Series introduction: with a variety of first type functions and communication interface standard model.
Screen size: 5.7 inches.
Display color: 256 color or more color.
Mounting type: panel mounting type.
Resolution: QVGA (320 x 240).
Display device: STN monochrome.
Host frame color: black.
Power type: DC24V.
With a built-in Ethernet communication interface.
Standard model with various pre - and communication interface HF-SN152J-S100
User storage capacity: 9MB.
Device USB interface.
Standard Ethernet, RS-422/485 and RS-232 interface.
The standard SD card interface.
According to the working principle of the touch screen and the transmission of information of the media, the touch screen is divided into four kinds,
They are resistive, capacitive, inductive, infrared, and surface acoustic waves.
Each touch screen has its own advantages and disadvantages, to understand which kind of touch screen to apply to what kind of occasion,
The key is to understand the working principle and characteristics of each type of touch screen technology. Input points: 16 points.
Voltage: DC100/110/125V.
Current: 2mA.
Response time: 20ms.
8 points / a common end.
Positive / negative sharing.
20 point terminal station.
System program memory for storing system program,
Including management procedures, monitoring procedures, as well as the user program to do the compiler to compile the process of interpretation.
Read only memory. Manufacturers use, content can not be changed, power does not disappear.
PLC selection with the development of PLC technology, more and more types of PLC products,
Function is becoming more and more perfect, and its application is more and more extensive.
Different series of different models of PLC has different performance, applicable occasions also have different emphasis,
Price also has a greater difference. Therefore PLC selection,
Under the premise of meeting the control requirements,
Should consider the best performance to price ratio, a reasonable choice of PLC.
Each scanning process. Focus on the input signal sampling. Focus on the output signal to refresh.
Input refresh process. When the input port is closed,
Program in the implementation phase, the input end of a new state, the new state can not be read.
Only when the program is scanned, the new state is read.
A scan cycle is divided into the input sample, the program execution, the output refresh.
The contents of the component image register are changed with the change of the execution of the program.
The length of the scan cycle is determined by the three.
CPU the speed of executing instructions.
Time of instruction.
Instruction count.
Due to the adoption of centralized sampling.
Centralized output mode.
There exist input / output hysteresis phenomena, i.e., the input / output response delay.
HF-SN152J-S100 Operation manual/Instructions/Model selection sample download link: /searchDownload.html?Search=HF-SN152J-S100&select=5