Introduction to Industrial Automation

Figure 7.57  Programming operation of forward-reverse motors using FC.

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Basic Programming Principles of PLCs 

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can be programmed with a simple FC. Finally, the station S cooperates with the rest of the equip-

ment, but has its own separate automation logic that can be programmed into the main program. At 

this point, the automation logic of each production unit will not be considered in detail, except for 

the presentation of the overall organization of the structural programming and the definition of the 

calling hierarchy of the various program blocks. Figure 7.59 shows the structural form of the overall 

automation program of the industrial process. The components of the program are FB1 for the con-

veyor belts, which receive data from four different data blocks; and FC1 for processing machines and 

the main program, including the central station automation.