MPP Solar RS485 - 3-4. Lithium Battery Communication Configuration

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BMS RS-485 Card/Box Quick Guide
V.1.3
3-4. Lithium battery communication configuration
1. ADD Switch: There are 4 ADD switches are to define different baud rate and battery group
address. If switch position is turned to bottom for “OFF” position, it means “0”. If switch
position is turned to upper for “ON” position, it means “1”.
 Dip 1 is “ON” to represent the baud rate 9600.
 Dip 2, 3 and 4 are to set up battery group address.
Dip switch 2, 3 and 4 on master battery (first battery) are to set up or change the group
address.
NOTE: “1” is upper position and “0” is bottom position.
Dip 1
Dip 2
Dip 3
Dip 4
Group address
1: RS485
baud rate=9600
Restart to take
effect
0
0
0
Single group only. It’s necessary to set up master
battery with this setting and slave batteries are
unrestricted.
1
0
0
Two-group condition. It’s necessary to set up
master battery on the first group with this setting
and slave batteries are unrestricted.
0
1
0
Two-group condition. It’s necessary to set up
master battery on the second group with this
setting and slave batteries are unrestricted.
NOTE: The maximum groups of lithium battery is 2 and for maximum number for each group,
please check with battery manufacturer.