pymodbus3

Modbus Error: [Input/Output] No Response received from the remote unit

由 若如初见. 提交于 2019-12-19 04:07:48
问题 I' trying to connect from my Mac laptop to a Modbus device (MR-SI4) using a serial connection using a USB RS485 converter that gets "mounted" to /dev/cu.SLAB_USBtoUART . This is my code: import logging logging.basicConfig() log = logging.getLogger() log.setLevel(logging.DEBUG) from pymodbus.constants import Endian from pymodbus.constants import Defaults from pymodbus.payload import BinaryPayloadDecoder from pymodbus.client.sync import ModbusSerialClient as ModbusClient from pymodbus

Modbus Error: [Invalid Message] Incomplete message received, expected at least 2 bytes (0 received)

由 青春壹個敷衍的年華 提交于 2019-12-18 06:23:53
问题 Problem pymodbus master/client can send a request to the slave/server. The slave/server make the things to return ready and is waiting for the master/client to pick them up. Despite the readiness of the server/slave, the master/client just returns the error "Modbus Error: [Input/Output] Modbus Error: [Invalid Message] Incomplete message received, expected at least 2 bytes (0 received)". Setup I use the laptop as server/slave with this adapter: https://www.amazon.com/dp/B076WVFXN8/ref=twister

Pymodbus read holding registers

由 老子叫甜甜 提交于 2019-12-11 10:37:08
问题 I was assigned to perform the task without any documentation. I have a problem with reading data from MODBUS. This is the script that I was able to create: from pymodbus.constants import Endian from pymodbus.payload import BinaryPayloadDecoder from pymodbus.payload import BinaryPayloadBuilder from pymodbus.client.sync import ModbusTcpClient client = ModbusTcpClient('X.X.X.X') connection = client.connect() request = client.read_holding_registers(12606,2) result = request.registers decoder =

Modbus Error: [Invalid Message] Incomplete message received, expected at least 2 bytes (0 received)

由 北战南征 提交于 2019-12-01 06:02:08
Problem pymodbus master/client can send a request to the slave/server. The slave/server make the things to return ready and is waiting for the master/client to pick them up. Despite the readiness of the server/slave, the master/client just returns the error "Modbus Error: [Input/Output] Modbus Error: [Invalid Message] Incomplete message received, expected at least 2 bytes (0 received)". Setup I use the laptop as server/slave with this adapter: https://www.amazon.com/dp/B076WVFXN8/ref=twister_B076X1BS4H?_encoding=UTF8&psc=1 I have an Raspberry Pi 3 / BananaPi as master/client with this adapter

Modbus Error: [Input/Output] No Response received from the remote unit

由 蹲街弑〆低调 提交于 2019-11-29 08:13:56
I' trying to connect from my Mac laptop to a Modbus device ( MR-SI4 ) using a serial connection using a USB RS485 converter that gets "mounted" to /dev/cu.SLAB_USBtoUART . This is my code: import logging logging.basicConfig() log = logging.getLogger() log.setLevel(logging.DEBUG) from pymodbus.constants import Endian from pymodbus.constants import Defaults from pymodbus.payload import BinaryPayloadDecoder from pymodbus.client.sync import ModbusSerialClient as ModbusClient from pymodbus.transaction import ModbusRtuFramer # settings for USB-RS485 adapter SERIAL = '/dev/cu.SLAB_USBtoUART' BAUD =
订阅 pymodbus3