Description
Used to delay logic. Three types are available: T_ON, T_OFF and Pulse.
Function
This function block can be used to:
- Delay switch-on and switch-off signals.
- Trigger a pulse with a configurable pulse width.
Function | Timing diagram |
|---|---|
T_ON |
Ti- Time delay If the input signal [In] changes from 0 to 1 and remains as 1 unchanged, the output signal [Out] changes to 1 after a delay of [Ti] seconds. If the [Ti] time has not elapsed but the input [In] signal changes to 0, the command is invalid. |
T_OFF |
Ti- Time delay If the input signal [In] changes from 1 to 0, the output signal [Out] changes to 0 after a delay of [Ti] seconds (or minutes). If the [Ti] time has not elapsed but the input [In] signal changes to 1, the command is invalid. |
Pulse |
Ti- Time delay When the input signal [In] changes from 0 to 1, the output signal [Out] changes to 1 and remains unchanged for [Ti] seconds (or minutes). |
Input
PIN | Description |
|---|---|
Input1 | Time settings |
Input2 | Input signal |
Output
PIN | Description |
|---|---|
Output | Output signal status |
Input value
PIN | Data type | Unit | Default value | Range |
|---|---|---|---|---|
Input1 | Analog | Second | N/A | N/A |
Input2 | Digital | N/A | N/A | 1, 0 |
Output value
PIN | Data type | Unit | Default value | Range |
|---|---|---|---|---|
Output | Digital | N/A | N/A | 1, 0 |
Example
At start-up, the unit switch is closed, the air valve is open, and the fan turns on 90 seconds later. At shutdown, the unit switch is open, the fan is off, and the air valve turns off after 60 seconds.
