![background image](http://html1.mh-extra.com/html/icp-das-usa/ins-316/ins-316_user-manual_3554946003.webp)
iNS-316 User Manual
Copyright
©
2022 ICP DAS CO., Ltd. All Rights Reserved.
- 3 -
7.1 What is Modbus TCP/IP? ...................................................................................................... 43
7.2 Modbus Message Structure ................................................................................................. 44
7.2.1 01(0x01) Read the Status of the Coils (Read DO Readback vaslues) ......................
7.2.2 02(0x02) Read the Status of the Input (Read DI values) ......................................... 47
7.2.3 03(0x03) Read the Holding Registers (Read AO Readback values ) ........................ 48
7.2.4 04(0x04) Read the Input Registers (Read AI values) ............................................... 49
7.2.5 05(0x05) Force a Single Coil (Write DO value) ........................................................ 50
7.2.6 06(0x06) Set a Single Register (Write AO value) ..................................................... 51
7.2.7 15(0x0F) Force Multiple Coils (Write DO values) .................................................... 52
7.2.8 16(0x10) Set Multiple Registers (Write AO values) ................................................. 53