Software 4.1.1.5 Changing the program in run mode, transmitting a module The user program can be changed without interrupting the program run. When you transmit a changed module, the controller needs some time to receive, interpret and insert the module as well as to calculate its checksum. Extension of cycle time: c. 10 % Duration: depends on the length of program and the cycle time 4.1.1.6 Restarting the controller after changes in Stop/ Reset mode Modifying the program memory while the controller is in Stop or Reset mode also modifies the checksum required for the memory test. The checksum is calculated when you restart the controller (RUN).
The controller will resume run mode only when the checksum test has been completed successfully. 41