Like all Provox issues ... it's been awhile.
It appears that you are using Proflex to generate the CHIP downloads
rather than Envox.
I know that the Master Time information is kept in Envox, not sure how
to do it with Proflex.
In general, it is important to remember that Time Sync in provox syncs
devices with the master time node, but doesn't mean that the devices
are synced with an external clock. This typically means that all the
nodes in the provox system will drift away from the actual time
together.
With newer PC based CHIP databases, this gets easier to sync chip with
external clocks.
As for writing the time, I don't believe you can.
You can read the time via the (I am guessing here) TIME parameter of
(if I remember correctly) the LCP point (TIME[1] to TIME[6] give year/
month/day/hour/minute/second (in some order).
So ... what are you trying to do ... (and where are you located) ...
so I can make more appropriate suggestions.