42
2.. Set.the.switch.address.on.each.slave.device.
The slave address for each PV Powered inverter is set using two rotary switches.
Each switch is hexadecimal, containing 0 through 9, followed by A through F. Set
the switches using the following guideline:
•. The.first.switch.is.always.set.to.the.value.in.the.“1”.column.below.the.“Switch”.
heading
•. The.second.switch.is.always.set.to.the.value.in.the.“2”.column.below.the.
“Switch”.heading
For example, if you are setting the address of the first slave device, inverter 1 of
your network, to the hexadecimal address 05, the first switch is set to 0, the first
digit of the hexadecimal address, and the second switch is set to 5, the second
digit of the address.
Switch 1
Switch 2
Figure 5-5 Rotary Switches for Setting the Inverter Number
The switches are located near the center of the Comm X PCB and are labeled SW1 and
SW2 as they appear in Figure 5-5.
If you need more device addresses than the 100 listed in the above table, refer to a
complete digital to hexadecimal conversion table.
Note: Some modbus master devices do not allow addresses above the decimal value of
126. PV Powered recommends keeping the number of slave devices between 2
and 100.
B. Network Configuration Process
1. Setting the Communication Parameters
The RS-485 modbus master communication settings need to be set to the values
in Table 5-2. This allows your modbus master device to communicate with the
inverter. Follow the instructions in the manual for your master device to complete
these settings.
Parameter
Setting
Baud
9600
Parity
N
Data bits
8
Stop bit
1
Flow control
None
Table 5-2 Communications Settings
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