This ChangeOver_Block can be used to make change over in the working of primary running device to it's standby device, if there are two devices for same operation. For example, if there are two pumps(one duty and one standby) for pumping water from a tank, and this ChangeOver_Block helps us to swtich the working from duty pump to standby pump if duty pump trip happens or manually turned off for maintenance purpose.

Also, if we want to change operation of pump after a preset duration, that can also be done. For example, if we want to change working pump in every 12 hours, that's also possible.


Inputs

1.OnCondition : Here, we have to give on condition for devices including interlocks(Data Type: Boolean)

2.D1_Auto: Device-1 Auto selection/ Auto mode feedback(Data Type: Boolean)

3.D1_OnStatus: Device-1 running feedback, digital input(Data Type: Boolean)

4.D1_Trip: Device-1 Trip feedback, digital input(Data Type: Boolean)

5.ChangeOverTime: Time duration for changing operation from Device-1 to Device-2 and viceversa(Data Type: Time)

6.D2_Auto: Device-2 Auto selection/ Auto mode feedback(Data Type: Boolean)

7.D2_OnStatus: Device-2 running feedback, digital input(Data Type: Boolean)

8.D2_Trip: Device-2 Trip feedback, digital input(Data Type: Boolean)

9. Reset: For resetting the function


Ouputs

D1On: This output will make Device-1 On

D2On: This output will make Device-2 On


*Note: Both Device-1 and Device-2 will never turn on at same time.