in lines is unlimited as long as the memory capacity of the PC is not exceeded after the condition is finish. If there is conditions after lines out can’t be complicated program are the result of attempts to reduce the number of times a bit is used.

Example

4. etc

Instruction



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Some examples :

#. Basic instruction

#. Seri and Parallel Instruction

#. Function Instruction

#. Application 1

#. Application 2

#. Application 3

Examples…………...



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Some examples :




#. Application 1

#. Application 2

#. Application 3

Examples…………...

4/27/2009 www.totok-nur-alif.blogspot.com

S0

S1

K1

K1

K1

13

14

1

3

LAMPU

A1

A2

L

N

11

12

Mnemonic Code



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Some examples :




#. Application 1

#. Application 2

#. Application 3

5/3/2009 www.totok-nur-alif.blogspot.com

S0

S1

K1

K1

K1

13

14

1

3

LAMPU

A1

A2

L

N

11

12 K2

13

14

Mnemonic Code



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Wiring and Connection This section provides basic information on wiring the Power Supply Unit and Expansion I/O Unit, and on connecting

Peripheral Devices. >>. General Precautions for Wiring. >>. Ground Wiring. >>. Power Supply Wiring. >>. Input ( I ) Wiring. >>. Output ( O ) Wiring.



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1. Power Supply Input Terminals Connect the power supply (100 to 240 VAC or 24 VDC) to these terminals.

2. Functional Ground Terminal ( ) Be sure to ground this terminal (AC-type PCs only) to enhance immunity to noise and reduce the risk of electric

shock. 3. Protective Ground Terminal ( ) Be sure to ground this terminal to reduce the risk of electric shock. 4. External Power Supply Terminals CPM2A PCs are equipped with these 24-VDC power output terminals to supply power to input devices. (AC-type

PCs only.) 5. Input Terminals Connects the CPU Unit to external input devices. 6. Output Terminals Connects the CPU Unit to external output devices.

7. PC Status Indicators These indicators show the operating status of the PC, as shown in the following table.

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8. Input Indicators The input indicators are lit when the corresponding input terminal is ON. The indicators are lit during I/O

refreshing. When a fatal error occurs, the input indicators change as follows:

Note

a) When interrupt inputs are used in interrupt input mode, the indicator may not light

even when the interrupt condition is met if the input is not ON long enough.

b) When high-speed counters are used, the input indicator may not light if the input pulse is too fast.

9. Output Indicators The output indicators are lit when the corresponding output terminal is ON.The indicators are lit during I/O

refreshing. When pulse outputs are being used, the indicator will remain lit continuously while the pulses are

being output.

10.Analog Controls Turn these controls to change the analog settings (0 to 200) in IR 250 and IR 251.

11.Peripheral Port Connects the PC to a Programming Device (including Programming Consoles), host computer, or standard

external device.

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13.Communications Switch This switch selects whether the Peripheral port and RS-232C port will use the communications settings in the PC

Setup or the standard settings.

Note

This switch’s setting has no effect on communications with a Programming Console connected to the

Peripheral port. It affects the RS-232C port.

14.Battery

This battery backs up memory in the CPU Unit and is connected when the Unit is shipped. 15.Expansion Connector Connects the PC’s CPU Unit to an Expansion I/O Unit or Expansion Unit(Analog I/O Unit, Temperature Sensor

Unit, or CompoBus/S I/O Link Unit). Up to 3 Expansion Units or Expansion I/O Units can be connected to a CPU

Unit.



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Grounding Be sure to ground the earth terminal to less than 100 Ω in order to protect against electric shock and incorrect operation from electrical noise. Be sure to use a wire of at least 1.25 mm2 for grounding.

Removing the Terminal Block The terminal block on the PLC CPU Unit can be removed. Use the following procedure.

The terminal blocks on the Expansion Units and Expansion I/O Units cannot be removed.

1. Loosen the black screws at the ends of the terminal block as shown in the following diagram.

2. Lift the terminal block off the CPU Unit.



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Power Supply Wire a separate circuit for the PLC’s power supply circuit so that there isn’t a voltage drop from the inrush current that flows when other equipment is turned on. When several PLC are being used, it is recommended to wire the PCs on separate circuits to prevent a voltage drop from the inrush current or incorrect operation of the circuit breaker. Use twisted power supply wires to prevent noise from the power supply lines. Adding a 1:1 isolating transformer reduces electrical noise even further. Considering the possibility of voltage drops and the allowable current, be sure to use thick power lines.



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Input ( I ) Wire the inputs to the PLC Unit and Expansion I/O Units as shown in the following diagrams. Use crimp terminals or solid wires (not stranded wire) to connect to the PC. The power supply output terminals can be used with CPU Units with AC power supplies.

Input Configuration The following diagrams show the input configurations.



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Output ( O ) Wire the outputs to the PLC Unit and Expansion I/O Units as shown in the following diagrams. Use crimp terminals or solid wires (not stranded wire) to connect to the PC. The power supply output terminals can be used with CPU Units with AC power supplies.

Output Configuration The following diagrams show the output configurations.


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