CJ2 CPU Unit Software User's Manual - CIP ETI

10 CPU Unit Functions10-5-4 Replacing the Entire Program during OperationOverviewThe entire task program can be replaced during operation in RUN or MONITOR mode by turning ONthe Replacement Start Bit (A650.15). The program/network symbol file (.OBJ) with a file name specifiedin advance in the Auxiliary Area will be read from the Memory Card and it will replace the program atthe end of the current cycle.10-5 Memory ManagementFunctions10CPU UnitUser programReplacement Start Bit (A650.15)turned from OFF to ON.ReplacementProgram File NameEntire user programSpecifiesprogramReplacementMemory Card10-5-4 Replacing the Entire Program during OperationExecutionconditionNormal processingA650.15Normal processingReplacementStart BitEND(In the last task)The CPU Unitwill execute theinstructionsremaining in thecycle even aftertheReplacementStart Bit isturned ON.The entire programis replaced.The program can also be replaced when program execution is stopped (PROGRAM mode) by turningON the Replacement Start Bit from the CX-Programmer.• The replacement program file cannot be read from EM file memory.• The Replacement Start Bit (A650.15) can be turned ON at any location (program address) in the program.• The CPU Unit will execute the instructions remaining in the cycle after the Replacement Start Bitgoes from OFF to ON.• The program will not be executed while the program is being replaced. After the program has beenreplaced, operation will be started again just as if the CPU Unit were switched from PROGRAM modeto RUN or MONITOR mode.• The program will be replaced at the end of the cycle in which the Replacement Start Bit was turnedfrom OFF to ON, i.e., after END(001) is executed in the last task in the program.CJ2 CPU Unit Software User’s Manual10-43