Interbus process image

Data transferred via the fieldbus are accessible via the PLC variables for the BCxxxx. In the default setting, 16 bytes of output data are transferred to the Bus Terminal controller, and 16 bytes of input data are read. The local PLC, i.e. the BCxxxx, recognizes the master output data as inputs in the memory area %IB128...143 and writes its output data %QB128...143 to input data in the master control. The offset and the length of the PLC variables can be changed in Table 1.