Thursday, November 1, 2012

Phần mềm thực hành và mô phỏng PLC Mítubishi

Sau đây là phần mềm và hướng dẫn sử dụng PLC các bạn có thể download về tham khảo:
Link down:
Link1:  GX simulator V7.7z

http://letitbit.net/download/40578.449a64b4d4c8f994bc76710e07bb/GX_simulator_V7.7z.html
http://lumfile.com/8cfkpu1dj04j/GX_simulator_V7.7z.html
http://rapidgator.net/file/53745714/GX_simulator_V7.7z.html
http://ryushare.com/bld2vsrpxomv/GX_simulator_V7.7z
Link2: ( FX training+Gx developer 8)

http://lumfile.com/qco8rszh2q7k/GX_Simmulator_7.24N.rar.html
http://letitbit.net/download/26586.2a456c7531a7238bb34f4e96396e/GX_Simmulator_7.24N.rar.html
http://rapidgator.net/file/53745726/GX_Simmulator_7.24N.rar.html
http://ryushare.com/8rtnr0xcix8h/GX_Simmulator_7.24N.rar
Link3:  (Huong dan dung PLC)

http://rapidgator.net/file/53745675/giao_trinh_huong_dan.rar.html
http://lumfile.com/kut5xzhu20o0/giao_trinh_huong_dan.rar.html
http://ryushare.com/r8cldqeut0pt/giao_trinh_huong_dan.rar
http://letitbit.net/download/69364.68570c80a684a0f23bd4488f74ff/giao_trinh_huong_dan.rar.html
Các bạn down tất cả các link về rồi cài đặt theo thứ tự nhé:
B1: Cài GX simulator V7.7z để chạy chương trình khi ko có PLC thật
các bạn vào thư mục EnvMEL trong GX simulator V7.7z để cài môi trường, sau đó thoát ra và cài GX simulator V7.7z.
B2: Cài phần mềm thực hành PLC GX Developer 8 và cài EnvMEL tương tự như ở bước 1.
Lưu ý: tất cả đều dùng key: 170-974813410
B3: Lập trình PLC. Sau khi các bạn gõ chương trình thì đáng lẽ khi thực hành trên phòng máy nhà trường khi có PLC thật ta vào mục Online-> Write to PLC nhưng nếu mình lập trình ở nhà ko có PLC thì ta vào mục Tools-> Start ladder logic test rồi chờ cho chương trình nạp vào PLC ảo xong sẽ hiện lên hộp thoai sau:
Untitled.png
Như vậy chương trình đã chạy.
Còn bây giờ là việc nhấn công tắc điều khiển:
Các bạn click chuột trái vào công tắc muốn nhấn(Ví dụ X000) rồi nhấn alt+1 sẽ hiện ra hộp thoại:
2.png
sau đó các bạn ấn Force ON/OFF để điều khiển công tắc đóng/mở như vậy chương trình sẽ chạy theo công tắc điều khiển chương trình.
(Lưu ý mẹo nhỏ khi gõ chương trình PLC: Gõ kết hợp cả hai kiểu Intructions và Ladder sẽ tiết kiệm thời gian của bạn hơn)
Chúc các bạn học tập tốt!


