hi estebangast,

the simultaneator is easy. just switch the pumps on when a level is reached.

For LL pump1, for L1 pump2, etc.

The level sensors don´t switch off when they reach a higher level, or do they?

I guess your alternator should guarantee an even load on the pumps, right?

For this pupose I would count the pumps runtime and always switch the pump with the lowest runtime on. Maybe you can also do this in the other way and everytime a pump needs to switched off, you switch the pump with the highest runtime.

there is a block in the Library for basic processes that should match this requirement:

Library of Basic Processes (LBP) for TIA Portal V17 (STEP 7 Basic / Professional, WinCC Comfort / Professional, WinCC Runtime Advanced / Professional), WinCC V7.5 SP2 and WinCC Open Architecture 3.18 with documentation, libraries and demo projects

 have a look the block "LBP_Aggr8–Control of up to 8 Aggregates":

documentation of "LBP_Aggr8–Control of up to 8 Aggregates"

The block manages theautomatic on/off and switching over of up to eight
Aggregates.
The following modes are possible:
•Sequential switching according to priority
–Switching on: The released Aggregate with the highest priority
–Switching off: The Aggregate in operation with the lowest priority
Priority-controlled actuation is active as soon as different priorities are
parameterized.
•Changeover taking into account the operating hours
–Switching on: The released Aggregate with the shortest total runtime
–Switching off: The Aggregate inoperation with the longest total running time
This operating mode is active if the input “parSwitchByTime” is TRUE and only
applies for the Aggregates that have the same priority.
•Changeover taking into account the cycle times
–Switching on: Thereleased Aggregate with the shortest last cycle time
–Switching off: The Aggregate in operation with the longest current cycle time

 hope this helps,

regards,