design the following on Rslogix 500:

Turn on PL3 unless PB3 has been pressed and held for at least 2 seconds, use TON.

3 answers

Here is the ladder logic code for this scenario in RsLogix 500:

(STEP 1) Start
(OTE) (PL3) (Output)
| | (|---|) (|---[ ]------------(T4:0/DN)---|+)---(PB3) (PB3 - Input)
| | | | (| | | Timer | | | | |
| | | | (| | | | | | | |
| | | | (| | | 2s | | | | |
| | | | (| | | | | | | |
| | | | (| | | | | | | |
(STEP 2)END

Here, PB3 is the input connected to a physical pushbutton. PL3 is the output that will be turned on unless PB3 has been pressed and held for at least 2 seconds. The TON timer T4:0 is used to achieve the 2-second delay before turning on the output PL3.

The logic in the ladder diagram is as follows:
- When PB3 is not pressed, the output PL3 will be turned on.
- When PB3 is pressed, the TON timer T4:0 will start counting. If PB3 is released before the timer reaches 2 seconds, the output PL3 will remain on. If PB3 is held for at least 2 seconds, the output PL3 will turn off.

This ladder logic code ensures that PL3 is turned on unless PB3 has been pressed and held for at least 2 seconds.
clean the ladder diagram
Certainly! Here is the simplified ladder logic diagram for the scenario where PL3 is turned on unless PB3 has been pressed and held for at least 2 seconds using a TON timer in RsLogix 500.

```
|-----------------| |---( )----( )---------------------------( )------
| | | T4:0 PB3 (Input)
| |-(TON)-|---( )----| EN |-------
| | 2s | | -----| |---(PB3)--------------|
| | PL3 (Output)
|-----------------|
```