Clock memory

You can reach this tabsheet with PLC|CPU properties.

If you click on the check box activated, you can enter a marker byte, whose bits will be switched on and off periodically by the operating system of the virtuell PLC.

The frequencies (in the virtuell time) of the single bits:

If you want to head for a flashing light emitting indicator with the clock memory you should use the special form of the light emitting indicator because otherwise it would be quite difficult to see the flashing as the simulation speed is variable.

Using the 10Hz-Bits please notice that the simulation rate as standard is adjusted to 100 ms and that if the adjustment is maintained the bit always will be '1' or '0'. You can change the simulation rate with View|Options|Simulation