Design Human Machine Interfaces with PLC
If you want to design MMI/HMI to communicate with PLC ,please read article.
INTRODUCTION
• These control systems allow a much more interactive than ever before.
• The main purpose of the HMI a simple graphical user interface to the process.
• These devices are known, the number of names
-> Touch Screen
-> Exhibitions
-> Man Machine Interface (MMI)
-> Human Machine Interface (HMI)
• Provides a simple user displays used to determine the condition of the machine and SIM
PLEs settings.
• The most commonly used,
-> Display machine errors
-> View the status of equipment
-> Allows manual start / stop cycles
-> Monitor the first part
• These units offer certain advantages, such as
-> Color coding for easy identification (eg red for angry)
-> Images / icons allow quick recognition
-> Use of images makes the problems of illiteracy
530
-> The screen can be changed to allow different levels of information and access
• general implementation steps
1st Screen layout on the PC-based software.
2nd Download to your device screen HMI.
3rd Connect the device to the PLC.
4th Read and write access to the HMI using PLC memory locations to get input and update screens.
• To control the HMI from a PLC the user inputs set bits in the PLC memory and other bits
PLC memory can be set on / off elements on the screen HMI.
7.2 HMI / MMI DESIGN
• Joint development is a user interface that often
-> Icons
-> Pointing device (eg mouse)
-> Full color
-> Support for multiple windows, which run programs simultaneously
-> Pop-up menu
-> Windows can move, scale, moved, front / rear, etc.
• The demands on the user interface,
-> Online Help
-> Adaptive dialog / response
-> Feedback to the user
-> Ability to interrupt processes
-> The modules
-> Logical screen layouts
-> Assignment together with many processes
• To design, HMI, is the first step to identify
1st Who needs what information?
2nd How can they expect to present it?
3rd If no information is required?
4th If the operator you have any special requirements?
5th Is sound important?
6th What options should the operator?
