MODEL 13000 Application Guide
7
RF COMMUNICATION TEST
After RCN units have been linked to a Master and installed on
thermostat bases , a communication test should be run to ensure a
reliable communication path exists between each RCN and its
Master Transceiver.
Initiate a 5-second communication test with the Master transceiver
by pressing PB2 on the RCN under test. After the 5-second test
period a PASS/FAIL indication is given:
? Green LED (D5) flash = PASS
? Red LED (D4) flash = FAILED
Each model 130 wireless RS485/422 RCN can be operated with
or without mesh (message repeating) functions turned on. Factory
default is repeater OFF. With the repeater function off, the Master
Transceiver must be able to directly communicate with each of its
RCN’s. While the repeater function allows the system to over
come RF range limitations, unnecessary repeats adds traffic to the
network. A better use of the function is to selectively enable it.
Figure 3 is an example of using the repeater function selectively.
In this example case, a Master Transceiver directly communicates
with RCN 1, 2 and 3. RCN 4 and 5 however are out of range.
RCN 3 is the closet RCN to 4 and 5. Its repeater function is
enabled, forming the bridge between the Master and RCN units 4
and 5.
Master
Transceiver
8870
RCN #1
8870
RCN #2
8870
RCN #5
8870
RCN #4
8870
RCN #3
(Repeater on)
NI-700
Figure 3: Mesh Repeater Example
