Firstly, CL57T is stepper driver, not a controller. As a stepper driver, it don’t have any controlling function.
Secondly, for debugging purpose, this driver can be debugged through RS232, you can modify below specification through RS232 cable:
a. Peak Current
b. Closed-loop holding current percentage
c. Position tracking error
Finally, to control the stepper motor, you will need a controller, and you can find the supported communication protocols at controller’s manual.