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5.0 Additional Features
Status Updates
When an RF200D’s inputs change it automatically transmits an status update. This is
a normal procedure, but if the inputs do not change for a while the receiver does not
know if the transmitter is still functioning correctly. To overcome this the RF200D can be
programmed to transmit a status update at a given period.
Status updates have two main functions:
1. If a receiver becomes out of sync with the transmitter e.g. a power cut, receiving
automatic status updates will re-sync the receiver.
2. The receiver can also be programmed to detect missing status updates, if two or more
status updates are missing the receiver generates a tamper fault and the tamper LED
flashes twice to indicate a remote tamper fault.
To enable status updates please refer to the programming section.
Input Channels Analogue Updates
When an RF200D transmits a status update it measures the input voltages and
transmits this level as a digital value in 50mV steps. The purpose of this feature is
for remote data logging etc. and has no affect on the inputs previously described.
Repeat Function
An RF200D can repeat other RF200D’s signals. The repeating RF200D still can
use its own inputs and outputs while repeating other units. For an RF200D to
repeat another units data it physically has to receive the first transmission and
then re-transmit this on the same frequency. This is perfectly ok for status updates
but for the data channel if a high data throughput is required we cannot guarantee
its operation.
RF Channel Selection
Six RF channel channels are available in the 433-434MHz band. All RF200D
units must be on the same channel for them to communicate. If a particular
channel is found to be poor it is advisable to try another channel.
