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8. Communication and Monitoring
8.1 Communication Interface
inverters have communication interface RS485 and /or RS232 depending on model. Output voltage,
current, frequency, fault information, etc., can be delivered to a PC or other monitoring equipment via
the RS485/RS232.
8.2 Communication types
inverters come with one or both of the following types communication facility
depending on model.
①
RS232 Communication
RS232 is a standard communication interface within a distance of 12m. It transmits data between PC
and one series inverter (Figure 22).
Figure 22
RS232 Communication Diagram
Figure 23
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
Only one inverter can be connected with a PC at one time through RS232 port. This facility is
generally used for single inverter communication, software update and testing by service person.
②
RS485 Communication
RS485 allows upto 32 inverters to communicate at the same time by one cable, but the cable length
should not be more than 1200m. In order to monitor multiple inverters at the same time, users need to
install a monitor system Tress Browser in the PC to browser the PV plants operating data. Tress
Browser doesn’t need PC software, pls check the manual of Tress Browser details. Connecting the
system as blow (figure 24), user can easily monitoring the PV power station.