Last modified by Karry Zhuang on 2024/07/11 11:58
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... ... @@ -154,6 +154,10 @@ 154 154 ))) 155 155 156 156 ((( 157 + 158 +))) 159 + 160 +((( 157 157 **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1 158 158 ))) 159 159 ... ... @@ -295,30 +295,47 @@ 295 295 296 296 === 1.3.4 How to configure and output commands for RS485 to USB === 297 297 302 +((( 298 298 This step is not necessary, it is just to show how to use a normal RS485 to USB adapter to connect to the meter to check the input and output. This can be used to test the connection and RS485 command of the meter without RS485-LN. 304 +))) 299 299 306 +((( 300 300 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter. 308 +))) 301 301 310 +((( 302 302 Open the serial port debugging, set the send and receive to HEX. 312 +))) 303 303 314 +((( 304 304 Baud rate: 9600 316 +))) 305 305 318 +((( 306 306 check digit: Even 320 +))) 307 307 308 308 [[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="800" width="600"]] 309 309 310 310 USB 311 311 326 + 312 312 [[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="800" width="600"]] 313 313 314 314 USB 315 315 331 + 332 +((( 316 316 The configuration command is consistent with the AT command, input the hexadecimal command directly into the serial port, and the serial port will output the command. 334 +))) 317 317 318 -Example:input:01 03 00 31 00 02 95 c4 336 +((( 337 +**Example:** input:01 03 00 31 00 02 95 c4 338 +))) 319 319 320 -{{{ output:01 03 04 00 00 00 42 7A 02 321 -}}} 340 +((( 341 + output:01 03 04 00 00 00 42 7A 02 342 +))) 322 322 323 323 [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]] 324 324 ... ... @@ -328,7 +328,9 @@ 328 328 329 329 If users need to read the parameters of multiple energy meters, they need to modify the device address, because the default device address of each energy meter is 01. 330 330 352 +((( 331 331 Set the device address according to the parameters in the appendix of the MODBUS communication protocol. 354 +))) 332 332 333 333 [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]] 334 334 ... ... @@ -336,13 +336,19 @@ 336 336 337 337 [[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="800" width="600"]] 338 338 339 -[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height=" 800" width="600"]]362 +[[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]] 340 340 364 +((( 341 341 First of all, since the default device address of the energy meter is 01, the configuration of two energy meters will conflict, so we first connect an energy meter and configure the device address. 366 +))) 342 342 368 +((( 343 343 We can use AT+CFGDEV to set the device address. 370 +))) 344 344 372 +((( 345 345 We modify the device address 01 of the first energy meter to 02. 374 +))) 346 346 347 347 [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]] 348 348