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Example - Ladder Diagram

DATERD​


The DATERD instruction reads the date from a real time clock (RTC) device and stores the date in 7 WORD data registers starting at D.

Ladder Diagram Example​



When the contact, M0.0, is powered ON (1), the instruction reads the current date and time from the real time clock (RTC) device.

Memory Monitor​


  • The following data is saved into the data registers, D0, D1, D2, D3, D4, D5, and D6:
    • D0: Year (2025)
    • D1: Month (11, November)
    • D2: Day (6)
    • D3: Hour (16)
    • D4: Minute (32)
    • D5: Second (12)
    • D6: Day of the week (4, Thursday)

The clock time reads: 4:32:12 P.M., Thursday, November 6, 2025.

DATERDP​


The DATERDP one-shot instruction reads the date from a real time clock (RTC) device and stores the date in 7 WORD data registers starting at D.
Every time this instruction executes, it energizes the output only once.

Ladder Diagram Example​



When the contact, M0.1, is powered ON (1), the instruction reads the current date and time from the real time clock (RTC) device.

Memory Monitor​


  • The following data is saved into the data registers, D10, D11, D12, D13, D14, D15, and D16:
    • D10: Year (2025)
    • D11: Month (11, November)
    • D12: Day (6)
    • D13: Hour (16)
    • D14: Minute (44)
    • D15: Second (47)
    • D16: Day of the week (4, Thursday)

The clock time reads: 4:44:47 P.M., Thursday, November 6, 2025.