Get old value in Any Change alarm

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1

Hi,

Is there any way to get the old value in an Any Change alarm script? I am using a UDT and a few hundred instances to monitor machine settings. If someone changes a setting, we need to get a notification. But I can only get {value} as the new value.

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Custom Message:
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I try to avoid using the tag on-changed script just to get the previousValue and currnetValue as I will have to manually script email and alarm insertion.

Thanks!