Weidmuller WI-I/O-9-U2: Wireless Mesh I/O & Gateway User Manual V1.2.2 - Manual (Page 69)

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“Failsafe Blocks” above for a way of configuring a registers with a valid
value at start-up
4.3.12 Sensitivity Blocks
All registers have a configurable “Sensitivity” value, which determines how much the
register needs to change befo
re being sent as a “Change of State” (COS) message.
All registers have a default sensitivity value of 1 except the following.
The 12 analog inputs have a sensitivity of 1000 bits or approximately 3% (1000 bits
from a total range of
32768 = 3.05%) and the 24 floating point values will have a default
sensitivity of 0.5 units. In the case of inputs 38001 – 38004 this will be 0.5mA, inputs
38005-38012 will be in Volts and inputs 38013
– 38016 will be Hertz.
The reason for having a sensitivity value on the analog inputs is so the module does not
send every single bit change of an analog value and subsequently saturate the radio
channel with unwanted change of state messages.
If a lower sensitivity is required then the sensitivity block can be adjusted but care
should be taken to not reduce the sensitivity to the point where radio messages are so
frequent because of a sensitivity change it saturates the radio network.
It’s a fine line
adjusting the system parameters so that you receive up to date data but do not
overloading the radio communications.
A total of 50 Sensitivity Blocks can be configured for different registers or different
values.
Register Group
– Selects the register range.
First Register
– Selects the actual register number within the register group range.
Count
– Selects the number of consecutive registers to apply the sensitivity to.
Sensitivity – Selects the number of counts the register needs to change by before a
Change of State trigger occurs.
Figure 52 - Sensitivity Block