14
5.5 Communication setting
E.g. To set communication address as 2, set baud rate as 9600bps, set data format as odd check, the operation
process is as follows,
Enter programming interface,
select communication setting menu
M e n u
Menu
>3s
M e n u
Set meter address as 2
Set baud rate as 9600bps
Set communication data format as O.8.1 odd check
Save modified data
and exit programming mode
6.
Common problems and troubleshooting
About communication
Meter does not send data back
First make sure the communication setting information of the meter such as address, baud rate and check mode
corresponds to the requirements of host computer. If several meters at field do not send data back, please check whether
the communication bus at field is connected correctly and whether RS485 converter works normally.
If there is only one meter or a few meters communicate abnormally, related communication bus is also needed to be
checked. You may check whether there is an error in the host computer by exchanging the subordinate machine
addresses of normal meter and abnormal meter. Besides you may check whether there is a fault in the meter by
exchanging the installation positions of normal and abnormal meters.
Data sent back by the meter is incorrect
Communication data which is opened to users includes primary grid “float” type data and secondary grid “int/long”
type data. Please read the instruction for data storage address and format in communication address table carefully, and
make sure to transmit data according to relative format.
It is suggested to download testing software ModScan32 for Modbus-RTU communication protocol. This software
adopts standard MODBUS-RTU protocol which can display data in the formats such as integer, float and hexadecimal, so
that you can compare the data with measured data displayed on the meter directly.
Communication indication sign information
There is a communication sign on the display screen. It will flash when receiving data in communication test process.
Incorrect measurements
Make sure that the meter has been input right voltage and current. The multimeter is used for measuring voltage and
current, and the clip-on meter is used for measuring current signal.
