1. Fbb-x310 Profibus
2. Parameterization and commissioning
3. Configuration
4. Configuration Data (Cfg Data)

Configuration Data (Cfg Data)

Cfg Data

The PROFIBUS coupler creates a data area with input and output bytes (Peripheral data in the process image). The assignment of the channels in the Bus Terminals/Modules and the process image is carried out by the Bus Coupler/Fieldbus Box.

The PROFIBUS master exchanges a continuous input and output data block with each Bus Coupler/Fieldbus Box. The assignments of the bytes from this data block to the addresses in the process image is carried out by the master. In the PLC master of the IM308-C the COM PROFIBUS software supports the configuration, and in the IM308-B the COMET200 software does this job. For other PROFIBUS Masters, the appropriate tools from the manufacturer are to be used.

After being switched on, the Bus Coupler or Fieldbus Box determine the configuration of the connected input/output terminals. The assignment of the physical slots for the input/output channels and the addresses in the process image is carried out automatically by the Bus Coupler. A distinction is made here between bit-oriented (digital) and byte-oriented (analog or complex) signal processing. The Bus Coupler first writes the byte oriented Bus Terminals into the process image, followed by the bit oriented terminals.

When configuring the master, it must be borne in mind that all the byte oriented Bus Terminals and Fieldbus Boxes must first be entered in the sequence in which they are physically inserted. No distinction is made here between input terminals and output terminals. The bit-oriented bus terminals come next. These are rounded up to a full byte, so that 12 digital signals, corresponding to 12 bits, are rounded up to two bytes. The remaining four bits are automatically filled with zeros. The GSD file contains 8/16/32, up to 1 word, digital inputs and/or outputs for the bit-oriented terminals.

For the byte oriented Bus Terminals/Modules, only the initial identification plus the "placeholder" is given (e.g. KL3xxx or IP3xxx-B310) rather than the terminal name itself. All of these terminals are equal in the size in the process image. After this, the number of channels can be specified. This is useful if it is desired to assign different addresses in the PLC to the terminal channels.