Features: It supports communication YAMAHA Robot Controller. Support Unit: RCX340, RCX-Studio Support Device: DI (Parallel input variable) DO (Parallel output variable) MO(Internal output variable) LO (Arm lock output variable) TO (Timer output variable) SI (Serial input variable) SO (Serial output variable) SIW (Serial word input) SID (Serial double word input) SOW (Serial word output) SOD (Serial double word output) WHERE (Arm current position (pulse coordinate)) WHRXY (Arm current position (Cartesian coordinates))