Hi Marios Koumplis,
If I understand your query correctly; you can use UpdatePropertyValues service. It takes timestamp as one of the input.
For more information please check following Blog: How to use UpdatePropertyValues Service in ThingWorx
Hi Ankit and thanks for the swirft reply,
Apologies for perhaps not making it very clear but I am talking about doing that same thing you mentioned but in the EMS. I am using Modbus to gradually extract historical (logged) values and was wondering if we could update properties with more and more values that all have an older timestamp in my Edge template file.