9 Application Instructions API 150-199 Registers (D0) for PLC1 received data (responding messages): 3. RTU Mode: When PLC1 is connected to PLC2 When M0 = On, function code 05 (bit On) of MODRW instruction will start to be executed. PLC1 PLC2, PLC1 sends: “ 01 05 0500 FF00 8C F6 ” PLC2 PLC1, PLC1 receives: “ 01 05 0500 FF00 8C F6 ” Registers for PLC sent data (sending messages): Registers (D0) for PLC received data (responding messages): When M10 = Off, function code 05 (bit Off) of MODRW instruction will start to be executed. PLC1 PLC2, PLC1 sends: “ 01 05 0500 0000 CD 06 ” PLC2 PLC1, PLC1 receives: “ 01 05 0500 0000 CD 06 ” Registers for PLC sent data (sending messages):
DVP-PLC Application Manual 9-15 Register DATA Explanation D1070 low ‘0’ 30 H ADR 1 ADR 0 Address of connected device: ADR (1,0) D1070 high ‘1’ 31 H D1071 low ‘0’ 30 H CMD 1 CMD 0 Command code: CMD (1,0) D1071 high ‘5’ 35 H D1072 low ‘0’ 30 H Starting data address D1072 high ‘5’ 35 H D1073 low ‘0’ 30 H D1073 high ‘0’ 30 H D1074 low ‘0’ 30 H Request bit On/Off D1074 high ‘0’ 30 H D1075 low ‘0’ 30 H D1075 high ‘0’ 30 H D1076 low ‘F’ 46 H LRC CHK 1 Error checksum:
LRC CHK (0,1) D1076 high ‘5’ 35 H LRC CHK 0 Register DATA Explanation D1256 low 01 H Address D1257 low 05 H Function D1258 low 05 H Starting data address D1259 low 00 H D1260 low FF H Set bit On/Off Request bit ON/OFF D1261 low 00 H D1262 low 8C H CRC CHK Low D1263 low F6 H CRC CHK High Register DATA Explanation D1070 low 01 H Address D1071 low 05 H Function D1072 low 05 H Starting data address D1073 low 00 H D1074 low FF H Set bit On/Off Request bit ON/OFF D1075 low 00 H D1076 low 8C H CRC CHK Low D1077 low F6 H CRC CHK High Register DATA Explanation D1256 low 01 H Address D1257 low 05 H Function D1258 low 05 H Starting data address D1259 low 00 H