Delta BLD-E1 brushless DC motor drive BLD-E1 Series User Manual download pdf (Page 129)

Chapter 4 ParametersAT |Troubleshooting}| BLD-E1 Series

4-88

Revision May 2009, 00DE, V0.50

Step 5: Repeat step 3 and 4 until eight shifts have been performed. When this is done, a

complete 8-bit byte will have been processed.

Step 6: Repeat step 2 to 5 for the next 8-bit byte of the command message. Continue doing

this until all bytes have been processed. The final contents of the CRC register are the CRC

value. When transmitting the CRC value in the message, the upper and lower bytes of the

CRC value must be swapped, i.e. the lower order byte will be transmitted first.

The following is an example of CRC generation using C language. The function takes two

arguments:

Unsigned char* data Å a pointer to the message buffer

Unsigned char length Å the quantity of bytes in the message buffer

The function returns the CRC value as a type of unsigned integer.

Unsigned int crc_chk(unsigned char* data, unsigned char length){

int j;

unsigned int reg_crc=0xFFFF;

while(length--){

reg_crc ^= *data++;

for(j=0;j<8;j++){

if(reg_crc & 0x01){ /* LSB(b0)=1 */

reg_crc=(reg_crc>>1) ^ 0xA001;

}else{

reg_crc=reg_crc >>1;

}

return reg_crc;

}

3.5 Address list

The contents of available addresses are shown as below:

Content Address Function

AC drive

Parameters

GGnnH

GG means parameter group, nn means parameter number,

for example, the address of Pr 4-01 is 0401H. Referencing to

chapter 5 for the function of each parameter. When reading

parameter by command code 03H, only one parameter can

be read at one time.

Command

Write only

2000H Bit 0-3

0: No function

1: Stop

2: Run

3: Jog + Run

1 2 ... 124 125 126 127 128 129 130 131 132 133 134 ... 185 186

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Delta BLD-E1 brushless DC motor drive BLD-E1 Series User Manual Page 129

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