Sylk Actuator Input

The Sylk actuator input controls the controller output or actuator travel time. The actuator travel time is the time required by the actuator to travel from 0 % to 100 % open or 100 % to 0 % open. This time interval varies depending on the type of actuator and ranges from 0 to 500.

Figure 1: Sylk Actuator Input Function Block

Figure 2: Sylk Actuator Input Property Sheet

Inputs

Input Name

Description

In

To provide the value from the controller to the Sylk actuator.

Table 1: Inputs of Sylk Actuator Input Function

Output

Output Name

Description

NA

NA

Table 2: Output of Sylk Actuator Input Function

Parameters

Parameter Name

Description

sylkDevice

Select the required SylkActuator device from the drop-down menu.

status

This field is read-only. Shows the following status of the parameter:

  • alarm

  • fault

  • overridden

  • disabled

  • down

  • stale

  • null

  • unackedAlarm

For further details, see Sylk Component Status Behaviors.

faultCause

This field is read-only. It indicates the cause of the parameter's fault state. This property is empty unless a fault occurs. When multiple errors occur, the fault cause displays only the top errors on the list. If the error is resolved, the next error message will be displayed.

sendInterval (Seconds)

Send interval is the time between the end of a timeout period or completion of a network request and the next request for data on the network. Default is 5 seconds.

senDelta

CSenDelta is another name for the delta value for Significant Event Notification. It allows the controller to send the input parameter value to the Sylk device only when the difference between the last sent value and the current value is greater than or equal to senDelta. Otherwise, the value change will not be propagated to the Sylk device

Example: Assume senDelta is set to 2, the last sent input parameter value is 2, and the current value is 5. The difference in parameter values is 3 (5-2=3), which is greater than the value of senDelta (such as 2). This enables the controller to send the current value of the input parameter (such as 5) to the Sylk device.

It is introduced to control the increase in network traffic caused by frequent changes in the values of input parameters. This can be used to tune the controller so that minor value changes do not propagate to the network. The senDelta value is set to 0.5 by default.

Note: The senDelta feature is only available if the sendInterval is set to "Cov". A senDelta of zero indicates that any change in value is significant and is propagated to the network

senDeltaNote

The senDelta recognizes the value only when the sendInterval is set to "Cov".

enableFD

The time it takes for a failure to be reported to the Sylk device.

Yes: If the parameter has not received an update from the BACnet network source within the fail detect time, an alarm is generated, and the current value is set to invalid.

Note: The time it takes to detect a failure is determined by the update rate that has been set.

No: No means that the object will retain the last value written to it until the BACnet network source changes.

FDInterval

TFDInterval for Sylk actuator input parameter is 20 secs.

inputType

There are two types of Sylk actuator inputs actuator command and actuator travel time:

  • Actuator: Actuator command comes from the controller output. An actuator moves as per the command.

  • Actuator Travel Time: The Actuator travel time is the time required by the actuator to travel from 0 % to 100 % open or 100 % to 0 % open. This time interval depends on the actuator type and varies from 0 to 500 seconds.

note

Send interval must be less than one-third of Fail Detect interval (if Fail Detect is enabled) to ensure proper functionality.

Table 3: Parameters of Sylk Actuator Input Function

Refer to General Description for general information about IRM N4 Function Blocks.