
54
First pair of pins, J6 - Master
Second pair of pins, J16 - NC
Third pair of pins, J7 - Slave
Figure 5-4 Location of Jumpers J6, J16 and J7 on the Comm X PCB
Step 3: Setting the Modbus Address for Each Slave Device
A Modbus network containing slave devices requires a unique address for each slave.
This allows the master device to identify and communicate with each slave. The Modbus
network administrator must assign an unique Modbus address to each PV Powered
inverter.
To set the address:
A. Determine each slave address.
The addresses are represented using the hexadecimal representation of digits 0
through 9 and letters A through F. For example, slave 1 is set to 01, slave 10 is
set to 0A, and so forth. Refer to the following inverter address conversion Table
5-6 to select a unique address for each slave device by locating the number of the
slave device in the “Address” column. Move right to the “Switch” column to nd
the converted address value of this slave device.
Note: 0 is not an allowed address.
Address Switch Address Switch Address Switch Address Switch Address Switch
1 2 1 2 1 2 1 2 1 2
1 0 1 21 1 5 41 2 9 61 3 D 81 5 1
2 0 2 22 1 6 42 2 A 62 3 E 82 5 2
3 0 3 23 1 7 43 2 B 63 3 F 83 5 3
4 0 4 24 1 8 44 2 C 64 4 0 84 5 4
5 0 5 25 1 9 45 2 D 65 4 1 85 5 5
6 0 6 26 1 A 46 2 E 66 4 2 86 5 6
7 0 7 27 1 B 47 2 F 67 4 3 87 5 7
8 0 8 28 1 C 48 3 0 68 4 4 88 5 8
9 0 9 29 1 D 49 3 1 69 4 5 89 5 9
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