Doing manual entries on a Siemens tachograph. If your last shift before putting your card in for your current shift was in the previous month and you want to show what time you finished on that shift and you arrow down to the 1st of this month then how do you go into the previous month as the tacho won’t let you go beyond the first of this month ? Don’t seem to have that problem with a Stonebridge tacho , thanks all
Rest until now 
It’s over a decade since I used a digital tachograph so take what I say with a pinch of salt 
When making the manual entry and you get to the point where the top line shows the date and time the card was ejected and the bottom line shows the date and time the card was reinserted.
- First change the day number to the the same day number as shown on the top line and hit OK.
- The month number should flash so change the month number to the same month number as shown in the top line.
- If necessary change the year in the same way.
If there’s only one month between the card being ejected and reinserted and you change the day number to less than the day number on the top line the tachograph will think you’re trying to change the date to before when the card was ejected and stop you (not allowed).
Hope that makes sense
Alternatively do as @maoster says and book rest for the entire time
I’m not sure I can remember the steps exactly but I think the issue is the tacho won’t let you have a time or date on screen that is in the future.
So if you ejected on 26/01 and put your card in on 01.02, to make the manual entry for 26/01 you have to ok the day date as 01 first then change the month back to 01, then go back to the day and change to 26 (now possible).
On the roll over of year a similar step is needed.
thanks for your reply. you say (2) change the month number but forgive me if i am wrong but does it not jump from weekday number to time you inserted card?
thanks for reply njl but i thought it jumped from day date past month to start of shift so if i scrolled down to 1st then ok then it would jump past month to time starting shift? please forgive me if im wrong thanks
On a VDO/Siemens digital tachograph when doing manual entries the day month and year are changed individually.
We don’t know when you last used your driver card last month but lets say it was the 20th December.
If in January you put your card in and scroll the manual entry date day down to the 1st, the tachograph will not allow you to do a manual entry for the 1st of December because that was before you last ejected the driver card, so that’s probably why it’s jumping straight to the time rather than the month.
If you ejected the card on the 20th December then when doing a manual entry you change the day number to the 20th and press OK the month number should flash and allow you to change it, again you should only be able to change it to the month when the card was ejected not before.
These digital tachographs are fiendishly clever you know 
If you cant change the day, change the month first.
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I am struggling to visualise it exactly without the head unit and a current manual entry in progress, but I would say click on after the day (no need to alter yet) , then “if’“ changing the month is valid you can then change it, once you have, if applicable, it might take you back to the day or if not you can click back to adjust it accordingly.
Thanks, so if my last shift was 20th December and I’m putting my card in on say 3rd January how can I scroll to match the day (20th) when you can’t go forward up to 20th? Thanks
Why can’t you use the arrow keys to scroll to the 20th before pressing OK 
My understanding is that if you scroll to the 20th (assuming this is the last day the driver card was used) then press OK you should then be able to change the month to the previous month.
If you scroll to the 19th then press OK you will not be able to change the month to the previous month because that would be a date before the card was last ejected.
many thanks