SmaRT BU-xH8D Base Unit Family
U088.4.4-SmaRT_BU-xH8D
12
Appendix C: Typical Handheld to Base Unit Communication
Handheld remote and base unit communications are established at Cervis, Inc. before shipping
when systems are ordered. However, it may be necessary to establish or re-establish
communication between a remote and a base unit at some point. The Associate procedure is
used to do this.
A standard SmaRT System consists of one handheld remote and one base unit. Each base unit
can communicate with up to eight handheld remotes. Each handheld must first establish a
communications link with the base unit before the base unit will recognize the handheld unit.
This process is called
“Association.”
In some cases, it may become necessary to break the communication link between the
handheld and the BU-xH8D. This process is called
“Dissociation.”
Be aware that when a
handheld is dissociated from a base unit, all communication links to that particular base unit are
erased from the base unit memory!
For instance, a particular BU-xH8D is associated to
Handheld Remotes 1 through 5. Remote 2 dissociates
—breaks the communication link—from
the base unit. All five handheld remotes are removed from the base unit memory. The Associate
procedure must be used by any handheld that now needs to control that BU-xH8D.
The following Associate and Dissociate procedures are general methods of associating or
dissociating Cervis, Inc. handheld remotes to the BU-xH8D. Custom systems may have different
Association methods unique to the custom system design.
C1: BU-xH8D/PTO-DO-OO Remote Communication
To Associate
The base unit and handheld must be OFF before attempting to associate. Base unit and SmaRT
2-, 4-, and 6-button handheld association is established using the following steps:
1. Remove power from the base unit and turn off (PTO
– time out) the handheld
device.
2. Stand near the base unit in unobstructed, clear line-of-sight with the handheld in
hand.
3. Simultaneously press and hold the Associate (B1) and Dissociate (B2) buttons.
The RX and ER LEDs light.
4. Continue to hold both buttons until the TX and RX LEDs light steady.
5. When the TX and RX LEDs light, release buttons B1 and B2. The ER and BA
LEDs light.
Note: If the next button is not immediately pressed (in approximately 2 seconds), all LEDs
flash and the Associate procedure is aborted. You must restart the process to establish
the communication link.
6. Immediately press and hold the Associate button (B1). All LEDs light.
7. The TX LED begins to slowly blink. Continue to hold button B1.
8. Apply power to the base unit.
The handheld and base unit begin to establish a communication link while the Associate button
is held. Once the process is complete, all LEDs light briefly and then go out.
9. Release the Associate button. The SmaRT System is ready for use with that
particular handheld remote.
