클잼 로고

• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

We will use in this example the PC as MODBUS master. Thus, the master has only one input, MISO, rs485 cable which is the slave’s only output. You can easily connect more devices by splitting the cable at one connector and adding another cable to it. The existence of an RS485 port on the socket makes it even a little bit more difficult. It can be plugged into microcontroller dev boards with ComBoard serial port headers allow the serial port type to be easily changed. It controls the serial-to-parallel and parallel-to-serial conversion and performs all of the timing functions necessary for asynchronous serial communications. Serial 2 is implemented by a software UART in the controller’s QED-Forth Kernel that uses two of the processor’s PortA I/O pins to generate a serial communications channel. We recommend that you keep the faster Serial1 port as the default serial link as you work through the exercises in this book. CBL04 RS232 cable. Connects transmitter to PC com port. Connects CBL01 or CBL04 to PC USB port. TSX08PRGCAB can be used for Modicon TSX Series PLC of Schneider and PC or other equipment which provide the traditional RS232 serial port communications. Having a second serial port is also handy for system debugging.

Connects USB port of a PC to USB port of an LWIFI, LWIFIX or LNET1 communications board (ordering options A-D). Therefore for RS485 communications no crossover cable is used. The cable to be used is a shielded twisted pair (telephone type). To prevent noise to interfere with the communications, often twisted pair cable is used. CBL07 A to Mini-B USB cable. Please note: The jumper must be open for programming of the ESP8266 module via USB. Connects meter USB port to PC USB port. CBL01 RJ11-to-DB9 cable. Connects meter RS232 port to PC com port. Custom cable to connect the RS232 port of a PC to a Laureate meter with the RS232 option board (ordering option 1). Can be used with CBL02 to connect the USB port of a PC to a Laureate meter with an RS232 option board. Pin 1 and 6 however are reassigned to the A and B lines when the port is used in RS485 mode. 1 or 2 to specify Serial1 or Serial2, respectively, and clears the appropriate PORTJ bit to place the transceiver in receive mode.

The PE bit, with mask 0x02, determines whether the most-significant bit in each byte is used as a parity bit. Once the data has been exchanged, a flag bit in the SPSR status register is set to indicate that the transfer is complete. You can change the set temperature and ventilation level without RS485 connection also. These pins are normally used for the DTR, data terminal ready and DSR, data set ready signals. The RJ11 socket in the Unitronics PLCs provides six signal pins. When in full RS232 mode, the six available pins are assigned to the most used RS232 signals. When in RS485 mode, only in 1 and 6 are reassigned. The main difference is, that pin 1 and 6 on the RJ11 socket of the MJ20-PRG module are used as power supply. Half duplex. For LT transmitters, remove RJ11 connector. Hah, for five years from now I wanted to repurpose the RJ10 phone modem connector on my Dell notebook with a mini PCIe CAN/RS485 card and some extra cable. Discount 70% Offer UltraThin Acrylic Modern Square Led Ceiling Lights For Living Room Bedroom Lamparas De Techo Colgante Led Ceiling Lamp Fixture with FREE Worldwide Shipping Now! Allows a multi-point RS485 connection to Laureate meters with dual RJ11jacks and Laureate LT series transmitters with screw-clamp connectors.

Allows dual RJ11 jacks of the RS485 option board of Laureate meters (digital interface ordering option 2) to be daisy chained and be addressed digitally with no need for a hub. Used to daisy chain meters via RS485. The symmetrical pin layout of the RJ11 sockets on the Unitronics PLCs allows an easy way of interconnecting the PLCs with both RS232 and RS485 communications. The RS485 interface allows the creation of multi-point networks. The RS485 connection allows users to retrieve both level and temperature data, interface with a PC, and rescale the analog output from 10% to 110% of the basic range (converter cable and Keller software required). A symmetrical pin-layout allows two DTEs, data terminal equipment, to be connected directly without use of a modem or other DCE, data communication equipment. It combines two industry standard digital communication protocols (SDI-12 & RS485) and is suited for environmental monitoring applications using existing SDI-12 monitoring equipment.