Learn how to connec a RedLion Modbus RTU Slave to Modbus Master. In this scenario, the Modbus Slave would be the RedLion via RS232 comm port, and the Modbus Master would be my laptop.
Like any modern laptop, I do not have a serial port on my laptop, so I had to use USB to serial cable made by Profilic. See image below.
You will also need a DB9 to RJ12 cable.
Connect the USB to serial and the DB9 to RJ12 cable using null modem connector (orange connector). I had to use a gender bender as well (yellow connector).
Connect RJ12 to the Red Lion RS232 port.
I have a Modbus Master simulator setting as follows.
These are the results. The red boxes are hexidecimal number and the orange box is decimal floating numbers.
Here is another test result.