Central precipitation protection (CenPcpPrt11)
Overview
The application function "Central precipitation protection 11" (CenPcpPrt11) handles one precipitation sensor.
WthStn | Weather station |
PcpDet | Precipitation detector |
Cen | Central functions |
CenPrtShd11 | Central protection shading 11 |
CenPcpPrt11 | Central precipitation protection 11 |
CenPrtShdDlyxx | Central protection shading delay 11...13 |
R | Room |
Z | Shading zone in one room segment |
Shd11 | Shading 11, for shading and daylight use with venetian blinds or awnings, group members |
Use
Precipitation protection is typically used for
- Awnings: To protect against the weight of the water and the elements
- Shading products made of cloth: Protect against the elements
- Motorized windows: Protect against rain
The products go to a configured, safe position during rain or in the event of a faulty sensor.
Protection is not possible, AF CenFrPrtShd11 cannot be disabled.
Other shading products: The AF serves as well as a component of the frost protection function. The products only react together with rain and outside temperature. Configure the position for precipitation and sensor fault on "None" and enable AF CenFrPrtShd11.
Function
The AF reads the precipitation warning from one central precipitation sensor and attenuates the result with switch on and off delays. The result (PcpDet) is provided for monitoring.
The precipitation warning is automatically reset if the delay has expired, or the warning is manually reset.
A BACnet configuration object is used for manual reset over BACnet.
The AF transfers the following to CenPrtShd11:
- A configurable blinds setting (CmdLmExc) in the event the limit value is exceeded.
- A configurable blinds position (CmdSenFlt) in case of a sensor fault (precipitation sensor reports "unreliable").
Hierarchical grouping
This AF supports hierarchical grouping. For detailed information, see Hierarchical grouping.
Interface to local and superordinate functions
Local inputs and superordinate AFs access the same BACnet objects. Evaluation by priority. The local protection input has higher priority than the shading command of the superordinate central functions.
Configuration
Application | Precipitation protection | Frost protection |
|---|---|---|
Mandatory protection situation | Precipitation | Precipitation AND low temperature |
Optional protection situation | Fault precipitation sensor | Fault precipitation sensor |
AF CenPcpPrt11 | Required | Required |
AF CenFrPrt11 | n/a | Required |
Command for limit value exceeded (PcpPrt>CmdLmExc) | Open...Closed | None |
Command for sensor fault (PcpPrt>CmdSenFlt) | None, | None, |
Command for limit value exceeded (FrPrt>CmdLmExc) | n/a | Open...Closed |
Command for sensor fault (FrPrt>CmdSenFlt) | n/a | None, |
objects
Description | Objects | Type | Default value |
|---|---|---|---|
Reset precipitation protection ▶ For manual reset over BACnet | RstPcpPrt | BCnfVal | 0 |
Parameter
Description | Parameter | Default value |
|---|---|---|
Switch-on delay protection function 0...18000 [s] | DlyOnPrt | 100 [s] |
Switch-off delay protection function 0...50 [h] | DlyOffPrt | 3 [h] |
Command on limit exceed 1:None | CmdLmExc | 1:None |
Command on sensor fault Enumeration see CmdLmExc | CmdSenFlt | 1:None |
Interface
Interface | Description | Type | Ref. | Owner |
|---|---|---|---|---|
PcpDet | Precipitation detector | BI | ◉ | Central function / Device |
RstPcpPrt | Reset precipitation protection | BCnfVal | ● | - |
Engineering and commissioning
Precipitation sensor selection and configuration is oriented on the application: High sensitivity for skylights or more tolerance for awnings and frost protection.
The standard settings are designed for frost protection.