NOTES_sendbms_sma_can_msgs

BMS CAN Messages sent to inverter

Data extracted from: http://www.rec-bms.com/datasheet/UserManual9R_SMA.pdf

CAN messages are sent each measuring cycle with 100 ms interval between. 

CAN message 0x351:
Byte  Description                     Type              Property
1     Charge voltage low byte         Unsigned integer  LSB = 0.1V
2     Charge voltage high byte
3     Max charging current low byte   Signed integer    LSB = 0.1A
4     Max charging current high byte
5     Max charging current low byte   Signed integer    LSB = 0.1A
6     Max charging current high byte
7     Discharge voltage low byte      Unsigned integer  LSB = 0.1V
8     Discharge voltage high byte

CAN message 0x355:
Byte  Description                     Type              Property
1     SOC low byte                    Unsigned integer  LSB = 1%
2     SOC high byte
3     SOH  low byte                   Unsigned integer  LSB = 1%
4     SOH high byte
5     SOC high definition low byte    Unsigned integer  LSB = 0.01%
6     SOC high definition high byte

CAN message 0x356:
Byte  Description                     Type              Property
1     Battery voltage low byte        Signed integer    LSB = 0.01V
2     Battery voltage high byte
3     Battery current  low byte       Signed integer    LSB = 0.1A
4     Battery current  high byte
5     Battery temperature  low byte   Signed integer    LSB = 0.1°C
6     Battery temperature high byte

CAN message 0x35A:
Byte  Description      Type              Property
1     Alarm byte 1     Unsigned char     Bit orientated Alarm structure
2     Alarm byte 2     Unsigned char
3     Alarm byte 3     Unsigned char
4     Alarm byte 4     Unsigned char
5     Warning byte 1   Unsigned char     Bit orientated Warning structure
6     Warning byte 2   Unsigned char
7     Warning byte 3   Unsigned char
8     Warning byte 4   Unsigned char 

CAN message 0x35E:
Byte  Description     Type              Property
1     Byte 1          ASCII             BMS OEM description: ABCDEFG 
2     Byte 2          ASCII
3     Byte 3          ASCII
4     Byte 4          ASCII
5     Byte 5          ASCII
6     Byte 6          ASCII
7     Byte 7          ASCII
8     Byte 8          ASCII

CAN message 0x35F:
Byte  Description                 Type                Property
1     Cell chemistry low byte     Unsigned integer
2     Cell chemistry high byte
3     Hardware version low byte   Byte
4     Hardware version high byte  Byte
5     Capacity low byte           Unsigned integer    LSB = 1 Ah
6     Capacity high byte
7     Software version low byte   Byte                Version: 01
8     Software version high byte  Byte