Dear Sir,
I DON,T KNOW IF IT IS IN THE RIGHT
i will appreiate it if you can help me to do the following design using siemens S7-300.
Sewage System Control
Design sequence sewage system control
Make your design for the sewage lift station on the following sequence of operation:
? All pumps OFF at the low level.
? 1St pump ON at the second high level.
? 1St & 2nd pumps ON at the third high level.
? All pumps ON at the fourth high level.
? Alarm signals shall be sent to the local control panel (light and audio) and to the control room.
? When pumps are actuated they shell operate until the low level reached.
? If one of the pumps is shutdown or switch off next pump shall be automatically selected to operate
? The leading pump shall be alternated so that no pump shall have two successive starts.
