A meter will a thermocouple input and set for Modbus RTU needs to set to full duplex even if the wiring and the receiving unit are for half duplex. If multiple analog input meters or transmitters are digitally addressed in command mode on an RS485 line using the Modbus RTU protocol or the Custom ASCII protocol, the rate becomes about 2 readings per second. With Modbus RTU, sending and receiving are never simultaneous, so half duplex is as fast as full duplex. Half duplex has the advantage of only using three wires: ARX/ATX, BRX/BTX and GND. In all other cases, half duplex and full duplex will work equally well. Both will work with RJ11 connectors and CBL03 cables. This MJ20-PRG module clicks in the PLC and provides one RJ11 socket for serial communications with a PC. The main difference is, that pin 1 and 6 on the RJ11 socket of the MJ20-PRG module are used as power supply. This cable provides a USB type A connector for the PC end and an RJ11 connector for the meter end. What cable should I use to connect meters with an RS485 port to the USB port of a PC? After several frustrating days of trying different combinations of RS485 hats, different wiring connections, with and without termination resistors and ordering a USB RS485 adapter which would also fail to connect, we tried to install the Data logging WiFi adapter.
These cables allow the dual RJ11 jacks of the RS485 option board of Laureate meters (digital interface ordering option 2) to be daisy chained and to be addressed digitally with no need for a hub. Laureate RS485 boards are available in versions with dual RJ11 jacks (ordering option 2, board P/N L485) and with dual RJ485 jacks (ordering option 4, board P/N LMOD). If the PC is connected to the multiple Laureate instruments on an RS485 bus via an Ethernet-to-RS-485 gateway board or a USB-to-RS485 gateway board, use Laurel’s free XLOG2 datalogging software. The board with dual RJ11 jacks is the more popular since is can use commercial straight-through, non-reversing, 6-wire data cables with RJ11 connectors. PCs are normally not equipped with an RJ11 socket for serial RS232 communications. The existence of an RS485 port on the socket makes it even a little bit more difficult. Removing the WiFi adapter and connecting directly to the inverter's COM port resulted in no data again so we knew that there was something on the WiFi adapter enabling the data from the inverter. I plugged the male-male adapter to the cable and touched the middle pin again, and I could see garbage data again.
You should now be able to see all connected stacks in the Brick Viewer. See page 7 of the Laurel digital panel meter manual, page 7 of the Laurel counter manual, page 8 of the Laurel scale meter manual, or page 8 of the Custom ASCII protocol manual. Using the Solis Data Logging Stick, which uses WiFi to communicate, we were able to set up the inverter to send data to the remote soliscloud service, but we could not find any way to get capture data apart from scraping the basic status page built into the WiFi adapter which only gave watts being produced and daily output. Laureate meters are modular with a middle slot reserved for a communication board, as illustrated in our Laureates Overview web page. The solution is provided by the Laureate DIN rail mounted breakout board, which provides two RJ11 jacks with six screw clamp terminals all wired in parallel. A challenge is that Laureate meters use RJ11 jacks, while Laureate LT series transmitters use screw-clamp connectors for three discrete wires. RS485 is specified for multi-point communicates where multiples devices have their own address on the same communication line, while RS232 is only specified for point-to-point communications.
This module is powered by the RS232 port from the connecting computer. This adaptor connects to the Xwire port on any SPLat controller and converts it to an RS485 interface. When the DSR and DTR signals are not used, the two pins can be used for simultaneous RS485 communication. For RS232 a crossover cable is used where pin 1 is connected with pin 6 at the other connector, pin 2 with pin 5, etc. This interconnects the transmit and receive signals of both PLCs, and also the handshaking signals DTR and DSR. Normally pin 7 (RTS) and pin 4 (DTR) are used on the DB9 connector. The ComBoard RTS input line controls the driver enable line so the device only talks when it is its turn. Another thing I've done is connecting the slave device to to the SENA RS485 adapter, and use the metal piece on the pins, the middle pin of the adapter, when touching the metal, makes the TX led turn on.
