Delta Electronics VFD-VL manual Content, AC drive Parameters Command Write only, Address Function

Chapter 4 Parameters

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

AC drive

Parameters

Command Write only

Address		Function
	GG means parameter group, nn means parameter number,
GGnn	for example, the address of Pr 4-01 is 0401H. Referencing to
	chapter 5 for the function of each parameter. When reading
H
	parameter by command code 03H, only one parameter can
	be read at one time.
		0: No function
2000H	Bit 0-3	1: Stop
		2: Run
		3: Jog + Run
		00B: No function
	Bit 4-5	01B: FWD
		10B: REV
		11B: Change direction
		00B: 1st accel/decel
	Bit 6-7	01B: 2nd accel/decel
		10B: 3rd accel/decel
		11B: 4th accel/decel
	Bit 8-11	Represented 16 step speeds.

Revision Nov. 2008, VLE1, SW V1.03 4-93