12-30-2025, 02:47 PM
(12-30-2025, 01:01 PM)Petr Wrote: Can you share the manual for this here? I don't promise anything, but I think it will be treated like a regular COM port, even though it goes through a USB adapter, if I understand correctly. Then you need to set the COM port number the same as in the program. Give me the manual, I don't promise anything, but I'll try.
Thanks Petr for Your intention.
This is from the Ali website:
Parameters:
Working voltage: DC 8~30V
Working current: 14-25MA
MODBUS RTU protocol, 03 read command, 06 or 16 write command.
Serial baud rate: 9600 (default), N, 8, 1
By modifying the 485 address, 247 modules can be cascaded at most (use R485 repeaters for more than 16)
Readable temperature and PT100 resistance value
Adaptive sensor: PT100 3-wire or 2-wire sensor
Temperature measurement range: Type A - 40 ℃ to+220 ℃; Type B - 40 ℃ to+500 ℃.
It is recommended to select a version with a smaller range within the range that meets the measured value.
Temperature measurement accuracy: 1%
For MODBUS RTU protocol, please refer to: PTA8D08 8CH PT100 RS485 sensor protocol
And so I found following link:
https://485io.com/eletechsup/PTA8D08-1.rar
Rudy M
