PLC Programming Timers Counters - TOF | Timer OFF Instruction RSLogix Studio 5000

Опубликовано: 07 Сентябрь 2018
на канале: SolisPLC

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PLC Programming Timers Counters - TOF | Timer OFF Instruction RSLogix Studio 5000

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The TOF, also known as Timer OFF, an instruction is used to keep track of time of occurrence of certain events. The conditions preceding the TOF instruction will allow the timer to start counting up to a specified value. Unline the TON Instruction, TOF will start counting when the preceding conditions are FALSE. Once this value is reached, the program will set specific internal bits notifying the programmer as well as other instructions within the PLC that the timer has finished counting. Furthermore, experienced developers can leverage the instruction to know when a certain process is being executed.

The TOF instruction is a composite instruction which means that it will contain a timer, integers as well as booleans. Depending on the application, you may not need to use all of them.

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