Questions tagged [modbus-rtu-over-tcp]
11 questions
1
vote
2 answers
Energy Monitor using Minimalmodbus and PZEM 016 device
I am trying to clear the energy counter for a Peacefair AC PZEM 016 energy monitor. I have a nice little script going that measures the values of the registers, however, I can not clear the energy through the minimalmodbus library and keep getting…
J Ferg
- 11
- 1
0
votes
0 answers
PIC18F24J10 activating second UART pins with Remapping in CCS
I have a problem that remapping second uart pin from PIC18F24J10 in CCS. I write this code for configurate after that configuration occures this error how do I have to do for fixing it. I am new at PIC programing.
I applied as in many MPLAB examples…
0
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0 answers
Python Modbus RTU over TCP connect fail
I am trying to read and write data on RTU over Modbus TCP with python.
But it prints false, this means client.connect() has failed.
from pymodbus.client import ModbusTcpClient
from pymodbus.transaction import ModbusRtuFramer as…
劉姿汶
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- 1
0
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0 answers
Unable to read correct register from pymodbusrtu server using controller (in my case TEMCO)
I have created a modbusrtu server using pymodbus library on Pi4.I am writing values on the context using the function
def write_data(context,address, value, slave_id_reader,reg_type):
context = context
print(" Adddress =",address,",…
Umer Farooq
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- 2
0
votes
2 answers
Python Modbus RTU over TCP
I am trying to read and write data over Modbus TCP with python.
When I am using ModbusPoll with the following setup everything works.
I try to read the data now with python and I am using the pymodbus library for this.
My code looks like this:
from…
maja95
- 63
- 1
- 8
0
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0 answers
I need to understand the physical Modbus network design
I am new to Modbus and I want to understand how the physical network can be set up.
Currently I register Modbus TCP devices as slaves one by one in this C1 device.
This works on ethernet, but I am not sure if I can communicate/discover RTU devices…
Prasad Patil
- 11
- 3
0
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0 answers
How to control(on/off) the relay in Modbus RTU on the RS-485 model using python
I am the begginer for python and rs-485. Currently I'm working on Modbus RTU protocol in RS-485, and I read and write data from read_holding_resister using python. Also, I need to control rs-485 relay using a python script. Thank you
Sample…
Murugesan
- 43
- 7
0
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0 answers
No Output priniting after read_input_registers
I cannot print anything on pi terminal
Please help
from pymodbus.client.sync import ModbusSerialClient
import serial.rs485
import time
import logging
import pprint
pp= pprint.PrettyPrinter(indent=4)
FORMAT = ('%(asctime)-15s %(threadName)-15s'
'…
Kaiffee Bains
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- 1
0
votes
1 answer
How to correctly convert the values received through modbus?
I am getting data in my console program on C# with library Nmodbus4 from a device via modbus rtu. Format: 32 bit floating point.I am request the device by registers 0x0D – 0x0F. My response is 5132, 3595, 8458 .And this answer should match 2020 12…
Catsbreak
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- 6
0
votes
1 answer
Program a modbus touch panel to open a relay in a modbus relay board
I have modbus touch panel with 4 buttons which is connected to a modbus relay board via rs485(A and B).
I want to program the touch panel so when i click a button to open a specific relay in relay board.
As i see from the touch panel manual and his…
Markos
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- 6
0
votes
0 answers
Is it possible to implement a Modbus Master based on libmodbuspp which uses RTU over TCP to talk to RTU slaves behind a TCP/RTU gateway?
I'm developing a C++ Modbus application which already uses the libmodbuspp library to implement a Modbus Master device to query Modbus Slaves either in TCP or RTU modes (respectively for devices connected over an Ethernet network or RS-232/485…
Claudio
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