Timer Instructions

After a switchover in a redundancy system, timer-based instructions, such as TON, TOF, and RTO, maintain their original time base so that timing operations remain consistent and uninterrupted. This behavior is critical for high availability because it prevents timing resets or discrepancies that could disrupt process sequencing or cause data integrity issues. However, it is important to verify that any logic dependent on timer completion is designed to handle the continuity correctly, especially in applications where precise timing impacts safety or synchronization.