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The Gateway device also displays the Site Survey results on the LCD. For one transmit and receive interval, the Gateway
saves the lowest signal strength. The LCD and Modbus registers contain the results of the last 100 samples. The totals are
a running tally of the last 100 samples and are continuously updated. Four categories are displayed:
G (green) = excellent signal strength
Y (yellow) = good signal strength
R (red) = poor signal strength
M = Missed packet
To disable Site Survey, send a control code of 32 (0x20) and a Node number of 0 (0x0).
3.7.4 Site Survey Data Holding
With Site Survey active, registers I/O 7 and 8 are Site Survey data holding registers that store the accumulated Site
Survey results. Error collections in holding register 8 are saved when Site Survey runs and restored after Site Survey is
disabled.
Register
[15:8] [7:0]
I/O 7 Red Total Missed Total
I/O 8 Green Total Yellow Total
Example Results
[15:8] [7:0]
I/O 7 10 0
I/O 8 80 10
Note: This is the current register arrangement when using Modbus/TCP or Modbus RTU. In some older models, the
Modbus/TCP registers are reversed (missed and yellow totals are in [8:15], red and green totals are in [0:7]).
SureCross Wireless I/O Networks
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