Editing Modbus protokoll rs485

=== Modbus Funktions Codes ===

{| class="wikitable"
! colspan="5"| Hex Data !! colspan="1"| Funktion 
|-
| adr || fc  || ! colspan="3"| data .....  || 
|-
| ..  || 01  || ..  ||  ..  ||..  ||  Lese Ausgangsbit Status
|-
| ..  || 02  || ..  ||  ..  ||..  || Lese Eingangsbit Status 
|-
| ..  || 03  || ..  ||  ..  ||..  || Lese Holding-Register Analog Ausgang 
|-
| ..  || 04  || ..  ||  ..  ||..  || Lese Input-Register Analog Eingang 
|-
| ..  || 05  || ..  ||  ..  ||..  || Schreibe Ausgangsbit 
|-
| ..  || 06  || ..  ||  ..  ||..  || Schreibe Holding-Register Analog Ausgang 
|-
| ..  || 0F  || ..  ||  ..  ||..  || * Funktion noch offen   
|-
| ..  || 10  || ..  ||  ..  ||..  || wird bei den China Modulen zum Anpassen der UID benutzt 
|-
| ..  || 15  || ..  ||  ..  ||..  || Schreibe mehrfach Ausgangsbit  
|-
| ..  || 16  || ..  ||  ..  ||..  || Schreibe mehrfach Holding-Register (Daten für >16-bit) Analog Ausgang 
|-
| ..  || 23  || ..  ||  ..  ||..  || *  Funktion noch offen 
|-
|}

* das sind wohl noch nicht alle Modbus Funktion Codes
es gibt wohl auch Sonderfunktionen die nur bei bstimmten Geräten vorhanden sind hier z.B. 0x10h setzten der UID 


<br>
adr  -> device Adress oder auch UID - 1 Byte lang <br>
fc   -> Function Code 1 Byte <br>
data -> n Bytes<br>

Modbus RTU Instructions:

Baud rate: 9600 8 NONE 1

Hexadecimal send<br>
hexadecimal receive<br>
<br>
Operation steps:<br>
1. Software settings communication baud rate<br>
2. Set the address (communication using the device address, the default address is 01)<br>
<br>
Set the address from from Broadcast to 0x01 , 0x02 , 0x03

{| class="wikitable"
|-
! Hex Byte  !! Funktion  
|-
| 00 10 00 00 00 01 02 00 01 6A 00  || Broadcast Address Modified to 01
|-
| 00 10 00 00 00 01 02 00 02 2A 01  || Broadcast Address Modified to 02
|-
| 00 10 00 00 00 01 02 00 03 EB C1   || Broadcast Address Modified to 03
|}
<br>

Read Address at Broadcast Call <br>

{| class="wikitable"
|-
! Hex Byte  !! Funktion  
|-
| 00 03 00 00 00 01 85 db  || Send to Device ( Broadcast ) 
|-
| 00 03 02 00 01 44 44     || Receive from Device  '''01 for Address'''
|-
| 00 03 02 00 02 04 45     || Receive from Device  '''02 for Address'''
|-
| 00 03 02 00 03 C5 85     || Receive from Device  '''03 for Address'''
|-
|}
<br>

=== 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



<br>

=== Modbus Rtu 4 ===

Specifications:

  *   RS485 communication interface
  *   TTL communication interface
  *   4 Input ( Switch to GND !!!! NO + UB !!! )
  *   4 Relay Output 
  *   2 user button
  *   A user LED
  *   A power indicator
  *   A STM32F030F4 microcontroller
  *   4 relay status indicators LED lights
  *   Power supply terminal interface (12V power supply)



[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
|-
| 01       || 05        ||   00   ||    02   ||    FF   ||   00     ||    xx ||  xx  ||  2 relay ON 
|-
| 01       || 05        ||   00   ||    02   ||    00   ||   00     ||    xx  ||  xx  ||  2 relay off
|-
| 01       || 05        ||   00   ||    03   ||    FF   ||   00     ||    xx  ||  xx  ||  3 relay ON 
|-
| 01       || 05        ||   00   ||    03   ||    00   ||   00     ||    xx  ||  xx ||  3 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 
|-
|}

<br>

[https://hacktronics.co.in/4-channel-relay-module/4-channel-relay-module-programmable-w-opto-isolated-rs485-stm8s103f3 hacktronics.co.in/4-channel-relay-module]
<br>
[https://github.com/TG9541/stm8ef/wiki/Board-C0135 github Board-C0135]

[https://wiki.chaosdorf.de/images/1/14/Modbus_RTU_4_Way_Relay_Module.pdf Modbus_RTU_4_Way_Relay_Module.pdf]

