Patent ID: 8448149
Filing Date: 2013-05-21
Classification: G05B

Abstract:
1. A method for computer implemented conversion of traditional ladder diagrams, read and executed column by column, for programmable logic controllers, in accordance with the 984 model, into ladder diagrams read and executed in a data-flow-oriented manner for IEC 61131-oriented controllers, said method characterized in that: in the traditional ladder diagrams, read and executed column by column, it is determined whether within the network certain original variables occur on both coils and contacts, it is determined, whether the contact according to the 984 model is processed before the associated coil and according to the IEC model is processed after the associated coil, in the affirmative case, for each such original variable, one additional variable is generated and this additional variable is recorded with the respective contact instead of the original variable, and wherein a contact with the original variable is connected to the power supply simulation at the end of the network, followed by a coil with the generated variable.