[Fan22] Fan, 2-speed
Program block, name / node subtype: [Fan22] Fan, 2-speed
Library hierarchy: Ventilation and air conditioning equipment
Family: Fan
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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.
Controls a 2-speed fan.
All alarms generated by the following options stop the fan, block its outputs with high priority (priority 5) and shut down the plant.
This program block has the following optional functions:
Option: Differential pressure monitor (1xBI)
Reads the signal from a differential pressure monitor over the fan and generates an alarm if differential pressure is missing when the fan must run.
Option: Fault (1xBI)
Reads the fault signal from the fan control unit and generates an alarm.
Option: Feedback (1xBI)
Reads the feedback signal, e.g., from a fan control unit, and generates an alarm if feedback is missing when the fan must run.
Option: Maintenance switch (1xBI)
Reads the signal from the maintenance switch and generates an alarm. If active, then the outputs of the fan are stopped with very high priority (priority 2).
Option: Maximum pressure monitor (1xBI)
Reads the signal from a maximum pressure monitor and generates an alarm.
Name | Description | Type | Alarm / Notification class | Trend / Type |
|---|---|---|---|---|
Cmd | Command | MO: Multistate output | No | Yes, 4 |
Name | Description | Type | Alarm / Notification class | Trend / Type |
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Flt | Fault | BI: Binary input | Yes, 4/5 | No |
MntnSwi | Maintenance switch | BI: Binary input | Yes, 5 | No |
DiffPMon | Differential pressure monitor | BI: Binary input | Yes, 4 | No |
PMaxMon | Maximum pressure monitor | BI: Binary input | Yes, 4 | No |
Description |
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Feedback Elements that belong to the further options: Fb1 | Feedback 1 | BI: Binary input | Alarm: Yes | Notification class 4 Fb2 | Feedback 2 | BI: Binary input | Alarm: Yes | Notification class 4 |
There is a logic for fan coasting when switching between stages.