ICPDAS ET-2268 CR User Manual page 4

ET-2200 Series Ethernet I/O Modules
4.17.2 SNMP Specific Trap ............................................................................................ 103
4.17.3 SNMP I/O Example ............................................................................................ 105
4.17.4 SNMP Trap Example .......................................................................................... 110
4.17.5 SNMP Problem Solving ...................................................................................... 112
5. I/O PAIR CONNECTION APPLICATIONS ............................................................................... 114
5.1 Set a Single Module to Pull/Push Mode (DI/DO) ............................................................. 114
5.1.1 Pull Mode .......................................................................................................... 116
5.1.2 Push Mode ......................................................................................................... 117
5.2 Set Two Modules to Push Mode (Local DI to Remote DO) .............................................. 118
5.3 Set Two Modules to Pull Mode (Remote DI to 2-Local DO) ............................................. 121
5.4 Set Two Modules to Push Mode (2-Local DI to Remote DO) ........................................... 124
5.5 Shared Memory ............................................................................................................... 127
5.5.1 Address Mapping for Shared Memory .............................................................. 128
5.5.2 Application of spreading the load (DIO) ............................................................ 129
5.5.3 Example of Using Memory AIO ......................................................................... 131
5.5.4 Master/Slave/MTCP/MUDP Data Exchange ...................................................... 133
5.5.5 Bits / Registers Data Exchange .......................................................................... 134
6. MODBUS INFORMATION ................................................................................................... 135
6.1 What is Modbus TCP/IP? .................................................................................................. 135
6.2 Modbus Message Structure ............................................................................................. 136
6.2.1 01(0x01) Read the Status of the Coils (Read DO Readback values) ............... 139
6.2.2 02(0x02) Read the Status of the Input (Read DI values) ................................... 141
6.2.3 03(0x03) Read the Holding Registers (Read AO Readback values ) ............... 143
6.2.4 04(0x04) Read the Input Registers (Read AI values) ......................................... 145
6.2.5 05(0x05) Force a Single Coil (Write DO value) .................................................. 147
6.2.6 06(0x06) Set a Single Register (Write AO value) ............................................... 149
6.2.7 15(0x0F) Force Multiple Coils (Write DO values) .............................................. 151
6.2.8 16(0x10) Set Multiple Registers (Write AO values) ........................................... 153
6.3 Modbus Register Table (For DIO Module) ........................................................................ 155
6.3.1 Common Functions ........................................................................................... 155
6.3.2 Specific Functions .............................................................................................. 157
6.4 Modbus Register Table (For AIO Module) ........................................................................ 161
6.4.1 Modbus Register Table for (P)ET-2217 .............................................................. 161
6.4.2 Modbus Register Table for ET-2217CI ................................................................ 164
6.4.3 Modbus Register Table for (P)ET-2224/2228..................................................... 167
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