Synchronization of the clocks on the knitting machine

The evaluations in the Stoll-knit report® software depend on the exact time.
The clocks of the knitting machines and of the SKR3 central unit must therefore be synchronized.

The following problems occur when the clocks are synchronized:

Problems at the synchronization of the clocks

Problem

Solution

Summer Standard time changeover

During the automatic change-over from summer to standard time the event WM_TIMECHANGE is triggered.

Time corrections are specified during the evaluations.

The clocks of knitting machines on which Windows 95 is installed, run imprecisely. Under a high CPU load they stop or run slower.

The Windows clock is reset regularly by clock of the battery card (approx. once per minute).

As the operating time increases, the times of the various components deviate.

When the clock of a knitting machine deviates from the SKR3 central unit by approx. 10 seconds, the knitting machine clock is synchronized with the SKR3 central unit.

Greater time corrections are specified at the the evaluations.

Attempt to enter a date (or time) on the knitting machine.

The entry of the date and time on the user interface of the knitting machine is blocked while the Stoll-knit report® software is active.

Mistake entry of an incorrect date (or time) and its correction on the SKR3 central unit.

Example: By mistake the administrator sets the date of the SKR3 central unit to 7th December, 2011 on 5th December, 2011.
The events of the machines are recorded correctly, however with the time stamp of 7th December, 2011.
On the following day (December 06) the administrator notices the incorrect date and corrects it to December 06 2011. The events of the machines continue to be recorded correctly, with the correct time stamp as from the time correction. However, the database now contains areas that have the same time stamp. Correct evaluation of the data is therefore not possible.

?, -1 or unknown are displayed at the evaluations.