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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Checksum error and Insufficient bytes recieved
Last message by
jschulze
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31
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CS31 to Rs485
Last message by
Alaateba
0
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18
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nikoloz
Homebrewed software to communicate with measuring device via Modbus TCP
Last message by
nikoloz
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3K
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Modbus Function Code 5
Last message by
lsmadeux
2
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213
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Trying to integrate A/C system with home assistant
Last message by
daveymit
2
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187
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R
How to: slave addressing
Last message by
jschulze
9
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261
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Mylara-Effone
Invalid range error while modbus writing register value.
Last message by
jschulze
3
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200
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M
Modbus communication between a Delta PLC and a C# program
Last message by
mike82
0
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220
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Modbus TCP/IP to SFTP Convertor
Last message by
patrickduis
2
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463
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Conversion from IEC 60870-5-103 To Modbus
Last message by
David_2
2
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991
Views
IoTPlay
Testing 8CH relay modbus using modpoll on Raspberry Pi - cannot get past "Reply time-out!"
Last message by
IoTPlay
2
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619
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Wyara
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Last message by
Wyara
2 3
48
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1K
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Question: Holding Register can do everything?
Last message by
David_2
3
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331
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MAX485 module RO pin nearing 0V
Last message by
jschulze
1
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453
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Advaith
Establishing Modbus TCP communication
Last message by
patrickduis
2
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714
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V
Read modbus problem with modscan
Last message by
Vince Fong
2
Replies
502
Views
paulchernoch
Do MODBUS TCP responses have a TCP header like the requests?
Last message by
jschulze
5
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464
Views
D
Momentum 170ENT11001
Last message by
agr
3
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947
Views
E
Simple question about Read Holding Registers
Last message by
jschulze
5
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951
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S
Temperature Control with Labview and Modbus ASCII
Last message by
mahdiabid
8
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3K
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