Westermo RM-505U-2-E - Manual (Page 12)

505U Radio Telemetry Module
Page 12 © September 2002
When the 505U takes a measurement, it will transmit the analogue value if the value has changed by
more than the pre-configured sensitivity since the last transmission. The sensitivity can be
configured from 0.25% to 100% (0.05mA to 20mA) with a default value of 3% (0.6mA). If the
change in the signal since the last transmitted value is less than the sensitivity, then the 505U will not
transmit the analogue value.
In addition, an update transmission of the analogue value will be transmitted if the analogue value has
not been transmitted for the update time (10 seconds - 5 days). If an update time of zero is
selected, then no update messages will be sent.
If the update time expires since the last transmission, then the last measured value will be transmitted
- that is, a new measurement will not be taken. Normally the update time will be much longer than
the sample time. If the update time is less than the sample time, then update messages may transmit
the same value as the previous transmission, as a new measurement has not yet been taken.
Overview:
•
Measurements of the analogue signal are determined by the sample time and warm-up time
•
Analogue value is transmitted if the measured value has increased by the configured sensitivity
amount since the last transmission
•
Analogue value is transmitted if the input value has not been transmitted within the update time
(10 seconds - 5 days)