Description
The RS function block is used for start/stop control.
Function
The RS block is equivalent to an RS trigger with R-reset taking precedence, i.e., if both the reset and set signals are true, the output is false.
Input
PIN | Description |
|---|---|
RS_R | Reset signal |
RS_S | Set signal |
Output
PIN | Description |
|---|---|
RS | If the reset signal is true and the set signal is false, the output is false. If the reset signal is false and the set signal is true, the output turns true. The output state remains unchanged if both signals are false, and turns false if both are true. |
Input value
PIN | Data type | Unit | Default value | Range |
|---|---|---|---|---|
RS_R | Digital | N/A | N/A | 1, 0 |
RS_S | Digital | N/A | N/A | 1, 0 |
Output value
PIN | Data type | Unit | Default value | Range |
|---|---|---|---|---|
RS | 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.
