ABB i-bus KNX Product Manual page 40

ABB i-bus KNX
© 2009 Busch-Jaeger Elektro GmbH – A Company of the ABB Group
Commissioning
Hysteresis (one-sided)
Options: - 0.0 K
- 0.1 K
- 0.2 K
- 0.3 K
...
- 1.00 K
...
- 2.00 K
The parameters "Interval of additional level" and "Hysteresis (one-sided)"
enable you to specify when the additional stage switches on and off. For
example, if the setpoint for the additional stage is 18 °C and the hysteresis
is 0.5 K (one-sided), the additional stage will switch on at 18 °C and off at
18.5 °C.
This parameter is only available if the "Heating" or "Heat and cool" control
functions are used.
Cycle time for sending of control value (0 - inactive, min)
Options: - 0 / 1 / 2 / ... / 60
The room thermostat can send the control value, even if the value remains
unchanged. This is often required since the connected actuator otherwise
assumes that the room thermostat is no longer available. This enables
the actuator to activate its force-position control, which is only deactivated
when a new control value is received.
The cycle time for automatic sending is adjustable. Cyclic sending can
also be disabled.
This parameter is only available if the "Heating" or "Heat and cool" control
functions are used.
Interval of additional level (values changed by (0..127)x0.1 K)
Options: - 0
- ...
- 30
...
- 127
Value range 0..127 corresponds to 0K..12.7K
This parameter allows you to specify the setpoint of the additional stage
for heating. The setpoint refers to the base setpoint for heating (comfort
temperature for heating) for the basic stage.
Example: the basic setpoint for heating is set to 21 °C. When the
temperature falls below 18 °C, additional heating should be switched on
so that the room heats up again rapidly. In this event, set the parameter
"Stage gap for the basic stage to additional stage" to 3 K. This may be
necessary after automatic night setback, if the user wishes to use the
room immediately (e.g., the bathroom early in the morning).
This parameter is only available if the "Heating" or "Heat and cool" control
functions are used.
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