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Modbus TCP Ports

4/1/2015 12:38 AM	Rate (0)
DONDO Regular Member Joined: 8/26/2010 Last visit: 4/30/2025 Posts: 6 Rating: (0)	We can use a single port on a Modbus TCP for writing and reading in a remote scada?

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4/1/2015 3:44 PM	Rate (0)
Kaulquappe Posts: 3093 Rating: (324)	Hello Dondo, yes, one port is sufficent. ModbusTCP uses port 502 at the server side. Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (324)
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4/8/2015 11:29 AM	Rate (0)
tylim1988 Experienced Member Joined: 9/22/2014 Last visit: 8/17/2015 Posts: 96 Rating: (0)	Kaulquappe Hello Dondo, yes, one port is sufficent. ModbusTCP uses port 502 at the server side. Regards, Kaulquappe hi, is it possible for us to use port 503? for example i need 2 connection so the first connection use port 502 can the second connection use port 503?

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4/8/2015 11:42 AM	Rate (1)
Kaulquappe Posts: 3093 Rating: (324)	Hello, the Simatic Modbus FBs support port 503. Does the 3rd party device support this port too? Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (324)
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This contribution was helpful to 2 thankful Users tylim1988 Reyaduoh

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