PROFIBUS bus instrumentation and PLC communication settings

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Profibus DP Bus Meter - PLC - Host Computer. How to Set Up an Automatic Control System?

Answer: To set up a control system using a Profibus DP bus meter connected to a PLC and a host computer, you need the following hardware configuration:

First, the PLC must have a Profibus DP interface. In the STEP7 software, it's essential to install the GSD file of the bus device and configure it correctly. This ensures that the PLC can communicate with the DP slave devices.

For third-party DP slaves, the general setup process involves the following steps:

Use the HW Config tool in STEP7 to add the device by installing its GSD file.
Configure the device within the S7-300 master system.
Program the PLC to read and write data from the corresponding I/O addresses.
If the data is not binary, refer to the slave deviceâ€™s manual for specific instructions on how to interpret and handle the data.

It's also recommended to consult Siemens experts or technical support for more detailed guidance, especially when dealing with non-standard or custom devices. Proper configuration and testing are crucial to ensure smooth communication and reliable operation of the entire system.

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