837-A4AX231 A-B  analog module

MC is performed incrementally at the end of every program scan to help prevent a large delay in the program scan. This process adds up to an additional 12 ms to the scan time. For example, if the program scan is normally 10 ms, it may increase to 22 ms during RMC until the update is finished. Similarly, user interrupts may be delayed. ATTENTION: Use extreme caution when you use Run Mode Change. Mistakes can injure personnel and damage equipment. Before using Run Mode Change: • Assess how machinery responds to the changes. • Notify all personnel about the changes.

Uncommitted changes are changes that are made in RMC that have not been accepted or undone after a Test Logic Change is performed. If the controller power loses power while there are uncommitted changes, you cannot reenter RMC upon reconnection. You can choose to download the project again to keep the changes, or upload to discard the uncommitted changes. If you choose to upload a project with uncommitted changes from the controller, you cannot enter RMC until you have done a full download. Run Mode Change (RMC) memory is used to store both the logic and user variable changes made during RMC. The default amount of memory that is allocated is 2 KB and can be increased up to 16 KB. However, there is still a limit of 2 KB for logic and user variables changes per Test Logic. To adjust the amount of RMC memory, the controller must be offline. After you have adjusted the amount, you must build the project and download it to the controller.

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