===  DDS578R Energy Meter ===

MODBUS-RTU communication protocol Description:

1.the data format:
Address + function code + data + CRC check code

2.the register type
This meter uses two types of registers, individually addressed
The first is the data register, read-only, using the command code 0x04 to read.
The second category is the parameter register, readable and writable, using the command code 0x03
read, write parameters using 0x10

3.the data format
Float type data: Read the internal data within the meter in line with IEEE-754 standard
floating-point number, data format is 32-bit 4-byte single-precision floating-point data format.
4、Data register list

{| class="wikitable"
! colspan="4"| Data register address !! colspan="6"| Register Description
|-
| adr || fc  || highByte || lowByte || Description     || unit ||  Format        || Mode
|-
| xx  || 03  || 00        ||    00   || A phase voltage || V    || Floating point || Read-only
|-
| xx  || 03  || 00        || 02      || B phase voltage || V    || Floating point || Read-only
|-
| xx  || 03  || 00        || 04      || C phase voltage || V    || Floating point || Read-only
|-
| xx  || 03  || 00        || 08      || A line current  || A    || Floating point || Read-only
|-
| xx  || 03  || 00        || 0A      || B line current  || A    || Floating point || Read-only
|-
| xx  || 03  || 00        || 0C      || C line current  || A    || Floating point || Read-only
|-
| xx  || 03  || 00        || 10      || Total active power || KWh || Floating point || Read-only
|-
| xx  || 03  || 00        || 12      || A phase active power || KWh || Floating point || Read-only
|-
| xx  || 03  || 00        || 14      || B phase active power || KWh || Floating point || Read-only
|-
| xx  || 03  || 00        || 16      || C phase active power || KWh || Floating point || Read-only
|-
| xx  || 03  || 00        || 18      || Total reactive power || KWh || Floating point || Read-only
|-
| xx  || 03  || 00        || 1A      || A phase reactive power || Var || Floating point || Read-only
|-
| xx  || 03  || 00        || 1C      || B phase areactive power || Var || Floating point || Read-only
|-
| xx  || 03  || 00        || 1E      || C phase reactive power || Var || Floating point || Read-only
|-
| xx  || 03  || 00        || 2A      || A phase power factor ||  || Floating point || Read-only
|-
| xx  || 03  || 00        || 2E      || B phase power factor ||  || Floating point || Read-only
|-
| xx  || 03  || 00        || 2C      || C phase power factor ||  || Floating point || Read-only
|-
| xx  || 03  || 00        || 36      || frequency || frequency  || Floating point || Read-only
|-
| xx  || 03  || 01        || 00      || Total active electricity power  || KWh  || Floating point || Read-only
|-
| xx  || 03  || 04        || 00      || Total reactive electricity power|| KWh || Floating point || Read-only
|-
|}


The second category register (parameter register) read and operate read the meter Address:<br>

(HEX):01 03 00 08 00 02 45 C9<br>

Date descriptions 

{| class="wikitable"
|-
! Data      !! Detailed description
|-
| 0x01      || Instrument address ( adr )
|-
| 0x03      || Function code, read parameter register ( fc )
|-
| 0x00 0x08 || reading the data from the 00 08 meter internal register address
|-
| 0x00 0x02 || Read data length for two words( four bytes )of data
|-
| 0x45 0xC9 || CRC checksum data for the front, where the high front and low in the post
|-
|}

Returns Data (HEX) 01 04 03 40 00 00 00 EF F3

{| class="wikitable"
|-
! Data      !! Detailed description
|-
| 0x01      || Instrument address
|-
| 0x03      || Function code, read parameter register
|-
| 0x04      || Returned data length is 4 bytes of data length
|-
| 0x40 0x00 0x00 0x00 || TUSB To RS485 Converterhe data returned as a 4-byte data type float
|-
| 0xEF 0xF3 || CRC checksum data for the front, where the high front and low in the post
|-
|}
<br>
<br>
<br>

===  USB To RS485 Converter ===
<br>
[https://www.ebay.de/itm/USB-To-RS485-Converter-Industrial-Upgrade-Protection-RS-485-USB-2-0-Converter/401720933781 USB-To-RS485-Converter]  
<br>
<br>
''ll /sys/class/tty/*/device/driver''<br>
lrwxrwxrwx 1 root root 0 Dez 21 19:30 /sys/class/tty/ttyUSB0/device/driver -> ../../../../../../../../bus/usb-serial/drivers/pl2303/<br>
<br>
''lsusb''<br>
Bus 003 Device 014: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port<br>
<br>
<br>

https://developer.toradex.com/knowledge-base/uart-(linux)