Delay on and delay off

One Run signal drives two outputs. The conveyor starts after a delay. The cooling fan starts at once and runs on after Run turns off.

Step by step

Pick a step. The rungs are drawn by the editor after Core scans the program up to that step.

Global.Run

Global.StartDelay

PRE 1200 ACC 0 EN 1 TT 1 DN 0

Global.StartDelay.DN

Global.Conveyor

Global.Run

Global.FanRunOn

PRE 1200 ACC 0 EN 1 TT 0 DN 1

Global.FanRunOn.DN

Global.Fan

1. Run on. The TOF sets DN at once, so Fan starts. The TON starts timing, so Conveyor waits.

Step	Run	FanRunOn.DN	Fan
1. Run on	1	1	1
2. Scan 2	1	1	1
3. Run off	0	1	1
4. Scan 4	0	1	1

A TON's DN turns on only after its rung has been true for PRE. It turns off the moment the rung goes false.
A TOF's DN turns on the moment its rung goes true. After the rung goes false, DN stays on for PRE, then turns off.
Each step here is one scan, 600 ms apart.

Swapping TON and TOFTON delays turning on. TOF delays turning off.
Reading the TOF rung instead of DNThe run-on is only in DN. A coil driven by Run turns off at once.