Ch ap te r 8 Ser ia l C ommu nic a tion Mod ule AH1 0/15 SC M8 - 6 58.8 Error FlagsThe error flags and the UD Link statuses are stored in data registers. Users can modify the inputdevice range by themselves.Data register DescriptionD0 Error codeD1 Hardware failureD2 An error occurs when the communication protocol for exchanging datathrough COM1 is UD Link.D3 An error occurs when the communication protocol for exchanging datathrough COM2 is UD Link.D4 An error occurs when the communication protocol for exchanging datathrough COM1 is Modbus.D5 An error occurs when the communication protocol for exchanging datathrough COM2 is Modbus.D6 An error occurs when data is exchanged through COM1.D7 An error occurs when data is exchanged through COM12D8 Internal communication errorD9 The group which is triggered when the communication protocol forexchanging data through COM1 is ModbusD10 The group which is triggered when the communication protocol forexchanging data through COM2 is ModbusD11 The command which is executed when the communication protocol forexchanging data through COM1 is UD LinkD12 The command which is executed when the communication protocol forexchanging data through COM2 is UD LinkD13 The packet which is sent/received when the communication protocol forexchanging data through COM1 is UD LinkD14 The packet which is sent/received when the communication protocol forexchanging data through COM2 is UD LinkD15 ReservedD16 ReservedD17 Reserved
