Editing Modbus protokoll rs485 (section)

=== Modbus Rtu 2 ===

Hardware Resources:
Data register address
  *   RS485 communication interface
  *   TTL communication interface
  *   2 Input ( max. DC +12 Volt UB ) 
  *   2 Relay Output 
  *   A user button
  *   A user LED
  *   A power indicator
  *   A STM32F030F4 microcontroller
  *   2 relay status indicators LED lights
  *   Power supply terminal interface (12V power supply)


Meaning of each byte:<br>
<br>
Byte 1:        address <br>
byte 2:        function <br>
byte 3 4:      register address <br>
byte 5 6:      register data <br>
byte 7 8:      CRC check <br>
<br>



[address 1 bzw. UID 0x01]<br>

Switch Single 

{| class="wikitable"
! colspan="8"| Hex Data !! colspan="1"| Funktion 
|-
| Adresse  || Funktion  || Reghigh || Reglow || Data 1 || Data 2 || CRChigh || CRClow || Funktion  
|-
| 01       || 05        ||   00   ||    00   ||    FF   ||   00     ||    8C  ||  3A  ||  0 relay ON
|-
| 01       || 05        ||   00   ||    00   ||    00   ||   00     ||    CD  ||  CA  ||  0 relay off   
|-
| 01       || 05        ||   00   ||    01   ||    FF   ||   00     ||    DD  ||  FA  ||  1 relay ON 
|-
| 01       || 05        ||   00   ||    01   ||    00   ||   00     ||    9C  ||  0A  ||  1 relay off
|-
|}


all Funktion 

{| class="wikitable"
! colspan="8"| Hex Data !! colspan="1"| Funktion 
|-
| Adresse  || Funktion  || Reghigh || Reglow || Data 1 || Data 2 || Data 3 || Data 4 || CRChigh || CRClow || Funktion  
|-
| 01       || 0F        ||   00   ||    00   ||    00  ||   08   ||    01  ||   00   ||  FE     || 95     || Full Relay off
|-
| 01       || 0F        ||   00   ||    00   ||    00  ||   08   ||    01  ||   FF   ||  BE     || D5     || Full Relay on
|-
|          ||           ||        ||         ||        ||        ||        ||        ||         ||        || 
|-
|  01      || 02        ||  00    ||   00    ||  00    ||  08    ||        ||        ||  79     || CC     || Send : Read all input switch status 
|-
|  01      || 02        ||  01    ||   00    ||        ||        ||        ||        ||  A1     || 88     || Return : 8 input states 
|-
|}

Quelle - https://hacktronics.co.in/2-channel-relay-module/modbus-rtu-2-way-relay-output-2-way-input-switch-ttl-rs485-interface-communication



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