AC Servo Driver T6

[Coral]

Hello,
For several days, I've been trying to download an AC servo driver from oyostepper websiteand drive a servo motor using Modbus RTU, but I've been unsuccessful. My goal is to have the motor rotate in a single direction at a set speed (until the stop button is pressed again).
After studying the servo driver's datasheet, I'm no longer sure if I can have the motor rotate indefinitely in speed mode or if it must always follow a "path."
I connected a human interface (HMI) to the servo driver's CN4 port (pins 1, 2, and 8) via COM0 Pin1 RX-(B), Pin6 RX+(A), and Pin5 (GND).
I created the HMI in DTools and set COM0 to RS485 mode. The baud rate was set to the driver's default of 38400 8N2. The Modbus address defaulted to 1.
I then placed a Digital Component on Frame 0 and set it to address 24619, address type RWI.
According to the servo drive's datasheet, this address is the command position—so it should be used for control:
Pr 8.43 Command Position L 0X602B
I think you can tell that this is my first time doing this and I still have a lot of questions about the whole PLC world. I really want to get this controller up and running and learn more about this topic.
Do you have any recommendations for books, courses, or online courses on PLC technology?