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: <br>
Address + function code + data + CRC check code<br>
<br>
2.the register type<br>
This meter uses two types of registers, individually addressed<br>
The first is the data register, read-only, using the command code 0x04 to read.<br>
The second category is the parameter register, readable and writable, using the command code 0x03<br>
read, write parameters using 0x10<br>
<br>
3.the data format<br>
Float type data: Read the internal data within the meter in line with IEEE-754 standardv
floating-point number, data format is 32-bit 4-byte single-precision floating-point data format.<br>
<br>
4、Data register list<br>

{| class="wikitable"
! colspan="2"| Data register address !! colspan="4"| Register Description
|-
| highByte  || lowByte || Description     || unit ||  Format        || Mode
|-
| 00        || 00      || A phase voltage || V    || Floating point || Read-only
|-
| 00        || 02      || B phase voltage || V    || Floating point || Read-only
|-
| 00        || 04      || C phase voltage || V    || Floating point || Read-only
|-
| 00        || 08      || A line current  || A    || Floating point || Read-only
|-
| 00        || 0A      || B line current  || A    || Floating point || Read-only
|-
| 00        || 0C      || C line current  || A    || Floating point || Read-only
|-
| 00        || 10      || Total active power || KWh || Floating point || Read-only
|-
| 00        || 12      || A phase active power || KWh || Floating point || Read-only
|-
| 00        || 14      || B phase active power || KWh || Floating point || Read-only
|-
| 00        || 16      || C phase active power || KWh || Floating point || Read-only
|-
| 00        || 18      || Total reactive power || KWh || Floating point || Read-only
|-
| 00        || 1A      || A phase reactive power || Var || Floating point || Read-only
|-
| 00        || 1C      || B phase areactive power || Var || Floating point || Read-only
|-
| 00        || 1E      || C phase reactive power || Var || Floating point || Read-only
|-
| 00        || 2A      || A phase power factor ||  || Floating point || Read-only
|-
| 00        || 2E      || B phase power factor ||  || Floating point || Read-only
|-
| 00        || 2C      || C phase power factor ||  || Floating point || Read-only
|-
| 00        || 36      || frequency || frequency  || Floating point || Read-only
|-
| 01        || 00      || Total active electricity power  || KWh  || Floating point || Read-only
|-
| 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
|-
| 0x03      || Function code, read parameter register
|-
| 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)