Difference between HMI and PLC


What is a PLC?
The PLC stand for Programmable Logic Controller. They are most usually applied in industrial applications, it generally lacks a keyboard, mouse, and a monitor, as it is normally programmed to run a system or machine.
The system or machine user seldom interacts directly with the program of PLC. When it is required to either create or edit the program of PLC, a PC is usually connected to it.
The PLC has a significant capability for real-world I/O connectivity. Most models of PLC feature a huge variety of interchangeable modules of I/O, which let for suitable interfacing with virtually any kind of laboratory or industrial equipment.
Mainly PLCs are programmed in a Ladder Logic. Ladder Logic is fundamentally a program of Boolean logic-solving with a graphical user interface planned to look like a basic wiring diagram, common to all electricians industry.

What is a HMI?
A HMI sometimes also known as a MMI. HMI is stand for Human to Machine Interface and MMI is stand for Man to Machine Interface. Even though MMI is not supposed to be politically correct now that term less and less.
The job of HMI is it to translate the signals and intentions from a human into signals of electric for the information system of machine to use. Therefore in doing so, lets the human operator to create interactive changes in the data and software process.
HMI its quite frequently has a display integrated into them as well to allow the operator to distinguish the relevant data to the action being carried out.

The computer evolution has and continues to have a big impact on the industry and society. We are in an amendment cycle with the current evolution of computer, but more significantly we are trying to amend to meet the transformations for the next decade. Software and hardware are persistently being improved. Computers are now more powerful and will ultimately give a human to machine interface.

While other tool is PLC hence and based supports interface. One of the equipment is said to be technology of Human Machine Interface based and is said that it does not comply for network interface or computer. It has a port of USB which can help to download data.

From the qualifications below are the some diversities between HMI and PLC
HMI:
1. There will be unit display in HMI with the buttons of function.
2. It is able to monitor what current happenings during executions.
3. HMI is able to operate in both manual and auto mode.
4. It is able to change the set point.
5. HMI is usually a touch screen of the PLC
PLC:
1. There is no unit display.
2. The user can not monitor what happening in the execution in the PLC.
3. PLC called as programmable logical circuit.
4. PLC running only in auto mode. User can not proceed if there is error during the operation till it repaired or corrected.
5. The set point can not be adjusted in PLC. If requires to be adjusted then the program license must be downloaded.

PLCs are inserted type controllers of ladder logic with set-points of programmable parameter for a control function of automation. Commonly, HMI is a PC based interface with frequently configurable software and broader functionality.

An HMI will need far bigger control and validation, and will be judged for the compliance of 21 FR pt11. It will all base on the HMI/software functionality that you have for the FBD. It would that it is unlikely the HMI can not be obsessed up to a PC or printer if you need it.

Hopefully this article can add your insights.
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All Labels

  1. ABB PLC
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  5. Analog Input
  6. Android
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  8. Android Bluetooth
  9. Audio and PLC
  10. Automatic Gates using PLC
  11. Baldor PLC
  12. Battery Level Indicator using PLC Analog
  13. BMS
  14. Building Management System
  15. Car Ticketing Machine using PLC
  16. CIMON PLC
  17. Click Series PLC
  18. Computer Vision
  19. Computer Vision and PLC
  20. Control Seven Segment Display with PLC
  21. Conveyor Control Using PLC
  22. CPU PLC
  23. CV and PLC
  24. CX-One
  25. DCS
  26. DDC
  27. DELMIA V5
  28. DeltaV
  29. Digital Input
  30. DirectLogic PLC
  31. DirectSOFT PLC
  32. Eaton PLC
  33. Elevator with PLC Program
  34. EPICS PLC
  35. Fatek PLC
  36. Festo PLC
  37. Fieldbus
  38. Forex Trading and PLC
  39. FPGA PLC
  40. GE Fanuc PLC
  41. GP proface
  42. GX Developer
  43. Heater Controller with PLC
  44. Hitachi PLC
  45. HMI
  46. Home Automation
  47. Honeywell PLC
  48. IDEC PLC
  49. Keyence PLC
  50. Koyo PLC
  51. LED Display
  52. LG PLC
  53. Lock Unlock Door Using PLC
  54. Logixpro PLC
  55. Maple OIT
  56. Matsushita PLC
  57. MELSEC A
  58. MELSEC Q
  59. Memory PLC
  60. Micro PLC
  61. MicroLogix 1000
  62. MicroSmart PLC
  63. Mitsubishi PLC
  64. Mobile Application
  65. Modbus
  66. ModBus Communication
  67. ModBus RTU
  68. ModBus RTU Communication
  69. Modicon PLC
  70. Momentum PLC
  71. Motion Control
  72. National Instruments PLC
  73. Omron PLC
  74. OPC
  75. PAC
  76. Panasonic PLC
  77. Parking Information using PLC
  78. Password Using PLC
  79. PLC
  80. PLC Analog Input Module
  81. PLC and Android
  82. PLC and Arduino
  83. PLC and CNC
  84. PLC and Computer
  85. PLC and Facebook
  86. PLC and PC
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  88. PLC and Visual Basic
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  90. PLC Beginner Guide
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  93. PLC Codesys
  94. PLC Companies List
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  100. PLC for Binding Machine
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  102. PLC for Filling Machine
  103. PLC for Fountain Application
  104. PLC for Injection Molding
  105. PLC for Marking
  106. PLC for Packing
  107. PLC for Rotary Bottle Washing
  108. PLC for Snack Vending Machine
  109. PLC for Sorter Machine
  110. PLC for Water Treatment
  111. PLC Hardware
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  113. PLC Information
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  116. PLC Link Model
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  121. PLC Simulator
  122. PLC Software
  123. PLC Supplier
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  126. PLC WorkShop
  127. PLC-ANALYZER
  128. PLCSIM
  129. Power Supply for PLC
  130. Profibus
  131. ProSafe PLC
  132. Push ON Push OFF with PLC
  133. Quickpanel Operator Interfaces
  134. Raspberry Pi
  135. Raspberry Pi and PLC
  136. Read Data
  137. RTU
  138. RTU and PLC
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  140. SCADA
  141. Schneider PLC
  142. SHARP PLC
  143. Siemens PLC
  144. Simple ModBus
  145. SINUMERIK CNC
  146. Small Modular PLC
  147. Standard Sequence Programming for PLC
  148. Substation Automation System
  149. Teco PLC
  150. Telemetry
  151. TEP PLC
  152. Texas Instruments PLC
  153. Timer Countdown with PLC
  154. Toshiba PLC
  155. Touch Screen PLC
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  157. TWIDO PLC
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  160. Unitronics PLC
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