Now that we've established a digital input tag to read the mode of the booster pump, and a digital output tag to set the mode of the booster pump to Auto, we require two digital output tags to send signals that will start and stop the booster pump.
Add the "DO10_1 Booster Pump Start" and "DO10_2 Booster Pump Stop" digital output tags to the application.
Name: DO10_1
Area: Tank
Description: Booster Pump Start
Address: 1
Pulse Duration: 3
Name: DO10_2
Area: Tank
Description: Booster Pump Stop
Address: 2
Pulse Duration: 3
Configure all the necessary properties for the tags, including the correct I/O Device property, and Pulse Duration. Do not forget to press the Enter key to set each value in its related field.
The Pulse Duration property signifies the duration of a pulse signal in seconds (or in fractions of a second). The simulated controller uses separate bits for start and stop, and requires pulsed outputs with a duration of 3 seconds.
In contrast, the digital output tag you just created, "DO10_3", did not require a pulsed output as it will be used to sustain auto mode for the booster pump.
Practice your tag development skills by creating these two tags using the information provided.
If you require guidance, please refer to Solution for 8.3 On Your Own Section.
Skills Achieved in Lesson 8
You achieved the following skills and knowledge in Lesson 8:
• Digital output tags are used to send signals from the VTS application to the related physical equipment. The drawing methods for digital input tags are the means by which signals are transmitted to the physical system; and
• The Pulse Duration property can be left blank to indicate that the digital output tag will transmit a sustained signal. A number representing seconds or fractions of a second can be entered if you want to indicate that the digital output tag should transmit a pulsed signal.