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ECL-PTU-207 Preloaded Applications
Master/Slave Control
Principles
Local temperature management
The slave devices use their own temperature for control. The master device sends information to limit
the slave that uses its own information.
Limiting the slave device in heating // cooling mode avoids having different modes in a single zone.
The slace device always has the same mode as the master.
Centralized temperature management
The slave device uses the master device temperature to control its euipments with nvoSpaceTemp.
The slave device does not use its own temperature but the temperature used by the master device.
Nevertheless, the master device can average the local temperatures sent by the slave devices
(nvoLocalSpaceTemp on the master’s nviSpacetempAvg to send that average value to the slave de-
vices. Master and slace devices all use the averaged temperature from all the sensors within the zone
for control.
The slave device takes the same PID value as the master device via nvoTerminalLoad. The slave de-
vice has the same mode and the same demand as the master. All the control is achieved by the mas-
ter. Nevertheless, the slave keeps its own valve parameters (rescaling).
Temperature setpoint management
The slave uses the same occupancy status as the master via nvoEffectOccup. The slave will therefore
have the same occupancy status as the master, and temperature setpoints will change depending on
this occupancy status.
The slave uses the same setpoint offset as the master via nvoSetPtOffset. The slave therefore has the
same setpoint offset as the master, but uses its own setpoint parameters, which can differ from the
master.
Fan management
The slave uses local control for the automatic control of its fan, if nvoTerminalLoad is unused, but
overrides are managed by the master using nvoFanSpeedCmd. The slave will have the same fan
speed as the master when the occupant manually overrides the fan speed settings with the room de-
vice.
The slave has the same fan speed as the master, whereas in Auto mode or overridden if nvo-
FanSpeed is binded to the slave’s nviFanSpeedCmd. In this case, the slave does not control its fan
any more.
Total Master Management
The slave uses the equipment values from the master using nvoUnitStatus. The slave behavior is
identical to the master.
Master/Slave Control
