User Manual EM735-Mod series
Document code: Fineco735-1-1.1 Revision2.001
Shanghai fangqiu electric CO.,LTD. Email:
reading purpose in close quarters.
The test pulse output is a polarity dependant, passive transistor output requiring an external
voltage source for correct operation. For this external voltage source, the voltage (Ui) should
be 5-27V DC, and the maximum input current (Imax) should be 27mA DC. To connect the
impulse output, connect 5-27V DC to connector 23 (anode), and the signal wire (S) to
connector 24 (cathode). The meter pulses is indicated on the front panel.
7.4 Communication port
Smart meter has equipped communication port, we can program the meter’s operation
data or reading via these 2 ports.(Pin21pin22) . RS485 communications transfer rates allow
selected at 1200bps, 2400bps, 4800 bps and 9600bps, default is 1200bps.The max quantity
of meters on one RS485 main bus is 64 Units, the longest communication distance is 1.2Km.
Protocol
Modbus RTU
Data format
8 data bit,Even,1 stop bit
Baud rate
1200(option),2400,4800,9600
Address range
1-256 User settable
Bus loading
64pcs
Cable
AWG18
8
Programming
By holding the keys “SET” pressed for at last 3 sec., starts menu programming
mode.LCD will show:
8.1 password verify
On the smart meter display will appear : PA followed by the currently memorized
value . “PA” means “Password”,”0000”means the 4 digits of the Password. we can use
press “Page Down” button to decrease the input value, and press “Page Up” to increase
the input value ,press the “SET” button to switch the input Password digits, when the
Password is correct, the meter will enter “program status” and display the “ID” program
interface.
Remarks:
Please remember well the Password, you can only reset the Password to default
(8888) by opening the meter and short connect the “CLEAR” on PCB boar
d.
8.2 ID setting
After the Password authentication , the meter will display the “ID XX” setup
interface. As the following picture ”Id 00” it means the current ID address is 00 (the ID
address is hex code)
