Difference between revisions of "Modbus TCP"
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Note that this is not the same as as Modbus over TCP/IP. | Note that this is not the same as as Modbus over TCP/IP. | ||
For background information on Modbus and its different variants please see the [http://en.wikipedia.org/wiki/Modbus Modbus article in Wikipedia]. | For background information on Modbus and its different variants please see the [http://en.wikipedia.org/wiki/Modbus Modbus article in Wikipedia]. | ||
| + | Modbus is often used by PLC's. | ||
==AlphaCom and the Modbus TCP protocol== | ==AlphaCom and the Modbus TCP protocol== | ||
AlphaCom can send out status information in the Modbus TCP protocol via an EDO-port. | AlphaCom can send out status information in the Modbus TCP protocol via an EDO-port. | ||
| + | * Select an available EDIO port, for instance EDIO 1 | ||
| + | * TCP/IP client | ||
| + | * Enter the IP address of the PLC to connect to | ||
| + | * Enter the Port nr. which is used by the Modbus TCP protocol, by default 502 | ||
| + | |||
| + | ==Modbus TCP protocol== | ||
| + | Modbus TCP is a binary protocol | ||
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| + | |||
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| + | [[Category:3rd party integration]] | ||
Revision as of 12:17, 24 January 2012
Introduction
Modbus TCP is a Modbus variant used for communications over TCP/IP networks, connecting over port 502. It does not require a checksum calculation as lower layers already provide checksum protection. Note that this is not the same as as Modbus over TCP/IP. For background information on Modbus and its different variants please see the Modbus article in Wikipedia. Modbus is often used by PLC's.
AlphaCom and the Modbus TCP protocol
AlphaCom can send out status information in the Modbus TCP protocol via an EDO-port.
- Select an available EDIO port, for instance EDIO 1
- TCP/IP client
- Enter the IP address of the PLC to connect to
- Enter the Port nr. which is used by the Modbus TCP protocol, by default 502
Modbus TCP protocol
Modbus TCP is a binary protocol