Data channels

The INTERBUS extension has three channels available to the user. The use of all three channels is demonstrated in the IEC INTERBUS sample project.

Process data channel (PDO)

Data channel for cyclic process data. Receiving PDIN data and sending PDOUT data by calling an IEC function block of type IbsC3PdoHandler.

The process data length is set via the parameter pd length and is a maximum of 62 bytes (see parameters for the INTERBUS connection).

Parameterisation channel (PCP)

INTERBUS parameterisation channel. To use the PCP channel, an object directory must be created in the IEC program. This object directory can be accessed via PCP using a function block of type KebChannelHandler in conjunction with a function block of type IbsC3PcpHandler.

Configuration channel (CFG)

INTERBUS configuration channel for reading and writing the object directory of the INTERBUS firmware. This displays the status and configuration of the SUPI4 protocol chip.

Similar to the use of the parameterisation channel (PCP), the object directory is accessed via a function block of the type KebChannelHandler in conjunction with a function block of the type IbsC3CfgHandler.

Alternatively, the parameters can also be read and written with COMBIVIS via an IEC-DIN66019 slave of type Din_Slave_Udp. This must also be registered with the function block of type KebChannelHandler.