# FireDamperMot
## `FireDamperMot` (FB)
FUNCTION\_BLOCK FireDamperMot
### Short description
> Control of a motorized fire damper with two position feedbacks\
> Additional functions: functional test of the fire damper\
> Typical application: control of a fire damper in an HVAC system
### Representation
### Function description
#### General
This function block controls a binary motorized fire damper (*xEn* = TRUE), monitors the run times during the opening and closing processes and can perform a full fire damper test.\
The function block can be operated either in normal mode or in test mode.\
Test mode has higher priority than normal mode and can be triggered by a rising edge at the input *xTestEx* and/or at the setpoint / parameter **xRunTest** is triggered.
#### Release for opening / closing the fire damper before manual override *xAB*
The release for opening / closing the fire damper before manual override *xAB* is passed unchanged from the request to open / close the fire damper *xEn* if the fire damper test is not active.
#### Release for opening / closing the fire damper after manual override *xHB*
The release for opening / closing the fire damper after manual override *xHB* corresponds to the release for opening / closing the fire damper before manual override *xAB* additionally extended by a manual override module
| *xAB* | **eManModeB** | *xHB* | Notes |
| ----- | -------------- | ----- | ---------------------------------------------- |
| FALSE | eMANBIN.Auto | FALSE | Manual override module in automatic |
| TRUE | eMANBIN.Auto | TRUE | Manual override module in automatic |
| X | eMANBIN.ManOn | TRUE | Manual override module in manual operation On |
| X | eMANBIN.ManOff | FALSE | Manual override module in manual operation Off |
Legend: X = any
#### Aggregate fault *xAlarm*
The aggregate fault *xAlarm* is activated (= TRUE) if at least one of the conditions described below is met:
1. The fault message for the opening feedback *xAlarmOpen* is active (= TRUE).
2. The fault message for the closing feedback xAlarmClosed is active (= TRUE).
3. The fire damper is not fully open (xOpen = FALSE).\
(Background: Any not fully open fire damper represents a faulty condition).
4. The input \*xAlarmIn\* is active (= TRUE).\
\
In all other cases the collective fault xAlarm is not activated (= FALSE).
#### Enable / disable of the fault message for the opening feedback *xAlarmOpen*
Monitoring of the damper run time during the opening process against an adjustable maximum value (**tOpen**) starts if in normal operation at least one of the conditions described below is met:
1. A rising edge (FALSE > TRUE) is detected at the output *xHB* detected (= normal case).
2. The request to open is active (xEn = TRUE) and at the same time a rising edge (FALSE > TRUE) is detected at the input xQuit.
3. The output xHB is active (= TRUE) and at the same time a falling edge (TRUE > FALSE) is detected at the input xOpen.
\
\
The fault message for the opening feedback xAlarmOpen\* is activated (= TRUE) if after expiration of the maximum run time **tOpen** with active output (xHB = TRUE) at least one of the following conditions is met:\
1. The feedback for full opening is not active (xOpen = FALSE) (= normal case).
2. The feedbacks **xOpen** or **xClosed** have the same state.
The fault message for the opening feedback xAlarmOpen is deactivated (= FALSE) if a rising edge (FALSE > TRUE) is detected at the input xQuit.
#### Enable / disable of the fault message for the closing feedback *xAlarmClosed*
Monitoring of the damper run time during the closing process against an adjustable maximum value (**tclose**) starts if in normal operation at least one of the conditions described below is met:
1\) A falling edge (TRUE > FALSE) is detected at the output *xHB* detected (= normal case).\
\
2\) The request to close is active (xEn = FALSE) and at the same time a rising edge (FALSE > TRUE) is detected at the input xQuit.\
\
The fault message for the closing feedback xAlarmClosed is activated (= TRUE) if after expiration of the maximum run time tClose with inactive output (xHB = FALSE) at least one of the following conditions is met:\
\
1\) The feedback for full closing is not active (xClosed = FALSE) (= normal case).\
\
2\) The feedbacks xOpen or xClosed have the same state.\
\
The fault message for the closing feedback xAlarmClosed is deactivated (= FALSE) if a rising edge (FALSE > TRUE) is detected at the input xQuit.
#### Duration of the last full opening *tLastOpen*
The measurement of the duration begins each time if at least one of the conditions described below is met:
1\) A rising edge (FALSE > TRUE) is detected at the input *xOpen* detected.\
\
2\) A falling edge (TRUE > FALSE) is detected at the input xOpen.\
\
3\) A rising edge (FALSE > TRUE) is detected at the input xClosed.\
\
4\) A falling edge (TRUE > FALSE) is detected at the input xClosed. (Normal case)\
\
5\) A rising edge (FALSE > TRUE) is detected at the output xHB.\
\
6\) A falling edge (TRUE > FALSE) is detected at the output xHB.\
\
At this output, after every rising edge on the full opening feedback xOpen (FALSE > TRUE), the run time is available.
