A4U DINT to Time of Day Conversion Control Block – Reliable Time Formatting for PLC Scheduling and Event Logic

The A4U DINT to Time of Day Conversion Control Block provides a structured and reusable solution for converting separate numeric Hours, Minutes and Seconds values into a standardized TIME_OF_DAY format within PLC-based industrial automation systems. The block accepts three DINT inputs representing the hour, minute and second portions of a time value and combines them into a single TIME_OF_DAY output that can be used by time-based control logic, scheduling functions, alarm handling, event triggering, logging and time comparisons. Before conversion, the block validates the input values to ensure they remain within valid time ranges, with hours limited from 0 to 23 and minutes and seconds limited from 0 to 59. When the values are valid, the block generates the corresponding TIME_OF_DAY value; when an invalid value is detected, the parameter-error output is activated and the time output is not updated. This helps prevent incorrect time settings from being propagated into downstream automation logic. The block is particularly useful where time values are entered or calculated as separate numerical fields but the PLC application requires a standardized time-of-day data type for scheduled starts and stops, alarm time configuration, timestamp-related logic or event-based operations. Because it is designed as a standard master control block, it can be integrated into different automation architectures that use compatible time-of-day data handling. By combining numeric time inputs, range validation, standardized TIME_OF_DAY conversion and parameter-error monitoring within one reusable structure, the A4U DINT to Time of Day Conversion Control Block provides a consistent foundation for reliable time-based automation and scheduling functions.