ABB i-bus KNX Product Manual page 42

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
...
- 1.0 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 29 °C and the hysteresis
is 0.5 K (one-sided), the additional stage switches on at 29 °C and off at
28.5 °C.
This parameter is only available if the "Cooling" 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 "Cooling" 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 cooling. The setpoint refers to the base setpoint for cooling (comfort
temperature for cooling) for the basic stage.
Example: the basic setpoint for cooling is set to 26 °C. When the
temperature rises above 29 °C, additional cooling should be switched on
so that the room cools off again rapidly. In this event, set the parameter
"Stage gap for the basic stage to additional stage" to 3 K.
This parameter is only available if the "Cooling" or "Heat and cool" control
functions are used.
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