The invention provides a PLC
software programming aided design method. The PLC
software programming aided design method comprises a step 1 of receiving a table stored with specific parameters of a PLC
software function module, the specific parameters being used for automatically and regularly generating correlated variables and finally generating PLC codes; a step 2 of enabling PLC
programming auxiliary
design software to automatically generate a variable identification external input-output
signal list of external input-output signals; a step 3 of enabling the PLC programming auxiliary
design software to generate internal intermediate variables and PLC program codes; a step 4 of introducing generated
internal variable information and calling codes into PLC programming software. The PLC
software programming aided design method is advantaged in that the PLC
programming process is greatly simplified, errors, of codes and parameters, caused by manual input are avoided, variable names,
annotation, storage regions and the like which are automatically generated all accord with the standardizing programming requirement, the fact that the generated PLC codes are from an unified module
library can be ensured, and the fact that the PLC program architecture is standardized is ensured.