The PLC control system is too bad in the production environment,under the electronmagetic interference specially intense environment,possibly creates the program error or the operation mistake. Thus produces inputs by mistake and causes outputs by mistake,this will be able to create the equipment out of control and the misoperation and so on the common dangerous phenomenon and the consequence,and promptly proposed the effective preventing and controlling measure,controlled the worker for the multitudinous labor actually to construct put forward some rational proposals.
This paper introduces two essential problems-ability of antijamming and photoelectric linear isolation in the application system of 8098 Single-ChiP Computer Particularly, the method of program tracing fot correcting program error is analyzed.
Serial communication is widely used in control project,serial debugger is one′s right hand of serial application software,several series debugger software have appeared in the Internet,but there is insufficiency power,the paper introduces a professional serial communication debugger,which may simulate any serial device,numerate all serial status,and inspect any program error or exception of control system serial application.
At the same time,in view of the problem of the program error occurrence with the changed path of database file,it expounds in detail the dynamic path method for establishing the connection between Visual Basic application program and Access database,resolves the static problem in the connection,and it can find out correctly the database files under the condition of the database path changed,then,it guaranteed the validity of the program.
This is to avoid a program error caused by missing data.
Maintenance procedures focus on hardware component replacement as well as software backups and program error diagnostics.
In addition, parameters that work perfectly with one program error may not generalize to other errors or programs.
However, because of compatibility issues with different versions of the same library files, the wrong library version can cause a program error.
This paper has analysed many different kinds of backgrounds of program errors, and discussed thirteen methods for program errors class ification. Finally we provide a new method on program sorting in the light of types of program errors.
In this Paper, the base stucture, main function and work Principle of automatic diagnostic system for NC program errors are introduced. Key techniques applying to the system are discussed. A new method,the char-set matching method,is put forward which can be used to judge grammar or morphology errors in program.
During the MPP Fortran parallel programing, program errors and poor perfermance may occur if versions of external procedures are improperly called, or if mismatch exists between the shared or private attributes of dummy arguments and that of actual arguments. This paper presents an effective method of multi-version technique for external procedure calls.