Standard Wiring Color Codes

Standard Wiring Color Codes
Wiring for AC and DC power distribution branch circuits are color coded for identification of individual wires. In some jurisdictions all wire colors are specified in legal documents. In other jurisdictions, only a few conductor colors are so codified. In that case, local custom dictates the “optional” wire colors.
IEC, AC: Most of Europe abides by IEC (International Electromechanical Commission) wiring color codes for AC branch circuits. These are listed in Table 2.1. The older color codes in the table reflect the previous style which did not account for proper phase rotation. The protective ground wire (listed as green-yellow) is green with yellow stripe.
Table 2.1: IEC (most of Europe) AC power circuit wiring color codes.
 UK, AC: The United Kingdom now follows the IEC AC wiring color codes. Table 2.2 liststhese along with the obsolete domestic color codes. For adding new colored wiring to existing old colored wiring see Cook.
Table 2.2: UK AC power circuit wiring color codes.
US, AC:The US National Electrical Code only mandates white (or grey) for the neutral
power conductor and bare copper, green, or green with yellow stripe for the protective ground. In principle any other colors except these may be used for the power conductors. The colors adopted as local practice are shown in Table 2.3. Black, red, and blue are used for 208 VAC three-phase; brown, orange and yellow are used for 480 VAC. Conductors larger than #6 AWG are only available in black and are color taped at the ends.
Canada: Canadian wiring is governed by the CEC (Canadian Electric Code). See Table 2.4. The protective ground is green or green with yellow stripe. The neutral is white, the hot (live or active) single phase wires are black , and red in the case of a second active. Three-phase lines are red, black, and blue.
Table 2.3: US AC power circuit wiring color codes
Table 2.4: Canada AC power circuit wiring color codes.
IEC, DC: DC power installations, for example, solar power and computer data centers, use color coding which follows the AC standards. The IEC color standard for DC power cables is listed in Table 2.5, adapted from Table 2, Cook.
Table 2.5: IEC DC power circuit wiring color codes.
US DC power: The US National Electrical Code (for both AC and DC) mandates that
the grounded neutral conductor of a power system be white or grey. The protective ground must be bare, green or green-yellow striped. Hot (active) wires may be any other colors except these. However, common practice (per local electrical inspectors) is for the first hot (live or active) wire to be black and the second hot to be red. The recommendations in Table 2.6 areby Wiles. [2] He makes no recommendation for ungrounded power system colors. Usage of the ungrounded system is discouraged for safety. However, red (+) and black (-) follows the coloring of the grounded systems in the table.
Table 2.6: US recommended DC power circuit wiring color codes.
[1]Paul Cook, “Harmonised colours and alphanumeric marking”, IEEWiring Matters, Spring 2004
[2] John Wiles, “Photovoltaic Power Systems and the National Electrical Code: Suggested Practices”, Southwest Technology Development Institute, New Mexico State University, March 2001



Addressing of Mitsubishi PLC FX2N

Addressing of Mitsubishi PLC FX2N 


Addressing of Mitsubishi  PLC FX2N

Digital Input
X0-X7…. Octal System i.e. (X0 To X7,X10 to X17 )
Digital Output
Y0-Y7… Octal System i.e. (Y0 To Y7,Y10 to Y17 )
Analog Input
Need To Read Control Register using “From” Instruction
Analog Output
Need To Write Control Register using “To” Instruction




Timers
T0 to T255
For Timers : Time Delay = Time Base * Preset
Time Done Bit : Tx
Where X is address of Timer used.

Counters
 C0 to C234
For Counter:  Preset is number of Counts.
Counter Done Bit : Cx         Present value of Counter :Cx
Where X is address of counter used.

Integer
D0 to D7999(D200 to D7999 Retentive)
Auxiliary Relay
M0 to M3071 (M500 to M3071 Retentive)

Programming Software : GxDeveloper
Driver For Programming:  Melsec

Programmable Logic Controller Introduction

Programmable Logic Controller Introduction

 PLC (Programmable Logic Controller) is one of electronic equipments. It was called “Sequence Controller” before. It was named “Programmable Logic Controller (PLC)” by NEMA (National Electrical Manufacture Association) in 1978 and defined as electronic equipment. The operation of PLC is explained in the following steps:

Step 1
Read the external input signal, such as the status of keypad, sensor, switch and pulse.
Step 2
Using microprocessor to execute the calculations of logic, sequence, timer,counter and formula according to the status and the value of the input signal read in the step 1 and pre-write programs saved inner to get the corresponding output signal, such as open or close of relay, operation of controlled machine or procedure to control automatic machine or procedure of manufacture. PLC also can be used to maintain and adjust of production program by editing or modifying the peripheral equipments (personal computer/handheld programming panel). The common program language of PLC is ladder diagram. There are stronger functions in PLC with the development and application requirements of electronic technology, such as position control, network and etc. Output/Input signals are DI (Digital Input), AI (Analog Input), PI (Pulse Input), DO (Digital Output), AO (Analog Output) and PO (Pulse Output). Thus PLC plays an important role in the feature industry.
In today's environment of automation, the importance of PLC has rapidly increased. With growing demand for training in this area, Different company's has introduced several packages for PLC training. The standard package consists of PLC module, power supply, programming and operating software and PC/PPI cable. An optional accessory includes digital and analog expansion modules.

PLC Performs following functions.

