This video gives basic information on Using the TMRADOWN "Accumulating Down Timer" instruction in the Do-more Designer software. It presents information that is commonly missed by users. This WILL NOT be a complete tutorial for the instruction but rather a supplement to the help file and customer experience.
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This is a multi-scan instruction, because it takes multiple scans to complete, it cannot be used in either Subroutines or Interrupt Service Routines. It can used in Programs and under special circumstances can also be used in Stages inside of a Program or in Tasks. See the help topic “Instruction Set Chart” for more information. This instruction when enabled begins to time down to zero. When the timer reaches zero the done bit will turn on. If the reset is true, the timer will be set to the value of the Preset. The reset then has to be turned off before the timer can start timing down.