This input is used to activate the load reserve set #3 instead of the set #1, which
is active by default. The set #3 is adjusted by setpoints:
#LoadResStrt 3 and #LoadResStop 3 if the power management is
switched to absolute (kW-based) mode
#%LdResStrt 3 and #%LdResStop 3 if the power management is
switched to relative (%Pnom-based) mode.
CAUTION!
All controllers cooperating together in Power management must have the same
load reserve set selected.
NOTE:
It is possible to use virtual peripheries for distribution of the binary signal from one
physical switch connected to one controller to all other controllers over the CAN
bus. See example in the description of the input Load res 2.