WattMaster WCC II - Manual (Page 215)

Section 5: Installation Guide
WCC II Operator’s Guide
Operator Interfaces 5-13
Addressing (Numbering) SAT II
Controllers
The ECC/WCC II system can have up to 240 SAT II controllers.
In order for the central computer to communicate properly with
each individual SAT II controller, each controller must be assigned
a separate number, or address. The number is assigned by placing
the small toggle switches on the front of the SAT II controller
marked “SAT NUMBER” in the proper position.
The toggle switches are additive; that is to say placing switches
1 and 2 in the ON position will cause the SAT II controller to be
identifi ed as satellite controller number 3. The SAT II controller
looks at the position of these switches only when it is going through
its initialization process after being powered up. Simply changing
the switch positions on a SAT II controller which is presently “on-
line” will not change its number. The switches need to be placed in
the proper position before powering up the SAT II controller, or the
SAT II must be powered down and then back up for the SAT II to
“read” the new position of the switches. When placing the switches
in the desired position, make sure the switch has “clicked” into
place and is properly seated.
Care must be taken to insure that two SAT II controllers do not
have the same address. When this condition is present, the central
computer does not know where to send the information, and the
information which should be sent to the SAT II controller is usually
lost.
You should be aware of the symptoms caused by two satellite
controllers having the same number. Let’s consider a new job
in which the satellite controllers have not yet been programmed
and 2 SAT II controllers are named number #3. When you call up
satellite controller #3 to enter data, everything will appear to be
fi ne. You will be able to enter data on the screens as if nothing is
wrong. However, when you leave a screen and then return to the
same screen, all of the data you entered will be missing. Also, if
you fi nish programming the analog inputs for example, and then
go to the analog input summary screen to review your inputs, all of
the data you have entered will be missing.