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7/07
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93-900-831 REV: B
Linking Multiple Preset SBCs
Note: Each enclosure supports 32 Preset SBCs (or a total of 32 XNNet compatible
devices, such as remote control panels and status displays).
Preset SBCs can be linked together in a daisy chain to create multiple control points
for a single system. XNNet link cables can be attached to either Comm Link. The
total distance of the cable runs cannot exceed 1,000 ft. (304.8 m).
To link Preset SBCs:
1. Connect the first Preset SBC to the router using one of the Comm Links
(P4 or P5; see Steps 9 through 11 previous page).
2. Attach an XNNet link cable to the Preset SBC’s other Comm Link, following the
same procedure used when connecting to the router.
3. Attach the other end of the XNNet cable to a Comm Link on the second Preset
SBC.
4. Repeat Steps 2 and 3 for any additional Preset SBCs.
5. If required* terminate the final SBC. Loosen the two outer screws, insert a 120
ohm resistor (customer supplied) in the outer contacts, and tighten the screws
(FIG 4).
*On large control networks, termination may be required on the last linked
Preset SBC.
Operation
Apply power to the Preset SBC and the system (see router's documentation for
powering up procedure).
Programming & Entering Presets
Note: Preset SBCs cannot be programmed to act as a standard channel selector
device to a specific output.
To program presets:
Local presets must be pre-programmed in XNConnect and executed on a single
virtual matrix. For instructions on programming local presets see the XNConnect
Help file.
Global presets can either be defined using BCS commands or from a control panel (if
supported by the panel) and affect routing on all virtual matrices. For instructions on
programming global presets, see the BCS commands documentation.
Entering Presets
Important: Accessing local presets may require changing the current virtual matrix
(VM); accessing global presets requires a virtual matrix setting of “99” or “999”.
To enter local or global presets:
Note: The following steps apply if the virtual matrix setting needs to be changed to
access programmed presets.
1. To determine the SBC's current VM, hold down the 0 key for five seconds until
the screen flares (e.g., characters briefly brighten, then repetitively dim to
normal; display never goes blank); then release key.
VM number displayed
– indicates the SBC is currently set on a VM for
executing local presets (on a single virtual matrix).
“99” or “999” displayed
– indicates the SBC is currently set for executing
global presets (which can include multiple virtual matrices).
2. Local preset
– if the VM number displayed is correct, enter the preset number.
If the VM number displayed is not correct, enter the number of the VM (e.g.,
enter “01” or “001” for VM 1). Wait until the display stops flashing (approx. five
seconds), then enter the local preset number. If the display is “99” or “999”, the
VM setting must be changed to execute a local preset (see Step 3).
Global preset
– if the display is “99” or “999” wait until the display stops flashing
(approx. five seconds), then enter the global preset number. If the display is a
VM number, the VM setting must be changed to execute a global preset (see
Step 3).
3. Change the VM setting from local to global
by entering “99” or “999”. Wait until
the display stops flashing (approx. five seconds), then enter the global preset
number.
Change the VM setting from global to local
by entering the number of the VM
(e.g., enter “01” or “001” for VM 1). Wait until the display stops flashing
(approx. five seconds), then enter the local preset number.
Executing Switches & LED Display
When the system is powered up, the LED on the SBC Preset flashes for two seconds
and then displays the current virtual matrix number or displays “99” or “999” if it is
ready for a global preset.
The scrolling ranges for global presets are 1 to 64. For local presets, the scrolling
ranges are 1 to 99 on a 2-digit display, and 1 to 999 on a 3-digit display. If you select
an invalid local preset number (e.g., a number for which a local preset had not been
defined), the Preset SBC will display error code E2.
To operate the 2-digit Preset SBC:
Press the keys according to their function as indicated.
Enter a two digit number (e.g., for preset # 4, enter “04”).
Within two seconds of pressing the first digit, press the
second one.
Enter “00” to clear the display.
To operate the 3-digit Preset SBC:
Press the keys according to their function as indicated.
Enter a three digit number (e.g., for preset # 15, enter “015”)
Within two seconds of pressing the first digit, press the
second digit; within another two seconds, press the third
digit.
Enter “000” to clear the display.
Error Codes / Troubleshooting
Cleaning
Preset SBCs require only topical cleaning. Use a dry cloth and mild glass cleaner to
clean the surface of the Preset SBC. Do not use abrasive cleaners to clean the
faceplate.
FIG. 4
Linking Preset SBCs in a daisy-chain
2-digit SBCs linked
3-digit SBCs linked
Termination may be
required (see Step 5)
Keys Function
Number Allows direct switching to a different preset
selection without scrolling
+ Increases preset selection by one
- Decreases preset selection by one
Keys Function
Number Allows direct switching to a different preset
selection without scrolling
+ Increases preset selection by one
- Decreases preset selection by one
Code
Causes Actions
E1
Request
Timed Out
Control Overrun – commands sent too
quickly.
Problem with physical connection to system
Re-enter commands
Check cable connections
Check preset number
setting for the Preset SBC
E2
Virtual
Matrix Error
Configuration problem Ensure preset number is
valid and on the correct
virtual matrix
E3
Display
Error
The preset is valid, but cannot be displayed
because it is higher than 99 on a
2-digit display, or 999 on a 3-digit display
Enter valid preset
number
E4
Fragmented
A breakaway switch was made causing
status mismatch between one or more
components in a grouping
Check status on different
levels using another
control method to find
status mismatch; reroute
switch