Answer: A, mm/s.
The units of the "V< Speed >" parameter in the MOVL instruction are A, mm/s.
Because the MOVL instruction is an instruction for linear motion control, where the V< Speed > parameter specifies the speed of motion. In the Siemens Sinumerik series of PLCs, linear motion control commands include MOVL, MOMOL and MOVS. The MOVL instruction is used to assign a 32-bit real number to the length or target position of a linear motion, while the V< velocity > parameter controls the speed of the linear motion in mm/s. Therefore, the answer is A, mm/s.