Wuhan Raycus Fiber Laser Technologies Co., LtdUser Guide RFL-A2000D-3000D Ver.1.023We have sensor to monitor the operation conditions of the laser, if any abnormal conditionoccurs, the laser will be stopped, and error information will be sent out from the RS-232 port.The control system in the laser also records the errors, which will be shown in the systemself-check in hyper terminal mode. Refer to 4.7.3Operation in Hyper Terminal Mode fordetails.4.6 Entering a Control ModeThe following diagram shows the process of entering a certain control mode.Connect powersupply and interfacesSwitch on thelaserSwitch on thelaser24V is applied betweenAD/RS and EGND of the‘CONRTOL’ cableAD/RS of the‘CONRTOL’ cableis left disconnectedTurn the switch to the‘REM’ positionTurn the switch to the‘ON’ positionTurn the switch to the‘REM’ positionTurn the switch to the‘ON’ positionAD mode HyperterminalmodeHyperterminalmodeRS-232modeFigure 10: The Process of Entering Different Control ModesIf you want to enter hyper terminal mode, you must turn the key to the “ON” position; ifyou want to enter a remote control mode, you must turn the key to the “REM” position. Whetheryou enter AD mode or RS-232 mode depends on 24V is applied to PIN7 and PIN9 of the“CTRL-INTERFACE” or not.