30
Communication and Monitoring
Figure 22
RS232 Communication Cable and Interface
Table 6
RS232 Pin Definition
Pin
1
2
3
4
5
6
7
8
9
Function
NC
TxD
RxD
NC
Common (GND)
NC
NC
NC
NC
2
RS485 Communication (Several inverters)
●
Communication
Figure 23
RS485 Interface of SR Series Inverter
One inverter can only be communicated with one PC at the same time through RS232 port.
Thus this method is generally used for single inverter’s communication, for examples,software
updating and serviceman’s testing.
RS485 is generally for multi inverters’ communication. Up to 32 inverters could communicate at
the same time, but wire length should be ≤1200m. System monitor SolarPower Manager should
be configured to realize one PC communicates with multi inverters at the same time. Through
PC SolarPower Manager could get real time PV plants operating data. Please see Installation
Guide of SolarPower Manager for more information.
PIN 1