rs485 pinout

test points, the relevant design requirements are as follows:(1) test points evenly distributed across the entire PCB, it is generally required that each network must have at least one Test probe to contact the testing point.(2) Priority of the test point selection: preferably a round pad, followed by the device pinout, the last hole is the most test point. SMD devices preferably using a circular pad to do test points, OSP processing process PCB shou

strict accordance with the CE,CCC and other domestic and foreign electronicproduct certification standards, fully consider the integrity of high-speed signal and other electromagnetic compatibility measures to ensure OK6410 Development Board inReliable operation in harsh electromagnetic environments.OK6410 the software system currently supports WinCE 6.0 , LINUX2.6.28 , Android2.1 as wellUc/os-ii , a standard board-level support package ( BSP ) and open source, which contains all the drivers of

design. Gated clocks are typically generated by a counter divider. Use the clock resources provided by the FPGA as much as possible, using DCM as Deskew.Offset constraint not satisfiedThe first thing to do is to ensure that offset is written correctly.Then ensure that the input/output data into the FPGA in the register with a beat, the middle do not add the combination of logic. Register pack to IOB to ensure that the offset constraint is met to the maximum extent possible. (Similarly, as menti

, which takes less than 6 microseconds to wake the microcontroller from Stop mode. Memory and package options: 　 prior to the stm32f105 and STM32F107 Interconnect series microcontrollers, STMicroelectronics has launched the STM32 Basic series, enhanced series, USB basic series and enhanced series, and the new series is based on the 72MHz processing frequency of the enhanced series. Memory includes 64KB to 256KB Flash and 20KB to 64KB embedded SRAM. The new series is available in three packages o

syntax in the process management area to check whether there is a syntax error. 9. Double-click synthesize-XST to complete integration. 10. Select simulation in view, right-click the project management area, select new source, select maid, and enter file name 11, 12, 13. Enter the test code. In this example, it is in the red line area of the customer zone. Other examples are not required! 14. Right-click the simulate behavioral model and select Properties to set simulation parameters. 15

In industrial control, Industrial Computer (generally based on Windows) often needs to communicate with smart meters through serial ports. Serial Communication is convenient and widely used.Generally, the Industrial Computer communicates with each smart meter through RS485 bus. The RS485 communication mode is half-duplex and can only be round-robin by the industrial control PC as the master node on each Int

Source: http://blog.csdn.net/bichenggui/article/details/7889638 Recently, a data center solution based on grps dtu data transmission needs to be developed, so I found some materials. I personally think it is very useful. Gprs dtu is the full name of the GPRS data transmission unit. Currently, there is a more explicit Convention on gprs dtu in China: gprs dtu is specially usedSerial Port DataPassGPRSNetworkThe GPRS wireless device for transmission. Four core functions of gprs dtu: 1) internal int

In industrial control, Industrial Computer (generally based on Windows) often needs to communicate with smart meters through serial ports. Serial Communication is convenient and widely used.Generally, the Industrial Computer communicates with each smart meter through RS485 bus. The RS485 communication mode is half-duplex and can only be round-robin by the industrial control PC as the master node on each Int

processing control procedures. Therefore, communication between a single-chip microcomputer and a single-chip microcomputer or a host computer is usually established through RS232 or RS485. These networks have problems such as slow communication speed, poor networking functions, and difficult development. Industrial Ethernet has been gradually improved and more applications are available in the industrial control field. Industrial Ethernet uses TCP/I

1. Serial numbers cannot be sent and received continuously during RS485 usage. At first, the problem was that the TX of maxcompute needs to be connected to the pulling resistance, and 20 K of the large resistance cannot be used. Using a strong pulling resistance of less than 10 can solve the problem. Later I found the problem. When the number of 0 s exceeds 10, I found that the problem was caused by the high common mode voltage. I handled the two 48

Three ways of Siemens PLC serial communication time: 2015-10-25-14:31:55 Edit: Electrician section: Siemens PLC Introduction: Siemens PLC serial communication Three ways, divided into RS485 serial communication, PPI Communication, MPI communication, free port mode Siemens PLC and the computer serial communication, S7-200 Series PLC communication port 3 kinds of working methods.Three ways of Siemens PLC serial communication1,

) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/73/12/wKiom1Xzy2zDun-HAAJ4GrYTKhk376.jpg "style=" float: none; "title=" Image 2.png "alt=" Wkiom1xzy2zdun-haaj4grytkhk376.jpg "/>Then find the manufacturers and models, call the manufacturer phone advice how to increase the administrator.How to connect to the machine, how to wireConnected to the machine in the following two ways1. network Settings IP address (machine IP is not the default, no administrator can not see IP information) 2.

1.1 Application ScenariosThe interaction object of communication platform includes two aspects: first, interacting with hardware products. Second, interacting with software products. Basically these two aspects, communication platform will generally be used in two scenarios:1) Communication platform application on PCMainly used in the automatic station of the industrial computer, through rs485/rs232, RJ45, 4-20ma and other ways to collect data informa

1.rs232 levelOr the serial level, some even say the computer level, all these statements, refers to the computer 9-pin serial port (RS232) level, using negative logic,-15v ~ -3V Rep 1+3V ~ +15v Rep 02.rs485 and RS422 levelSince both use differential transmission (balanced transmission), so they are level mode, generally have two pin, a, bVoltage difference between the sending side AB+2 ~ +6v:1-2 ~ -6v:0Voltage difference between the receive-side ABGre

1. After installing the PLC programming software Step 7 microwin on Windows 7, can the communication between the programming software and the PLC fail? Cause: Step 7 microwin does not support win7 very well Solution: Install the Virtual Machine in win7, the XP system in the virtual machine, and step 7 microwin under XP 2. One-way data transmission: the PLC sends correct data to PC serial 1 (baud rate 9600), but two-way data transmission: PC serial 1 sends data to PLC first. After the

VC + + Serial Communication programming detailedReprint Address: http://www.jizhuomi.com/software/309.htmlIn industrial control, industrial computer (usually based on Windows platform) often need to communicate with the intelligent instrument through the serial port. Serial communication is convenient and easy to use and widely used.In general, the industrial computer and the intelligent instrument through the RS485 bus communication.

I. SuperIO communication mechanism. SuperIO Communication Mechanism1.1 application scenarios Communication Platform interaction objects include two aspects: first, interaction with hardware products. 2. Interaction with software products. Generally, communication platforms are used in two scenarios: 1) The communication platform is applied to PCs. It is mainly used in automatic station industrial computer to collect data of hardware devices through RS485