#### Duration of the last full closing *tLastClosed*
The measurement of the duration begins each time if at least one of the conditions described below is met:
1\) A rising edge (FALSE > TRUE) is detected at the input *xOpen* detected.\
\
2\) A falling edge (TRUE > FALSE) is detected at the input xOpen. (Normal case)\
\
3\) A rising edge (FALSE > TRUE) is detected at the input xClosed.\
\
4\) A falling edge (TRUE > FALSE) is detected at the input xClosed.\
\
5\) A rising edge (FALSE > TRUE) is detected at the output xHB.\
\
6\) A falling edge (TRUE > FALSE) is detected at the output xHB.\
\
At this output, after every rising edge on the full closing feedback xClosed (FALSE > TRUE), the run time is available.
#### Duration of the current opening / closing in *tRunTime*
During each run time measurement the current run time is available at this output.
#### Testing the functions of the fire damper (test mode)
Test mode is always generally triggered if at least one of the conditions described below is met:
1\) A rising edge (FALSE > TRUE) is detected at the input *xTestEx* detected.\
\
2\) The active state (= TRUE) is detected at the setpoint / parameter xRunTest. The active state is immediately reset (= FALSE) after detection.\
\
However, the actual test mode only takes place if the feedback of automatic mode eAOO (0 = automatic, >0 = manual) contains the value 0 and at the same time the operating mode of the manual override for the digital output xHB signals automatic mode (eMANBIN = eMANBIN.Auto).\
\
In test mode a closing and subsequent opening of the fire damper take place, each with run time monitoring. At the beginning of the test mode the outputs xAlarmOpen, xAlarmClosed, tTestOpen, tTestClosed and xTestOK are reset (= FALSE).\
\
Now the control command for closing is triggered and the run time is monitored for exceeding the maximum value **tClosed** monitored. If the correct feedback situation (xClosed = TRUE and xOpen = FALSE) is reached without exceeding the maximum value, the output xAlarmClosed is not activated (= FALSE). In all other situations the output xAlarmClosed is activated (= TRUE).\
\
Now the control command for opening is triggered and the run time is monitored for exceeding the maximum value **tOpen** monitored. If the correct feedback situation (xOpen = TRUE and xClosed = FALSE) is reached without exceeding the maximum value, the output xAlarmOpen is not activated (= FALSE). In all other situations the output xAlarmOpen is activated (= TRUE).\
\
The result indicator for the fire damper test xTestOK is activated (= test successful) if neither of the two outputs xAlarmOpen or xAlarmClosed is active (= TRUE). The values achieved **tLastOpen** and **tLastClosed** are each placed on the outputs **tTestOpen** and **tTestClosed** and stored until the next fire damper test.\
\
The test mode ends automatically as soon as the fire damper check is completed.
#### Prerequisites
> **Prerequisite for the use of the function block FireDamperMot**
>
> The use of the TimeRead2 function block is required for correct operation.
### CODESYS
InOut:
| Scope | Name | Type | Initial |
| ----------- | -------------- | -------- | ------------ |
| Input | `xEn` | `BOOL` | |
| Input | `xAlarmIn` | `BOOL` | FALSE |
| Input | `eAOO` | eManBin | eManBin.Auto |
| Input | `xOpen` | `BOOL` | |
| Input | `xClosed` | `BOOL` | |
| Input | `xQuit` | `BOOL` | FALSE |
| Input | `xTestEx` | `BOOL` | FALSE |
| Output | `sLine1` | `STRING` | |
| Output | `sLine2` | `STRING` | |
| Output | `sText` | `STRING` | |
| Output | `xHB` | `BOOL` | |
| Output | `xAB` | `BOOL` | |
| Output | `xAlarm` | `BOOL` | |
| Output | `xAlarmOpen` | `BOOL` | |
| Output | `xAlarmClosed` | `BOOL` | |
| Output | `xTestOK` | `BOOL` | |
| Output | `tLastOpen` | `TIME` | |
| Output | `tLastClosed` | `TIME` | |
| Output | `tTestOpen` | `TIME` | |
| Output | `tTestClosed` | `TIME` | |
| Output | `tRunTime` | `TIME` | |
| Output | `xAuto` | `BOOL` | |
| Input Const | `udiOpen` | `UDINT` | 150 |
| Input Const | `udiClose` | `UDINT` | 25 |
| Input Const | `eManModeB` | eMANBIN | eMANBIN.Auto |
| Input Const | `xRunTest` | `BOOL` | FALSE |
| Input Const | `sEditLine2` | `STRING` | ‘’ |
| Input Const | `sEditLine1` | `STRING` | ‘Room’ |
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