LADDER PROGRAM RETRIEVAL DEVICE CAPABLE OF RETRIEVING LADDER CIRCUITS BASED ON SPECIFIED SIGNAL OPERATION CONDITIONS

摘要

Provided is a ladder program retrieval device that includes: search condition specification unit for specifying, as search conditions, a plurality of signals and a logical operation relationship between any two signals included in the plurality of signals; search signal presence determination unit for determining, for each of the plurality of ladder circuits included in the ladder program, whether the ladder circuit includes all of the plurality of signals specified in the search conditions; and search logic presence determination unit for determining, for each of the ladder circuits determined by the search signal presence determination unit to include all of the signals specified in the search conditions, whether or not the ladder circuit includes the logical operation relationship.

主权项

1. A ladder program retrieval device which retrieves a plurality of ladder circuits included in a ladder program on the basis of specified search conditions, the device comprising:
search condition specification unit for specifying, as search conditions, at least two plurality of signals, and at least one logical operation relationship between any two signals included in the plurality of signals; search signal presence determination unit for determining, for each of the plurality of ladder circuits included in the ladder program, whether the ladder circuit includes all of the plurality of signals specified in the search conditions; search logic presence determination unit for determining, for each of the ladder circuits determined by the search signal presence determination unit to include all of the signals specified in the search conditions, whether or not the ladder circuit includes the logical operation relationship; and display unit for displaying the ladder circuits determined to have matched the search conditions by the search signal presence determination unit and the search logic presence determination unit, wherein the search logic presence determination unit is provided with determination unit for determining a connection relationship in the ladder circuit between the signals included in the logical operation relationship, and determines whether or not the ladder circuit includes the logical operation relationship on the basis of the determination result of the determination unit.