25-PM1-B024 A-B  Control Unit

If insufficient RMC memory is available to make more changes (for example, a “not enough memory” error message appears during the RMC build or Test Logic), then you must perform a full download to transfer the incremental changes from the RMC memory to the standard user program and data memory. Transfer Contents in RMC Memory to Controller Memory The changes that you made during RMC are stored in the RMC memory and remain there until you perform a full build and download (while the controller is disconnected).

Take note of the following limitations when using the Run Mode Change (RMC) feature: • You cannot make configuration changes (for example, change filter times). • You can add up to 2 KB of logic (approximately 150 boolean instructions) and user variables for each Test Logic. • You can increase the total memory allocated for RMC (cumulative of all Test Logic Changes) from 2 KB to 8 KB, but the 2 KB limit for logic and user variables per Test Logic remains. • You can add a total of 20 Program Organizational Units (POU) for each RMC (for example, if you currently have 5 POU, you can add 20 more for a total of 25 POU). • If you modify a user defined function block (UDFB) that changes the local variables, the local variables are reinitialized or reset to zero and a warning message shows during the build. If you want to reapply the initial value, right-click on the UDFB and select Refactor > Reset Initial Values of Instances. • RMC is not possible after you perform a Discover Project operation, if a new module is detected, because the configuration has changed. • You cannot import exchange files when in RMC because an import is considered a configuration change.

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