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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Identify what protocol this Honeywell UDC330B is talking over and how do I talk to it?
Last message by
ControlsGuy25
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HMI Modbus TCP/IP Device Communication
Last message by
jschulze
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Modbus TCP comms between Eurotherm controllers and GE IC695ETM001 module (RX3I)
Last message by
David_2
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132
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jfenwick
Cheap Modbus TCP module similar to STRIDE Field I/O?
Last message by
patrickduis
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Communication issue Intouch - Schneider M580
Last message by
seatocl
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Modbus RTU to TCP/IP
Last message by
kris
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948
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Question about ModBus slave addresses
Last message by
Maik Staberock
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321
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patrickduis
Excellent explanation on how Modbus works
Last message by
patrickduis
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489
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wsell
How to actually get measurement data from Modbus Gateway
Last message by
jschulze
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169
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sn4p
Modbus connection to Trane Fan&Coil Unit
Last message by
David_2
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192
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How to set USB port as RS-485 entrance? How to interpret Growatt inverter commands?
Last message by
jschulze
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389
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First venture into MODBUS, how to send a password?
Last message by
mrwee
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Modbus reading events and alarms
Last message by
filip12241224
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modbus memory map got me confused - can you please help?
Last message by
hewking
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223
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Wago cp 104vga 762 3104 modbus slave
Last message by
gbcobena
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180
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plc modbus rtu timeout oscillascope
Last message by
David_2
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456
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Historia 02
Cambiar Ascii a RTU
Last message by
David_2
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338
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ModScan64 error message: "MODBUS message TIME-OUT"
Last message by
David_2
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393
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Help with pyModbusTCP
Last message by
David_2
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586
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rudro101
Register address issue
Last message by
rudro101
5
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404
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