The Timers section contains examples of delaying the turn-on or turn-off of an output.

But if you need to model a delay in a value due to propagation (e.g. temperature change propagated by conduction, or composition change propagated by flow through a pipe), then a "delay line" is needed.

A delay line is a sequence of registers, through which a value is shifted, one step per cycle.

Using thermal conduction as an example, register $105 might contain the temperature of the external surface of a container that was the temperature of the inner surface of the container, in $100, 10 seconds earlier (where CycleTime = 2 seconds).

If required, the value could be attenuated as well as being delayed - one might do this, for example, to model some heat dissipating as it is conducted from the inner to the outer surface of the container: