Write on change

Ignition
,
1

I have a machine connected to my Ignition system that we are using a photo eye to count pallets as they go by. I have the history of the tag set up like this:

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What I want to happen is every time the tag changes value I want that value to be written to MSSQLDatabase. As I began writing this I noticed the value mode and that I have it set to analog. I have since changed it to discrete and the results are the same. Some of the data comes back to SQL but not all. I assume I need to use a client change event script. I am in the process of learning how to code in python (or any text based code for that matter) but have just begun that. What function would I need to use? Some ideas on the syntax of the script would also be helpful. Thanks

2

Also set your deadband to zero. Do keep in mind that it cannot record faster than the device is being polled by your driver. You may need a different scan class with a faster rate.

3

{added the Ignition 7.9 tag so you hopefully don't get answers targeted at Ignition 8}

1 Like
4

Thanks Phil! I was over complicating it. It was the scan class.

5

Thanks so much but it's actually 7.8

6

There ya go.