Change Sensitivity & I/O Value Scaling; Change Sensitivity - Weidmuller WI-GTWY-9 User Manual

WI-GTWY-9-xxx Wireless Gateway
4.6 Change Sensitivity & I/O Value Scaling

4.6.1 Change Sensitivity

"Change" messages for both individual I/O mappings and block mappings use a sensitivity value
to trigger the message. Sensitivities are configured for blocks of I/O registers - that is, each I/O
register does not have a unique sensitivity. You can configure up to 50 sensitivity values - that
is, there can be 50 blocks of registers with different sensitivities.
In the above example, three sensitivity blocks have been configured:
1. I/O registers 0 – 49 have a sensitivity of 1000 (or 1.5% of the 16 bit range)
2. I/O registers 100 – 499 have a sensitivity of 250 (or 0.4% of the 16 bit range)
3. I/O registers 1000 – 2999 have a sensitivity of 100 (or 0.15% of the 16 bit range)
All of the registers between 0 and 49 have a sensitivity value of 1000. If register 34 has changed
value by more than 1000 since the last transmission for that register, then a change trigger will
occur for register 34. Sensitivity values are in decimal and can vary between 1 and 65535 (16-
bit).
Up to 50 blocks of sensitivities can be configured. If a register is included in more than one
block, then the first sensitivity value configured will be accepted and later values ignored. If
Scaling is configured (refer next section), then the number of blocks is reduced to 25.
Registers which are not included in any block use the "default" sensitivity which is also user-
configurable. In the above example, the default sensitivity is 1 and is the sensitivity for all I/O
registers not included in the three blocks.
Important Note. Sensitivity values need to be selected carefully for analogue or counting
registers as small values can result in a large number of change messages, which can overload the
Enable scaling
V1.18
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