The Demand Time (Address 1) is used to reset the demand period. A value of zero must be
written to this register to accomplish this. Writing any other value will cause an error to be
returned. Any valid value sent to this register will automatically reset the Maximum Demand
register.
The value written to addresses 2 must be one of the following 8,15, 20 or 30, otherwise an error
will be returned.
Address 3 must always be set to 1.
The addresses 4, 5 and 6 are read only. The System type address will display either 2 or 3. 2 = 3
Phase 3 Wire, 3 = 3 Phase 4 Wire.
Address 7, Relay Pulse Width, values of 3,5 or 10 can only be written to this register. Writing any
other value will cause an error to be returned. 3 = 60 ms, 5=100 ms, 10=200 ms.
Address 8 is used to reset the Energy readings. A value of zero must be written to this register
to accomplish this. Writing any other value will cause an error to be returned.
Addresses 9 & 10 are used by the display unit and cannot be accessed remotely.
Address 11 is the Node Address for the instrument. Any value between 1 and 247 can be set.
Address 12, values of 1,10 or 100 should only be entered, writing any other value will cause an
error to be returned.
Addresses 13 - 18 are used by the display unit and cannot be accessed remotely.
Address 19 is read only and displays the System Power.
Address 21 is used to determine the word order for the floating point number representation.
Sending the value 2141 as a floating point number in the word order required will result in
all subsequent Modbus transactions adopting the word order that “2141” was written to
address 21.
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