Modbus parameters are held within registers. Each register contains 2 bytes of information. For simplification, the number of registers for storing numbers is 2 (4 bytes), while the number of registers for storing text information is 16 (32 bytes).
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The register numbers and corresponding system values can be found [[RUT955_Monitoring_via_Modbus#Get_Parameters|in this article]].
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{| class="wikitable"
{| class="wikitable"
|Setting relay (on) (Relay address is 202, which means 'Number of first register will be 203)
|Setting relay (on) (Relay address is 202, which means 'Number of first register will be 203)