4.6.8 M/S, Manager/subordinate
The M/S - manager/subordinate function has the following features:
● For large rooms / open spaces, to save energy by synchronizing HVAC
equipment and avoid running different equipment in heating and cooling at the
same room.
● The manager provides the room temperature, setpoint, operating mode heating
/ cooling sequence and humidity value and manual fan speed setting (if
requested) to all subordinates in the same group.
● When P008 (standard display) is set to 1 (Setpoint), the current Comfort
setpoint is always displayed, even if the thermostat works in a different
operating mode.
● A group includes max.1 manager and 9 subordinates.
● Manager and subordinates can be bound as one group via setting their
geographical zone (apart.) P901 and geographical zone (room) P902 to same
value.
● Synchronization works even if the manager and subordinate are different
products or set with different applications.
● The thermostat can be set as subordinate via parameter P258 and each
subordinate can be identified via one identification number (P259). The
identification is relevant with alarm management between subordinate and
manager.
● When the thermostat is set as subordinate, the HMI is locked and users cannot
operate the thermostat locally. At the same time, some parameters are invisible
and non-accessible for setting (see Control parameters [➙ 135]).
● Fan state and setting of M/S - manager/subordinate are independent. The fan
state depends on the fan setting of each device, i.e., manager and subordinate
can display different fan speeds.
● All M/S - manager/subordinate settings are set via mobile app PCT Go, KNX
tools ETS, Synco ACS or locally on the HMI (parameter setting mode).
● Alarm indication: All active subordinate alarms, e.g. condensation alarm, are
displayed on the subordinate. At the same time only the higher priority alarm
(see Alarm management [➙ 66]) is displayed on the manager with subordinate
identification number. This function is available only when a subordinate
identification number is set from 1 to 9. If the identification number is set to Off,
the subordinate does not send alarms to the manager.
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