13
The meter needs shielded twisted pair conductors to connect. Customers should consider the
whole network’s parameters such like communication wire’s length, the direction, communication
transformer and network cover range, etc.
注：
在布线工程上要严格按要求施工；
对于暂时不需要通信的仪表都要将他们连接到 RS-485 网络上，以便于诊断和测试；
进行 RS-485 电缆连接时，尽量使用双色双绞线，所有的 485 通信口“A”端接同一种颜色，
“B”端接另一种颜色。
RS-485 总线(从上位机通信口开始到任一被连接的仪表终端通信口)长不超过 1200 米。
Note:
Wiring should follow the wiring requirements;
Connect all the meter in the RS485 net work even some do not need to communication, which is
benefit for error checking and testing;
Use two color wires in connecting wires and all the A port use the same color.
No longer than 1200 meters of RS485 bus line.
9.1 地址表 Address table
仪表支持 MODBUS-RTU 协议中的 03H 命令与 10H 命令，03H 为读多个寄存器，10H
为写多个寄存器，协议数据格式请自行查询。下表为仪表的寄存器地址表：
MODBUS-RTU protocol has 03H and 10H command to read and write registers respectively.
The following chart is registers’ address list:
当前总有功电能
Current total electricity
当前总有功尖电能
Current spike electric energy
当前总有功峰电能
Current peak electric energy
当前总有功平电能
Current flat electric energy
当前总有功谷电能
Current valley electric energy
当前正向总有功电能
Current forward active total
electric energy
当前正向有功尖电能
Current forward active spike
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