Modbus

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A community for the Modbus communications protocol - data communication between devices over TCP/IP and over serial line – open and royalty-free since 1979. Visit Modbus.org to download the Modbus protocol specification and implementation guides.
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Modbus Organization Replaces Master-Slave with Client-Server
Last message by
mercator
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Read Modbus Address and its customization
Last message by
jschulze
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nikoloz
Homebrewed software to communicate with measuring device via Modbus TCP
Last message by
nikoloz
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ELGI Neuron 3 rs 485 to allen bradley plc through ethenet tcp/ip
Last message by
milo2828
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MODBUS Server device with relays?
Last message by
jschulze
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275
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First venture into MODBUS, how to send a password?
Last message by
StarkJohan
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ABB PM573 ETH - after 1 valid poll and response the Modbus communication terminates.
Last message by
Devraghav
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Has anyone worked with Brodersen RTUs?
Last message by
Mehdi Sajjadi
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What is difference of INPUTS and OUTPUTS in Modbus
Last message by
Claudir Calazans
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VFD Modbus Integration
Last message by
mamiriqbal
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351
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Modbus Coil and register Question
Last message by
Mehdi Sajjadi
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22K
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How to protect Modbus TCPIP server from connecting more than Max number of connections, new connection causing dropping of old connections
Last message by
jschulze
1
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393
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zhenpingd45
Problem of oyostepper stepper motors connection
Last message by
zhenpingd45
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194
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Modbus RS-485 Checksum and insufficient bytes received errors
Last message by
jschulze
9
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503
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what are MODBUS FC 5,6,15,16 ?
Last message by
Mehdi Sajjadi
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513
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RS485 stopped working on windows 7 after many years
Last message by
aremerikhi
0
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254
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Anon23
Honeywell UDC2800 Modbus RTU + Python
Last message by
Anon23
9
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513
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Netbiter IOX-8AIV - Checksum Error in Repsonse Message - Modbus RS485 modscan
Last message by
jschulze
19
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442
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MarcoMontemurro
Communication lost with all devices In a modbus rtu network when one of the devices went off
Last message by
MarcoMontemurro
2
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367
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sairam
RS485 Communication on Orange Pi to Read Gas Analyzer Data
Last message by
jschulze
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1K
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Meanwell DRS-240 comms with ControlByWeb X404
Last message by
myootnt
4
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501
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