ABB i-bus FCC/S 1 1 Series Product Manual page 171

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ABB i-bus KNX
Parameters
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7.5.1.6.1.1.2.2 Dependent Parameter
Hysteresis
Options:
This parameter is used to specify the hysteresis that is to apply to the setpoint to prevent continu-
ous switching of the controller.
• Upper switching point = setpoint + hysteresis
• Lower switching point = setpoint – hysteresis
Heating controller:
• If the actual temperature is below the lower switching point, the controller switches on.
• If the actual temperature is above the upper switching point, the controller switches off.
Cooling controller:
• If the actual temperature is below the lower switching point, the controller switches off.
• If the actual temperature is above the upper switching point, the controller switches on.
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7.5.1.6.1.1.2.3 Dependent Parameter
Send control value cyclically (0 = cyclical sending disabled)
This parameter is only visible on the selection of the PI continuous (0...100 %) or PI continuous
(0...100 %) for Fan Coil option.
Options:
This parameter is used to specify the cycle time with which the control value is to be sent.
On the selection of the value 0, cyclic sending is deactivated.
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7.5.1.6.1.1.2.4 Dependent Parameter
Activate temperature limitation
Options:
A controller limit temperature can be activated using this parameter. Using the limit temperature,
the controller's control value for this stage can be set to 0 on reaching a parameterized tempera-
ture. In this way, exceeding (heating) or dropping below (cooling) this temperature can be pre-
vented.
An example of the usage of the limit temperature is floor heating, where exceeding a specific tem-
perature must be prevented to protect the material of the floor.
• No: The limit temperature is deactivated.
• Yes: The limit temperature is activated. The following dependent parameters are also dis-
played.
0.3...0.5...25.5
0...15...60
No
Yes
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 171