Modbus is a simple protocol for serial communication between electronic devices.
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Modscan Request format
I have downloaded the modbus RTu library from below link. The code seems working for me. I Need help in Modify sending request format with same library function.
Here is My part of code. I am also ...
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0answers
18 views
Modbus Protocol RTU
I have simple code working on Serial Communication asn below. With Same data i would impliment Modbus protocol> I have Used Modbus library for arduino earlier which works fine with 9600 baudrate and ...
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1answer
61 views
Why ModBus RTU Master-Slave Dont Work
I have two mega arduino and want to them communicate with modbus rtu together, i use below link circuit for this :
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3
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1answer
75 views
Arduino throwing error while using modbus RS485 code
I have been trying to make a communication with my industrial drive. All I want to do is read a few values of drive, like current, voltage etc.
For that I am using a library:
I don't understand why ...
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1answer
51 views
Modbus master arduino code is throwing weird errors on upload
I am using the following https://code.google.com/p/simple-modbus/ arduino master library code. In order to communicate with my industrial drive.
All seems right but I am getting some weird errors. I ...
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0answers
31 views
Modbus loopback test
I am using Simplemodbus library with arduino Uno board. I have used below code with 5 device with different slave ID. The Indivually these slaves are working fine. Now I am trying to connect it in ...
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0answers
33 views
ModbusSlave485 how to use
I have an Arduino Uno board, with these components:
rs-485 Modbus module shield
Multiprotocol radio shield board for Arduino
In addition I have a level sensor which reads either 1 when it is above ...
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0answers
100 views
Modbus RS485 Comms Export Meter
I am attempting to communicate with an ABB electrical export meter with an Arduino Mega2560. I am using the SimpleModbusMaster library as found here : ...
3
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3answers
945 views
How to interconnect multiple Arduinos with a Rpi to control home-lights/switches
While planning the lightning infrastructure (wall-switches and lights) of my new home (it's still under-construction) I choosed to go through the "automated route" way and due to my background (I'm an ...
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0answers
71 views
Anyone using ModBus RTU on Galileo gen 2?
I'm trying to communicate with some industrial hardware, on ModBusRTU, from my Intel Galileo Gen2 board. I use this board to convert UART to RS485 ...
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2answers
115 views
Communication arduino MODBUS fails on high number of registers
When I try to run the following program it runs ok:
#include <modbus.h>
#include <modbusDevice.h>
#include <modbusRegBank.h>
#include <modbusSlave.h>
#include ...
2
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0answers
124 views
ModbusMaster.h - changing node
I'm using the ModbusMaster.h library on a project, with arduino-uno and a TTL/RS-485 converter, and the function has to identify the slave that it is communicating. The slaves goes from 1 to 16. After ...
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1answer
261 views
modbus slave ID setting
I have small problem in setting device ID for Mosbus slave arduino. Here is simple example
In Modus library; device ID being configure hardcode while program. This code works for Me.
Modbus ...
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0answers
152 views
Modbus slave ID assign arduino
I have below code for Modbus.I wanted to add 0-255 device to modbus. The library given are configured as hardwired.
Below is simple slave code where device ID assigned.
#include <ModbusRtu.h>
...
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1answer
480 views
Modbus slave data into word
I have simple code. The library downloaded from github:smarmengol/Modbus-Master-Slave-for-Arduino.
I wanted to store floating point. In the code blow, I type casted to integer value. As I know ...
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votes
1answer
1k views
Modbus master slave
I need Help in two thing Here.
1)My main project is i have 23 hallsensors with analog output. There are connected to arduino UNO analog pins using 16:1 Mux or 8:1 mux circuit. The currently i can ...
1
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0answers
308 views
Negative value conversion for modbus slave
I have an analog sensor which reads values 0-5v, -75 degrees to 75 degrees. Now I have converted to +75 degrees and -75 degrees format depend on the voltage.
From 2.5v to 5v data is read properly ...
2
votes
1answer
846 views
Response of Modbus Protocol
I have the below code. This code is successfully compiling and uploading, but I am not getting any response from Slave. What do I need to do?
Some time data being received from Slave (I get this ...
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0answers
541 views
MODbus response for configure data
I am not able to receive data. I am able to send data from master but am not getting any response. This program uploaded successfully. I have below setup to monitor data from Modbus.
I have included ...
