Chao at 09:50, 9 September 2021

2021-09-09T09:50:48Z

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== Windows Master Software ==
* ModScan
* ModbusPull

== Command ==
* (Device address 1byte) + (CMD code 1byte) + (register address 2bytes) + (register data 2bytes) + CRC code (2bytes)

* [[CRC]] check by CRC-16/MODBUS

{| class="wikitable sortable"
|-
! Full CMD !! ADDR. !! CMD !! register address !! register data !! CRC !! Return
|-
| FF / 10 / 03 E9 00 01 02 00 / 02 / 4A 0C || FF || 10 - set baudreate || 03 E9 || 00 01 02 00 02 - 4800 || CRC || FF 10 03 E9 00 01 C5 A7
|-
| FF / 10 / 03 E9 00 01 02 00 / 02 / 8B CC || FF || 10 - set baudreate || 03 E9 || 00 01 02 00 03 - 9600 || CRC || FF 10 03 E9 00 01 C5 A7
|-
| FF / 10 / 03 E9 00 01 02 00 / 03 / CA 0E || FF || 10 - set baudreate || 03 E9 || 00 01 02 00 04 - 19200 || CRC || FF 10 03 E9 00 01 C5 A7
|-
| FF / 01 / 00 00 / 00 08 / 28 12 || FF || 01 - read relay status || 00 00 || 00 08 || CRC || FF 01 01 01 A1 A0 - 4st byte for 8 relay status
|-
| FF / 02 / 00 00 / 00 08 / 6C 12 || FF || 02 - read optical coupler status || 00 00 || 00 08 || CRC || FF 02 01 01 51 A0
|-
| FF / 03 / 03 E8 / 00 01 / 11 A4 || FF || 03 - read baudrae || 03 E8 || 00 01 || CRC

|-
| FF / 05 / 00 00 / 00 00 / D8 14 || FF || 05 - relay control || 00 00 - relay 0 || 00 00 - relay OFF || CRC
|-
| FF / 05 / 00 00 / FF 00 / 99 E4 || FF || 05 - relay control || 00 00 - relay 0 || 00 00 - relay ON || CRC

|-
| FF / 05 / 00 01 / 00 00 / 89 D4 || FF || 05 - relay control || 00 01 - relay 1 || 00 00 - relay OFF || CRC
|-
| FF / 05 / 00 01 / FF 00 / C8 24 || FF || 05 - relay control || 00 01 - relay 1 || FF 00 - relay ON || CRC

|-
| FF / 05 / 00 02 / 00 00 / 79 D4 || FF || 05 - relay control || 00 02 - relay 2 || 00 00 - relay OFF || CRC
|-
| FF / 05 / 00 02 / FF 00 / 38 24 || FF || 05 - relay control || 00 02 - relay 2 || FF 00 - relay ON || CRC

|-
| FF / 05 / 00 03 / 00 00 / 28 14 || FF || 05 - relay control || 00 03 - relay 3 || 00 00 - relay OFF || CRC
|-
| FF / 05 / 00 03 / FF 00 / 69 E4 || FF || 05 - relay control || 00 03 - relay 3 || FF 00 - relay ON || CRC

|-
| FF / 0F / 00 00 / 00 08 / 01 FF / 30 1D || FF || 0F - turn ON all relays || 00 00 || 00 08 01 FF || CRC
|-
| FF / 0F / 00 00 / 00 08 / 01 00 / 70 5D || FF || 0F - turn OFF all relays || 00 00 || 00 08 01 00 || CRC

|}

{| class="wikitable sortable"
|-
! CMD !! Description !! Return !! Return Description
|-
| 00 01 00 00 00 01 02 00 (01) 6A 00 || set device address 01 || 00 01 00 00 00 01 02 00 (01) 6A 00 || return the same
|-
| 00 01 00 00 00 01 02 00 (FF) EB 80 || set device address FF || 00 01 00 00 00 01 02 00 (FF) EB 80 || return the same
|-
| 00 / 03 / 00 00 / 00 01 / 85 DB || read device address || 00 03 02 00 /FF C5 C4 || FF is the return device address
|-
| FF 10 (00 03) 00 02 04 00 04 (00 14) C5 9F || turn on then off after 2s, (relay address), (delay time 0x14 * 0.1 = 20 * 0.1) || ||
|-
| FF 10 (00 03) 00 02 04 00 02 (00 1E) A5 99 || turn of then on after 3s, (relay address), (delay time 0x1E * 0.1 = 30 * 0.1) || ||
|}

== Modbus function code - 2nd byte ==

Modbus Function Codes Recognized by CSI Gateways

Function Code Register Type
* 1 Read Coil
* 2 Read Discrete Input
* 3 Read Holding Registers
* 4 Read Input Registers
* 5 Write Single Coil
* 6 Write Single Holding Register
* 15 Write Multiple Coils
* 16 Write Multiple Holding Registers

== Reference ==
* https://blog.csdn.net/yangbingzhou/article/details/39504015

[[category: Interface]]

Category:ModBus - Revision history

Chao at 09:50, 9 September 2021