[FdpTst21] Fire damper test, operating state
Program block, name / node subtype: [FdpTst21] Fire damper test, operating state
Library hierarchy: Ventilation and air conditioning functions
Family: FdpTst
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Configurator
Program blocks are stored in the library without I/Os. Use the auto-create and auto-connect functions to create I/Os and/or to connect them to the interface blocks, e.g., R_A, CMD_B. Alternatively, take the I/Os from the folder containing the predefined I/Os in the library and/or from the plant and connect them to the interface blocks.
Initiates a fire damper test (with a software button or scheduler). The start of the fire damper test stops the plant and first sends a command to open the dampers, and, after a specific time, it sends a command to close the dampers.
The time set for waiting after the command to open and close the dampers must be longer than their opening and closing times.
The evaluation of the fire damper test takes place in the fire damper groups. FdpGrp21 and FdpGrp22 have an optional interface, the "Fire damper test", and test evaluation logic, and a value object that display the result of the test.
Name | Description | Type | Alarm / Notification class | Trend / Type | |
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SttTst | Start test | BCnfVal: Binary configuration value | N/A | No | |
TstFnct | Test function | BCalcVal: Binary calculated value | No | No | |
Sched | Scheduler | BSchedule: Binary scheduler | N/A | No | |
Itf | Interface | MCalcVal: Multistate calculated value | No | Yes, 4 | |
The logic starts. First, the test stops the plant and waits until the value of the In progress pin returns to false. Second, it sends an Open command to the fire damper groups and waits for a time that must be set to be longer than the opening time of the fire dampers. Then, it sends a Close command and waits again for a time that must be set to be longer than the closing time of the fire dampers.
This program block needs a fire damper group (FdpGrp21 or FdpGrp22) as a partner, because the fire damper groups are equipped with an optional logic to read the Multistate calculated value (MCalcVal) of the element Interface (Itf) from the program block and to perform the test and log the test result.