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Ten Romantic Rs485 Cable Vacations
by Marguerite Fullarton (2024-06-21)
A meter will a thermocouple input and set for Modbus RTU needs to set to full duplex even if the wiring and the receiving unit are for half duplex. If multiple analog input meters or transmitters are digitally addressed in command mode on an RS485 line using the Modbus RTU protocol or the Custom ASCII protocol, the rate becomes about 2 readings per second. With Modbus RTU, sending and receiving are never simultaneous, so half duplex is as fast as full duplex. Half duplex has the advantage of only using three wires: ARX/ATX, BRX/BTX and GND. In all other cases, half duplex and full duplex will work equally well. Both will work with RJ11 connectors and CBL03 cables. This MJ20-PRG module clicks in the PLC and provides one RJ11 socket for serial communications with a PC. The main difference is, that pin 1 and 6 on the RJ11 socket of the MJ20-PRG module are used as power supply. This cable provides a USB type A connector for the PC end and an RJ11 connector for the meter end. What cable should I use to connect meters with an RS485 port to the USB port of a PC? After several frustrating days of trying different combinations of RS485 hats, different wiring connections, with and without termination resistors and ordering a USB RS485 adapter which would also fail to connect, we tried to install the Data logging WiFi adapter.
These cables allow the dual RJ11 jacks of the RS485 option board of Laureate meters (digital interface ordering option 2) to be daisy chained and to be addressed digitally with no need for a hub. Laureate RS485 boards are available in versions with dual RJ11 jacks (ordering option 2, board P/N L485) and with dual RJ485 jacks (ordering option 4, board P/N LMOD). If the PC is connected to the multiple Laureate instruments on an RS485 bus via an Ethernet-to-RS-485 gateway board or a USB-to-RS485 gateway board, use Laurel’s free XLOG2 datalogging software. The board with dual RJ11 jacks is the more popular since is can use commercial straight-through, non-reversing, 6-wire data cables with RJ11 connectors. PCs are normally not equipped with an RJ11 socket for serial RS232 communications. The existence of an RS485 port on the socket makes it even a little bit more difficult. Removing the WiFi adapter and connecting directly to the inverter's COM port resulted in no data again so we knew that there was something on the WiFi adapter enabling the data from the inverter. I plugged the male-male adapter to the cable and touched the middle pin again, and I could see garbage data again.
You should now be able to see all connected stacks in the Brick Viewer. See page 7 of the Laurel digital panel meter manual, page 7 of the Laurel counter manual, page 8 of the Laurel scale meter manual, or page 8 of the Custom ASCII protocol manual. Using the Solis Data Logging Stick, which uses WiFi to communicate, we were able to set up the inverter to send data to the remote soliscloud service, but we could not find any way to get capture data apart from scraping the basic status page built into the WiFi adapter which only gave watts being produced and daily output. Laureate meters are modular with a middle slot reserved for a communication board, as illustrated in our Laureates Overview web page. The solution is provided by the Laureate DIN rail mounted breakout board, which provides two RJ11 jacks with six screw clamp terminals all wired in parallel. A challenge is that Laureate meters use RJ11 jacks, while Laureate LT series transmitters use screw-clamp connectors for three discrete wires. RS485 is specified for multi-point communicates where multiples devices have their own address on the same communication line, while RS232 is only specified for point-to-point communications.
This module is powered by the RS232 port from the connecting computer. This adaptor connects to the Xwire port on any SPLat controller and converts it to an RS485 interface. When the DSR and DTR signals are not used, the two pins can be used for simultaneous RS485 communication. For RS232 a crossover cable is used where pin 1 is connected with pin 6 at the other connector, pin 2 with pin 5, etc. This interconnects the transmit and receive signals of both PLCs, and also the handshaking signals DTR and DSR. Normally pin 7 (RTS) and pin 4 (DTR) are used on the DB9 connector. The ComBoard RTS input line controls the driver enable line so the device only talks when it is its turn. Another thing I've done is connecting the slave device to to the SENA RS485 adapter, and use the metal piece on the pins, the middle pin of the adapter, when touching the metal, makes the TX led turn on.
In case you loved this informative article and you would want to receive more details regarding rs485 cable kindly visit the web site.