9.7 On Your Own

Practice adding Set Value Buttons by configuring one for the "DO10_2 Booster Pump Stop" tag and one for the "DO10_3 Booster Pump Auto" tag.

 

Just like the Set Value Button you just created, the "DO10_2 Booster Pump Stop" Set Value Button should write a "1" to the tag when the button is clicked. The labels should be modified to "Stop" and "Stopping…" according to the purpose of the button.

 

The second button you must create for "DO10_3 Booster Pump Auto" is somewhat different than the "Start" and "Stop" buttons. It must be set to write "0" when it is clicked.

Both "DI10_2 Booster Pump Mode" and "DO10_3 Booster Pump Auto" refer to the same PLC address. Using an appropriate drawing method for "DO10_3 Booster Pump Auto", an operator can cause the output tag to write a "0" signal to the PLC (and out to the booster pump). The booster pump reads this signal and changes mode accordingly. The PLC then reads the change of signal from the booster pump and reports it to "DI10_2". The value of "DI10_2" then changes to "0" and its drawing methods display the value accordingly.

Further, because "DO10_3 Booster Pump Auto" has not been configured with pulse duration and therefore sends a sustained signal, the text of the button should read "Auto" for both State 0 and State 1 labels.

 

As you create the two buttons, place them beneath the "Stop" button as shown in Figure 119.

Figure 119

If you need assistance with the completion of this section, please refer to Solution for 9.7 On Your Own Section.