4/5/2016 1:21 PM | |
Posts: 124 Rating: (13) |
Working with Step 7 Lite, for a simple start/stop motor diagram in LAD mode we use a phisical auxiliary power contact as an input. That is applyed in order to guarantee that in case of a break wire of that, the coil will be deenergized. I am sure about this. I couldn't see this possibility in LOGO. Attached the program Start/stop motor in LAD mode. Could you help? Thanks in advance. AttachmentStart stop motor LAD.zip (363 Downloads) |
4/5/2016 2:44 PM | |
Joined: 12/18/2014 Last visit: 9/24/2024 Posts: 33831 Rating: (4204) |
Like this? |
Last edited by: ixo65 at: 4/5/2016 2:51:22 PM |
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4/6/2016 6:49 AM | |
Joined: 12/18/2014 Last visit: 9/24/2024 Posts: 33831 Rating: (4204) |
Then but my first suggestion is still the right thing, if you want the circuit with an RS-relay. I have now the circuit with your designations made in LAD and made a screen video to. The delay only serves to give you time when switching on. AttachmentLatch relay.wmv (295 Downloads) |
4/8/2016 6:48 AM | |
Posts: 124 Rating: (13) |
Hi, Tanks for your answers. I think I resolved the question. It's very easy. I used a Pulse relay where Set has priority over Reset. With a pulse in "start" button, the motor coil goes to state "1" and the coil seal" close. The motor runs. The motor coil only returns to "0" by "stop" button, "termal contact" or a broken wire of "coil seal". See you AttachmentStart stop motor.zip (314 Downloads) |
4/8/2016 5:22 PM | |
Joined: 12/27/2006 Last visit: 8/18/2024 Posts: 1197 Rating: (113) |
Here you have a compleet programm. Your motor must start in 2 sec after the ON button is pressed, else Faulkt Your motor must stop in 2 sec after tghe OFF button is pressend, else Fault Attachmentmotorbeveiliging.zip (305 Downloads) |
4/9/2016 6:17 AM | |
Joined: 12/18/2014 Last visit: 9/24/2024 Posts: 33831 Rating: (4204) |
In your program you have uploaded here, the pulse relay is set with "priority setting before resetting" (see attachment). In my proposals I have always programmed the Stop button as normally closed (NC). AttachmentForni.zip (310 Downloads) |