A program analyzing unit that extracts electrode numbers included in a plurality of processing programs, determines duplication of the electrode numbers among the processing programs to display a result of determination, and that stores correspondence between a revision electrode number that is specified by a user and an in-use electrode number that is used in the processing program for each of the processing programs and a program executing unit that executes each of the processing programs by reading the revision electrode number instead of the in-use electrode number used in each of the processing programs based on the stored correspondence at the time of execution of the processing programs are included, and duplication of the electrode numbers used among the programs is easily and certainly resolved.