OPF-TH1000D/OPF-RH1000D User’s Guide226.4 Setting transmitter and receiver using setting modeThe OPF can be set and I/O statuses can be acquired with serial communication commands by settingRS-232C communication mode to the setting mode. You can set RS-232C to the setting mode by setting[C90] to “01” for the transmitter and by turning on DIP SW1 for the receiver.Connect a control device, such as PC, and the OPF-H1000D via an RS-232C cable in order to control theOPF using terminal software.Since the communication settings are fixed with setting mode as follows, set the terminal software accordingto the settings of the OPF-1000HD.Item SettingCommunication standard RS-232CBaud rate 9600 [bps]Data bit length 8 [bit]Parity check N/AStop bit 1 [bit]X parameter InvalidFlow control N/ADelimiter CR LF (0D and 0A in hex)Communication method DuplexSerial communication specification (in setting mode)Note: Use the proper RS-232C cable for the connected devices.【See 9.1.2 RS-232C】