OK, this is my block trtansformed in SCL (not tested yet!). Apart from mostly copying bytes to other location does nothing, also if for example SetTime bit is set during the sequence it will work with unpredictable result, because there is no latching or blocking call while still in execution?? But this can be solved, rather I still don't understand why we ned this job mailbox and what the commmand 40 does exactly.

If the time from panel is received, it could be simply compared with PLC time and if they differ a lot do the update, why this mailbox is needed anyway?

Perhaps I will rearange the SCL source to make it more stable and less code and post a new source, but this shall work the same as the code provided by Siemens in STL.