F&F LE-03MP, Руководство пользователя

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The meter has an internal relay that switches L1, L2 and L3 cir-
cuits. The (ON/OFF) relay can be also operated manually.
The meter has a program overcurrent protection. If the load
threshold is exceeded, the internal relay opens for 5 minutes.
After that time the relay closes and the measurement is repe-
ated.
Prepaid power (prepayment feature) is the set increment value
of available active power beyond which the internal relay is di-
sconnected by the meter.
Automatic operation is the mode with two active functions: au-
tomatic relay disconnection if the set overcurrent threshold is
exceeded and switching on the prepaid mode.
Current state of relay (ON/OFF) is indicated on the LCD display as
the corresponding Modbus register value.
Readout of all measured values and parameter setting functions
is done via the Modbus RTU protocol.
Communication with the meter working as a Slave is performed
in accordance with Modbus RTU standard via RS-485 serial port.
Converted registers values give results consistent with the indi-
cations on the meter display.
Each indicator is identified by a unique address assigned by the
user.
IrDA (infrared data transmission ) feature is inactive in the
current version of the software.