r232

. Suspected that the output of the ic201 (om8838) out-of-band waveform is incorrect. The 3-13 Line Backward pulse transmission circuit is true. Check the external circuit components related to the formation of the sawtooth wave, as shown in 3-14, and find the r232 (39 K) increase the resistance to 60 K. In the process of generating a circuit with a saw-tooth wave, the resistance value of r133 directly affects the reference current value of c231 chargi

timeout? C> Can I balance the speed at which commands are sent with the speed at which data is returned? First, you should know that multiple collection devices are connected to the same serial port through the serial rw.bus, while the bus can only allow one device to send data at a certain time, and all other devices can receive the data. There are three prerequisites for concurrent serial communication: A> using r485 bus instead of r232; B> mul

The Arduino pro mini is a micro-control panel based on atmega328 and supports 5 V/3.3v voltages. However, the default voltage is 5 V. How can we make this board support 3.3v voltage. Preparations 1. If you have never used Arduino, You need to download the IDE first. The installation method is not described here. 2. Prepare two board boards, one of which is our Arduino pro mini target board and the other is the Arduino board used to burn the target board, this article uses the same Arduino pro mi

Many boards, have seen a chip with CPLD, such as I have seen a R232 level conversion board on the use of the epm240t controller.It was strange to see, what to do, and then think about the level of 232 required is not provided by epm240t. After trying to understand it, it's like talking about such a processor before. Development methods, uses, future trendsCPLD: Development environment Quarctus SoftwareDevelopment language: VHDL and Verilog languageFor

,response, "1570,00,00,00,00,00,00;connect28800 ----The following values are described: ----15 ----1: A byte, where 1 indicates that the following two sets of DWORD (80,70,00,00 and 00,00,00,00) values are 16, and if 0 or not, the following two sets of DWORD are strings. ----02: A Byte, where 2 indicates successful connection "connect". ----00: A byte, which is only useful if the last byte is 01 (negotiation Progress) or (Connect). 00 indicates no Error control and no Compression. ----80,70,00,0

PLC, my understanding is the microcomputer, but can be used in more demanding environment.2. How to AchieveThe data communicates with the computer via Modbus, using USB to R232 and then R485 hardware implementation. This is to prepare the driver in advance, I use Yu Tai Lian UT-8801 usb to serial port, drive.Modbus has two lines of communication, measuring the two-wire voltage should be around 0.11VThe device data is then read through the Modbus prot