Trigger Function Block

This Trigger function block detects the pulses.

Figure 1: Trigger Function Block

Figure 2: Trigger Function Block Property Sheet

Input

Input Name

Description

In

This is a Boolean point input slot.

If In is connected the very first time, there is a change from "null" = "true" or "false". That leaves Out as "false".

If In is "null", Operation = RisingEdge or FallingEdge or RisingOrFallingEdge, Out = "null".

If In is "null", Operation = Off, Out = Off.

Table 1: Input of Trigger Function

Output

Output Name

Description

Out

Output = "true" or "false" (depends on selected operation).

Table 2: Output of Trigger Function

Parameter

Parameter Name

Description

Operation

There are 4 operations:

Rising Edge: When In changes from "false" to "true", Out is set to "true" for 1 DDC cycle.

Falling Edge: When In changes from "true", to "false", Out is set to "true" for 1 DDC cycle.

Rising or Falling Edge: When In changes from "false" to "true" or "true" to "false", Out is set to "true" for 1 DDC cycle.

Off: Out is set as "false" no matter what In is.

Out Save

Master Sync Enabled : If you set it to "true" the last output will be set as output for one cycle after the controller restarts. The application can use it to return to the same state before the controller restart.

Out: To enable or disable the Out feature.

Table 3: Parameter of Trigger Function

RisingEdge

Input value is rising from "false" to "true", block triggers "true" pulse on the output for 1 DDC cycle.

Figure 3: RisingEdge

FallingEdge

Input value is falling from "true" to "false", block triggers "true" pulse on the output for 1 DDC cycle.

Figure 4: FallingEdge

RisingAndFallingEdge

Input value is rising from "false" to "true" or from "true" to "false", block triggers "true" pulse on the output for 1 DDC cycle.

Figure 5: RisingAndFallingEdge

Examples

1.       Rising Edge

 

 

 

 

 

Figure 6: RisingEdge Functional Block

 

 

 

 

 

 

 

Figure 7: RisingEdge Property Sheet

 

2.       Falling Edge

Figure 8: FallingEdge Functional Block

 

 

 

 

 

 

Figure 9: FallingEdge Property sheet

3.       Rising or falling Edge

 

 

 

 

 

Figure 10: Rising or FallingEdge Functional Block

 

 

 

 

 

Figure 11:Rising or FallingEdge Property sheet

Refer to General for general information about IRMN4 Function Blocks.