![]() In this example 2 Modbus functions are presented. The "MB_SERVER" instruction processes connection requests of a Modbus TCP client, receives requests from Modbus functions and sends response messages. ![]() The "MB_SERVER" instruction communicates as Modbus TCP server over the PROFINET connection of the S7-1200 You do not need any additional hardware to use the instruction. You use the "MB_CLIENT" instruction to establish a connection between the client and the server, send requests and receive responses, and control the connection disconnection of the Modbus TCP server. The "MB_CLIENT" instruction communicates as Modbus TCP client over the PROFINET connection of the S7-1200 You do not need any additional hardware to use the instruction. The instructions "MB_CLIENT" and "MB_SERVER" are called and parameterized in the user program of the S7-1200 CPU. Introduction Modbus TCP communication between two S7-1200 CPUs is presented. 17 How to Use the User Program in the Modbus TCP- Server. 17 How to Use the User Program in the Modbus TCP Client. 13 Input and Output Parameters of the "MB_SERVER" Instruction. 7 Input and Output Parameters of the "MB_CLIENT" Instruction. MDOBUS-TCP using the instructions MB_CLIENT and MB_SERVER Beitrags-ID: 83130159, V1.1, 01/2015 Further information can be found under the Content-ID 50203404. Please take into account furthermore that corresponding protective measures have to be taken up in the context of Industrial Security when connecting your equipment to other parts of the plant, the enterprise network or the Internet. The general terms of use () apply.Ĭaution The functions and solutions described in this article confine themselves to the realization of the automation task predominantly. This entry is from the Siemens Industry Online Support.
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