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5 Communication
Meter is defaulted to be equipped with one RS-485 communication
adopting Modbus-RTU protocol. Other communication modes such as
Profibus-DP, GPRS, Ethernet and WIFI can be realized by connecting module
to meter. As for detailed information, please refer to user manual of
communication modules DM10, DM11, DM12 and DM13.
6 Maintenance And Troubleshooting
Communication
First ensure the communication settings of meter, such as, slave address,
baud rate, check mode, etc. are in compliance with that of host equipment. In
case more than one meters does not send back the data, please check if the
connection of communication bus on site is correct, and if the RS485
converter is running regularly.
The data being display is not what you expert
Verify appropriate voltage and current are offered to the meter, and you can
use a multimeter to measure the voltage signal. What’s more, when
necessary, the clamp ammeter can be used to measure the current signal.
Verify the connection of signal wiring is appropriate, for example, the
homonymous ends of current signal and phase sequence of each phase
should be correct. The meter can display the value of active power, signal of
which is negative only in case of generating electricity, while in regular
situation, positive. However, the wrong connection of input or output wires, or
wrong connection of phase sequence may lead to irregular display of power
value. This series of meters permit modifying the directions of homonymous
ends of current, and you can set up reverse current in setting menu.
The electric quantity displayed by the meter is primary grid value, and it will
be incorrect if the multiple rate of PT or CT set in the meter is different from
that of PT or CT used practically. Besides, the measuring range of voltage
and current inside the meter and wiring grid should be adjusted according to
practical wiring mode on site, to keep right display of parameters.
Energy is inaccurate
The energy is accumulated based on the measurement of power. First
observe whether the power value of meter is in compliance with practical load.
The meter supports bi-direction energy metering. In case the wiring mode is
