Originally Posted by
Mark E
I’m confused (it’s my age and easily done)…
So I have a P4 and a 6E Powerbar (and other stuff too) together with more than 2 level sensors..
I want to achieve three things.
First, if sensor 1 is low I want sockets 1 and 2 on, socket 3 on for 5 minutes (300 seconds) and socket 4 on after a delayed start of 5 minutes. When sensor 1 is high then all sockets go off.
Second on a maintenance command and if sensor 2 is low I want sockets 1 and 2 on, socket 3 on for 5 minutes and socket 5 on after a delayed start of 5 minutes. When sensor 2 is high all sockets go off.
Thirdly on a maintenance command I want sockets 1 and 2 on, socket 3 on for 5 minutes and socket 6 on after a delayed start of 5 minutes. The maintenance command should run for a maximum of 15 minutes and turn all sockets off.
It would be best if my first and second items could be subject to a maximum run time too!
So, I know I can use PL to make the delayed starts on sockets 4, 5 and 6 and the pulse function to force socket 3 off after 5 minutes. I could wire sockets 1 and 2 together (I’d rather not, but they’ll always operate as one, so..).
But given there’s a lot of commonality there I’m struggling with how to create the necessary PL with the 8 gate limit - if I create a PL that says if the sensor is low turn on socket 1 I’ll soon run out of gates to also turn on sockets 2,3 and one of 4, 5 or 6 unless I’ve got things wrong!
I know I can nest the PL but am I misunderstanding how that works?
