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.