WattMaster WM-WCC3-TGD-01B - Manual (Page 554)

WCC III Technical Guide 12-58
12. WCC III INSTALLATION
Addressing the SAT3D
Figure 12-46: SAT 3D Address Switch location
The address dip switches are additive; that is to say placing switches
4 and 5 in the ON position will cause the SAT 3D controller to be
identifi ed as satellite controller number 24. The SAT 3D 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 3D controller that is presently “on-
line” will not change its address number. The switches need to
be placed in the proper position before powering up the SAT 3D
controller, or the SAT 3D must be powered down and then back up
for the SAT 3D 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.
There can be up to 59 SAT 3D controllers connected together on
a 2-wire communication loop. In order for the WCC III system to
communicate properly with each SAT 3D, each SAT 3D must be
assigned a separate address number. The number is assigned by
positioning the small address dipswitch on the front of the SAT 3D
in the proper position.
The SAT 3D uses up to 4 satellite addresses locations. The lowest
possible address is #4. The address must start in multiples of 4,
starting at address # 4, then the next available address is #8, then
next available address is #12, then next available address is #16,
then next available address is 20, then next available address is 24,
then next available address is 28, etc. The only legitimate SAT 3D
addresses are 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56,
60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120,
124, 128, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172,
176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224,
228, 232, and 236.
For example the following Satellite Addresses will not work as a
SAT 3D starting address: 1, 2, 3, 5, 6, 7, 9, 10, 11, 13, 14, 15, 17,
18, 19, 21, 22, 23, 25, 26, 27, 29, 30, 31, 33, 34, 35, 37, 38, 39, 41,
42, 43, 45, 46, 47, 49, 50, 51, 53, 54, 55, 57, 58, 59, 61, 62, 63, 65,
66, 67, 69, 70, 71,73, 74, 75, 77, 78, 79, 81, 82, 83, 85, 86, 87, 89,
90, 91, 93, 94, 95, 97, 98, 99, 101, 102, 103, 105, 106, 107, 109,
110, 111, 113, 114, 115, 117, 118, 119, 121, 122, 123, 125, 126,
127, 129, 130, 131, 133, 134, 135, 137, 138, 139, 141, 142, 143,
145, 146, 147, 149, 150, 151, 153, 154, 155, 157, 158, 159, 161,
162, 163, 165, 166, 167, 169, 170, 171, 173, 174, 175, 177, 178,
179, 181, 182, 183, 185, 186, 187, 189, 190, 191, 193, 194, 195,
197, 198, 199, 201, 202, 203, 205, 206, 207, 209, 210, 211, 213,
214, 215, 217, 218, 219, 221, 222, 223, 225, 226, 227, 229, 230,
231, 233, 234, 235, 237, 238, 239, and 240.
Care must be taken to ensure that two SAT 3D controllers do not
have the same address. When this condition is present, the central
computer (WCC III – MCD) does not know where to send the
information, and the information which should be sent to the SAT
3D controller is then usually lost.
You should be aware of the symptoms that are 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 3D controllers are named number #8. When you call up
satellite controller #8 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.
Another situation which you might encounter is adding a SAT 3D
controller to an existing system and accidentally giving it the same
number as a SAT 3D presently “on-line.” Again, when you begin
to program the new SAT 3D controller, everything will appear fi ne
until you leave a screen or if you go to a summary screen. Only
now, all of the data is usually not missing. Generally, you get parts
of your data back and parts will be missing.
If you suspect you might have two SAT 3D controllers with the
same address, number 8 for example, the best thing to do is go to
the SAT 3D controller that you know is number 8, and remove the
2-wire RS-485 communication loop from it. Then go back to the
computer and call up satellite controller #8. If the computer can
still “talk” to satellite controller #8, then there is another satellite
controller that is addressed #8 connected somewhere on the RS-
485 communication loop.
SAT 3D Addressing