Sunfar E300-2S0022(B) - Page 63

56 SUNFAR E300 SERIES
Demurral code means failure type:
Demurral code Corresponding failure
01 Invalid function code
02 Invalid data addr.
03 Data beyond limitation
04 Slave invalid operation
20 Read too much parameter
21 Read stored and hided parameter
22 Slave running prohibits modification data
23 Data modification by password protection
24 Read parameter failure
CRC checkout:
CRC checkout CRC low order CRC high order
Data length (Byte) 1 1
CRC checkout function as follow:
unsigned int crc_chk_value(unsigned char *data_value, unsigned char length)
{
unsigned int crc_value=0xFFFF;
int i;
while(length--)
{ crc_value^=*data_value++;
for(i=0;i<8;i++)
{ if(crc_value&0x0001)
crc_value=( crc_value>>1)^0xA001;
else
crc_value= crc_value>>1;
E300 Series Mini-type Integrated Universal Inverter Manual