Topic: DMD0223

Manually Setting the Clock

Manually Setting the Do-more Controller's Date and Time

The Date and Time in a Do-more controller can be set with the PLC -> Set PLC Clock utility of the Do-more Designer Programming software. This utility allows the controller's clock to be synchronized with the connecting PC's clock, or the clock to be set to manually entered values.

The Date and Time in a controller can also be set from an external source by using the Set PLC Date/Time (SETTIME) instruction.

Adjusting for Daylight Savings Time

The clock in the controllers can adjust for Daylight Savings Time, but this adjustment is done manually to avoid conflict with widely varying local laws. The Daylight Savings Time adjustment is done manually with the PLC -> Set PLC Clock utility of the Do-more Designer Programming software.

Daylight Savings Time can be adjusted at runtime through the system variable $SummerTime (ST768). Setting $SummerTime (ST768) to 'true' automatically adds one hour to the local time.

See Also:

• Managing Time Overview
   

• Manually Setting the Clock
   

• Automatically Setting the Clock
   

• Synchronizing the Clocks on Multiple Do-more Controllers
   

• Using the SNTP Client with a Timer Server