Installation guide

1BHFt%3*45&&.7BQPSMPHJD 3 Installation and Operation Manual
Tank wear leveling
The master controller monitors tank wear and assigns steam
production to tanks to equalize wear as much as possible within the
multi-tank group. The Vapor-logic
3 controller calculates tank wear
by dividing the amount of steam produced by the internal surface
area of each tank.
Fault tolerance
All tanks in a multi-tank group periodically send a status message
to all other tanks in the multi-tank group. If this message is not
received by the other tanks within a defined time period, the tank
is assumed to be unavailable to the remaining tanks in the group.
If the newly unavailable tank was acting as a slave (whether it was
masterable or not), it will be taken off the list of available tanks and
the system will respond appropriately. If the tank was the acting
master controller and there are other masterable controllers in the
system, the masterable controller with an assigned name (a letter of
the alphabet from “A” through “P”) closest to the letter “A” will claim
master status. If there are no remaining masterable tanks in the
system, the remaining slaves will continue to run for a short time at
the level they were last told to run, and then quit.
Multiple tank configurations:
8FBSMFWFMJOHGBVMUUPMFSBODF
Important:
Information on this page applies to
Vapor-logic
3 firmware versions 5.x.x
and 7.x.x only (systems with multi-tank
capability).
VL3_IOM.pdf 48 11/19/2009 9:11:14 AM