  • PLC performs relay equivalent functions
  • PLC performs ON/OFF control
  • Ladder diagram programming
  • Designed for industrial environment
PLC INPUT Wiring:

  • Push buttons
  • Selector Switches
  • Limit Switches
  • Level Switches    
  • Photoelectric Sensors
  • Proximity Sensors 
  • Motor Starter Contacts 
  • Relay Contacts 
  • Thumb wheel Switches 
PLC OUTPUT wiring 
  • Valves 
  • Motor 
  • Starters 
  • Solenoids 
  • Control 
  • Relays
  • Alarms 
  • Lights 
  • Fans 
Internal Structure of PLC  
 
Selecting PLC hardware

       Inputs/Outputs
      Type,
       AC, DC, sourcing, sinking, etc.
      Number of
       10, 16, 20, 32, 156
       Memory
      Type
       Flash or Battery backed
      Size
       1k, 6k, 12k, 16k, 64k
       Functions required
      Instruction set
       Messaging
       PID
       PTO, PWM
      Arithmetic
      Communications
       DeviceNet, Ethernet
       Remote I/O, DH+
      Report generation


PLC application  

       Solenoid 1
      On  = Sol 3 is off, and Motor is off, and Sensor 2 is off, and Auto Switch is on
      Off  = Sol 3 is on, or Motor is on, or Sensor 2 is on
       Solenoid 2
      On  = Sol 3 is off, and Motor is off, and Sensor 2 is on
      Off  = Sol 3 is on, or Motor is on, or Sensor 1 is on
       Motor
      On  = Sensor 1 is on, and Solenoid 2 is off, and Solenoid 1 is off
      Off  = Solenoid 3 on
       Solenoid 3
      On  = Sol 1 is off, and Sol 2 is off, and Motor has run for 30 sec.
      Off  = Solenoid 3 has been on for 60 sec.

Typical circuit diagram of Star Delta starter

Typical circuit diagram of Star Delta starter

 

S0 = ‘OFF’ Push button
S1 = ‘ON’ Push button
K1 = Line contactor
K2 = Star contactor
K3 = Delta contactor
K4 = Star delta timer (7PU60 20)
F2 = Overload relay
F1 = Backup fuse
F3 = Control circuit fuse


This is a starting method that reduces the starting current and starting torque. The device normally consists of three contactors, an overload relay and a timer for setting the time in the star-position (starting position). The motor must be delta connected during a normal run, in order to be able to use this starting method. The received starting current is about 30 % of the starting current during direct on line start and the starting torque is reduced to about 25 % of the torque available at a D.O.L start. This starting method only works when the application is light loaded during the start. If the motor is too heavily loaded, there will not be enough torque to accelerate the motor up to speed before switching over to the delta position. When starting up pumps and fans for example, the load torque is low at the beginning of the start and increases with the square of the speed. When reaching approx. 80-85 % of the motor rated speed the load torque is equal to the motor torque and the acceleration ceases. To reach the rated speed, a switch over to delta position is necessary, and this will very often result in high transmission and current peaks. In some cases the current peak can reach a value that is even bigger than for a D.O.L start. Applications with a load torque higher than 50 % of the motor rated torque will not be able to start using the start-delta starter. 

Wiring of Star Delta Starter with Timer Control Panel




PLC Program for Star Delta Starter 




 

Basics Of Electrical Engineering


Basics Of Electrical Engineering


Fundamentals of Electrical Control



Fundamentals of Electrical Control

Author(s): Clarence A. Phipps
Publisher:
Date: 1998-12 Format: pdf Language: English ISBN10: 0881733121
Pages: OCR: Quality: ISBN13: 9780881733129
Use this practical "on-the-job" manual to guide you through the most difficult electrical control challenges.

From the logic of design to startup, operation and maintenance, this reference covers all aspects of wiring, relay logic, programmable logic controllers, and a host of electrical control applications and challenges you'll encounter on the job. Beginning with the basic principles of electrical logic, the author guides you through each step of the design of a sequencing logic system, including developing the schematic diagram, making a bill of materials, and designing component wiring diagrams. You'll learn the fundamentals of programmable logic controllers (PLCs), including numbering systems, basic memory structure, system addressing, and the common instruction set. A new chapter on heat and enclosures includes information on the creation of heat in electronic devices, and how it can be dissipated. The presentation takes you step by step through solving problems that require bailing circuits, sorting systems, and counting with relays, including encoding and decoding. The contrast between digital and analog control systems is also fully examined. Case histories are included. This text refers to an out of print or unavailable edition of this title.
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