It is possible to define four shifts and set the start hour of each shift. If only three shifts are required, set the start hour of shift four equal to that of shift three. The shift number can be inserted within a message. If the shift counter is programmed as above (1=8, 2=12, 3=18, 4=22), it will be printed as follows:
From the start of Shift 1 to that of Shift 2 (8-12) = 1
From the start of Shift 2 to that of Shift 3 (12-18) = 2, etc.

Спасибо огромное!