Events and Limits

[123]

I.
Events:
2. Channel data has changed
3. Channel value has changed
4. Channel status has changed

In the above event settings, I noticed that both point 2 and point 3 record events on the web whenever the value changes. So, what is the difference between point 2 and point 3? What is the meaning of point 4? I am not sure how to simulate point 4. Could you provide a specific method?

II.
Limits:
Deadband

Regarding the above Deadband, how can I simulate it to demonstrate its effect? For example, if I set the value to 100 and the actual value is 85, the value can still be displayed normally on the web. My understanding is that if I set the Deadband to 100, values below 100 should not be displayed, and only values above 100 should be displayed.

[Mikhail]

I. Channel data consists of value and status.
2 – value or status changed
3 and 4 – only one part changed.

II. Use the HelloWorld project. Set limits for channel 105. Change channel 105 manually step by step, and check the channel status.

[oley]

Hi Mikhail,

I tried yesterday and have success with type 3. Channel value has changed.
Unfortunately (it’s not so bad) I need 2 triggers: switch opened and switch closed.
Type 2. Channel data has changed fires every time I’m uploading configuration, and another disadvantage: I can’t define range of channels.

[Mikhail]

Hi,

> Channel data has changed fires every time I’m uploading configuration, and another disadvantage
What event is generated on restart?

[Author]

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