Coordination of up to 8 demand signals with minimum runtime and delay.
The input variables for the cascade stages inform the module of the status of each of the demand
signals. The digital input signals for the cascade stages can come from heating, DHW or cooling
demands. But any other digital signal can also be used for this (e.g. a signal from another function
or from an input). This allows a high degree of programming freedom in the use of the Cascade
function.
Digital input signal, ON/OFF, for separate enabling of the 8 possible
generators (digital value, ON/OFF)
Digital input signal, ON/OFF, for control of the 8 possible cascade
stages (digital value, ON/OFF)
➢ Designations A – H refer to the generators themselves, which is to say the boilers or heat
pumps, for example. The associated index (e.g. A1, A2, A3, etc.) relates to the stages of the
generator, if a multi stage generator is being used.
➢ Designations 1 - 8 refer to the cascade stages that are currently active.
➢ Enable generator A – H: This allows individual generators to be blocked, removing them
from the control structure of the cascade stages. Blocked generators are skipped in the
sequence of stages. When using a multi stage generator, each stage of the generator can
be enabled.
➢ Cascade stage 1 – 8: These input signals can come from the Demand output variable of
one or more heating demand functions. But any other digital signal can also be used for this
(e.g. a signal from another function or from an input).
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