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3.5.6. Schedule Mode
The thermostat can operate on either a schedule or unscheduled operation.
Schedule Mode Inactive (Unscheduled Operation)
The Schedule Mode set to Inactive is the most basic mode of the thermostat.
The user can change the temperature setpoints on the display, see
Section 3.1., Graphical User Interface (GUI). The setpoints will remain
unchanged until the next manual update on the display.
Schedule Mode Active (Scheduled Operation)
The Schedule Mode set to Active describes the thermostat behavior against a
programmed schedule. To set the Schedule Mode to Active, send a Modbus request
to SCHEDULE ENABLED (register 40129) and write value "1" to enable and "0"
to disable. The scheduled operation (Active) can only be activated by the Modbus
network.
Figure 3-23 - Follow Mode Activated
If a Modbus communication to the thermostat occurs, then it is assumed that there is
a BMS with its own schedule that controls the thermostat. In this case, the internal
schedule is on hold. If the thermostat detects a Modbus communication loss (no
communication addressed to the thermostat during 10 minutes or more), the internal
schedule takes over to control the thermostat. When the internal schedule is running,
Follow schedule will display (see Figure 3-23).
The internal schedule is based on four (4) events/periods for each day, which can be
programmed on a 5-2 days fashion (weekdays and weekend). For each period, the
Start Time, the Thermostat Mode and the Occupancy Mode are set. As per
Section 3.5.2., Thermostat Mode, the Thermostat Mode can be set to either OFF,
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Operation • 23
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