7 Application Instructions API 50-99 DVP-PLC APPLICATION MANUAL 7-107 Flag Function Action M1125 Receiving status cleared. When M1125 = On, the waiting for receiving status of PLC will be cleared. You have to reset M1125 to Off after the staus is cleared. Set up and reset by the user. M1126 User/system defined STX/ETX selection of RS instruction (see the next table for details.) M1130 User/system defined STX/ETX selection of RS instruction (see the next table for details.) M1127 Data transmission is completed for communication instructions (RS instruction not included) Set up automatically by the system; reset by the user. M1128 Data being sent/received indication By the systme.
M1129 Receiving time-out. If you already set up a communication time-out in D1129 and the data have not been received completey when the time-out set is reached, M1129 will be On. You have to reset M1129 to Off after the problem is solved. Set up automatically by the system; reset by the user. M1131 On when the data are converted into hex of MODRD/RDST/MODRW instructions when in ASCII mode; otherwise, M1131 is Off. By the system M1140 Data receiving error of MODRD/MODWR/MODRW instructions M1141 Parameter error of MODRD/MODWR/MODRW instructions M1142 Data receiving error of VFD-A handy commands M1143 ASCII/RTU mode selection (used with MODRD/MODWR/MODRW instructions).
On = RTU; Off = ASCII Set up and reset by the user. M1161 8/16-bit mode selection. On = 8-bit; Off = 16-bit Special register Function D1038 Delay time of data response when PLC is SLAVE in RS-485 communication, Range: 0~10,000. (Unit: 0.1ms). D1050~D1055 After MODRD / RDST is executed, the PLC will automatically convert the ASCII data in D1070~D1085 into Hex data and stores the 16-bit Hex data into D1050~D1055 D1070~D1085 When the PLC’s RS-485 communication instruction receives feedback signals, the data will be saved in the registers D1070~D1085 and then converted into Hex in other registers. The RS instruction is not supported.
D1089~D1099 When the PLC’s RS-485 communication instruction sends out data, the data will be stored in D1089~D1099. Users can check the sent data in these registers. RS instruction is not supported D1120 RS-485 communication protocol. Refer to the following table in point 4 for protocol setting. D1121 PLC communication address when PLC is a slave.