DDE reference enables to get a creation time of value:

= D_2000|ARCH_TIME!blname_N

D_2000 - DDE Server name (required)

TIME - requirement for time of value assignment

blname_N is a string consisting from:

• blname - logical name of archive block (COM_ID)
• N – consecutive number of archive value within the archive block

The example of DDE reference is - here.