4.ON Delay Timer, OFF Delay Timer, Pulse Timer

 

ON Delay Timer

An ON delay timer is a type of timer that is commonly used in industrial control and automation systems. It is designed to delayed turning on of a device or output after a triggering event has occurred.

In an ON delay timer, when the trigger signal is received, the timer starts counting down a preset time delay. After the time delay has elapsed, the output of the timer is activated, and the device or output that it controls is turned on.

For example, an ON delay timer might be used to delay the start of a conveyor belt after a sensor detects the presence of a product on the belt. This delay allows time for the product to be properly positioned before the belt starts moving.

ON delay timers can be configured to operate in different modes, such as single shot, interval, or cyclic. They can also have different timing ranges and accuracy levels, depending on the specific application requirements.



OFF Delay Timer

An OFF delay timer is another type of timer commonly used in industrial control and automation systems. It is designed to delay the turning off of a device or process after a triggering event has ceased.

In an OFF delay timer, when the trigger signal is received, the timer starts counting down a preset time delay. After the time delay has elapsed, the output of the timer is deactivated, and the device or process that it controls is turned off.

For example, an OFF delay timer might be used to keep a fan running for a certain period of time after the temperature in a room has dropped below a certain threshold. This delay allows the fan to continue to circulate air and maintain the desired temperature even after the initial triggering event has ended.

OFF delay timers can also be configured to operate in different modes, such as single shot, interval, or cyclic, and can have different timing ranges and accuracy levels, depending on the specific application requirements.



PULSE Timer

A pulse timer, also known as a one-shot timer, is a type of timer used to produce a single output pulse of a fixed duration when triggered.

In a pulse timer, when the trigger signal is received, the timer starts counting down a preset time delay. Once the time delay has elapsed, the output of the timer is activated for the duration of the pulse width, which is typically a fixed duration set by the timer. After the pulse width has elapsed, the output is deactivated.

For example, a pulse timer might be used in a machine control system to activate a solenoid valve for a fixed duration to control the flow of fluid in a pipeline. The pulse timer can be triggered by a sensor detecting the presence of fluid, and once the timer output is activated, the solenoid valve will open for the preset duration of the pulse width.

Pulse timers can have different timing ranges and accuracy levels, depending on the specific application requirements. They can be programmed to produce output pulses of different widths.




FURTHER:https://automation-4-u.blogspot.com/2023/04/5up-counter-down-counter-up-down-counter.html



Comments

Post a Comment

Popular posts from this blog

1.Introduction to PLC

Image
  Introduction This knowledge is meant to supply you with basic information on PLC . Control engineering has evolved over time. In the past humans were the main method for controlling a system. More recently electricity has been used for control and early electrical control was based on relays. These relays allow power to be switched on and off without a mechanical switch. It is common to use relays to make simple logical control decisions.  The development of low cost computer has brought the most recent revolution, the Programmable Logic Controller (PLC). The advent of the PLC began in the 1970s, and has become the most common choice for manufacturing controls. PLCs have been gaining popularity on the factory floor and will probably remain predominant for some time to come. Most of this is because of the advantages they offer. ·            Cost effective for controlling complex systems. ·          Flexib...
Read more

5.UP Counter, DOWN Counter, Up-Down Counter

Image
  UP COUNTER(CTU) CTU stands for Count Up Timer, which is a type of electronic timer used to count the number of events that occur and display the result. In a CTU timer, the count value increases by one each time a triggering event occurs, and the timer counts up to a preset maximum value before resetting to zero and starting again. A CTU timer typically consists of a register to store the current count value and a clock input to trigger the counting process. When the clock signal is applied, the counter increments the current count value by one. The new count value is then stored in the register, and the output device such as a display or computer interface displays the current count value. For example, a CTU timer might be used in a factory to count the number of products that pass through a conveyor belt. The CTU timer can be triggered by a sensor detecting the presence of the product, and once the CTU counter reaches the preset maximum value, it can generate an output si...
Read more