Have a look for an explanation here in this thread:
https://forum.aquariumcomputer.com/showthread.php?12356-Programming-Vortech-pumps&p=75540#post75540
Type: Posts; User: MatthiasF
Have a look for an explanation here in this thread:
https://forum.aquariumcomputer.com/showthread.php?12356-Programming-Vortech-pumps&p=75540#post75540