Siemens SANTIS-ab User Manual page 15

Emergency Mode Priority Switch
Command-No / Meaning
210 emergency mode
priority
*) First hooked off, first served
Emergency mode means failure of the mains. Then only one
terminal equipment can be operated at either the S- or one of both
the a/b-interfaces. The preferred interface can be selected by this
command.
If set to '1', the emergency priority of all the S-bus terminal
equipments must be disabled.
Restrictions:
The switch is only available in the NT+2ab mode.
NT+2ab/CA restr.: Can only be set by authorized persons.
Pairgain: Automatically set to '1' and can not be changed.
Parameter value
0 = S-interface
1 = a/b-interface *)
Default
0
15