CH 7: Timers, Counters, and Integers

Front

What does the TON (Time On Delay) instruction do in RSLogix?

Back

Begins timing when the rung goes from false to true.

Front

What is the function of the TOF (Time Off Delay) instruction?

Back

Starts timing when the rung goes from true to false.

Front

What does RTO stand for in RSLogix?

Back

Retentive Time On

Front

What is the main difference between the TON and TOF instructions in PLC programming?

Back

TON retains accumulated time when the rung goes false.

Front

What is the purpose of the T4:0/TT bit in a timer?

Back

It is true when the timer is counting.

Front

What is a common use for a debounce timer in PLC programming?

Back

To prevent output flickering due to real-world input

Front

What is one reason for using timers in a tank filling system?

Back

To maintain a stable water level

Front

How can timers help in a garage door system?

Back

By ensuring the door opens and closes in the correct amount of time

Front

What is a potential issue if the low-level sensor in a tank does not trigger?

Back

The tank will not fill as intended

Front

What is the purpose of using a TOF timer in a system?

Back

To avoid hydraulic shock from water momentum