Delta Electronics VFD-VE Series manual Jog + Run, 00B No function

Chapter 4 Parameters

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
		GG means parameter group, nn means parameter number,
AC drive		for example, the address of Pr 4-01 is 0401H. Referencing to
	GGnnH	chapter 5 for the function of each parameter. When reading
Parameters
		parameter by command code 03H, only one parameter can
		be read at one time.
			0: No function
Command	2000H	Bit 0-3	1: Stop
Write only			2: Run
			3: Jog + Run
			00B: No function
		Bit 4-5	01B: FWD
			10B: REV
			11B: Change direction
Command	2000H		00B: 1st accel/decel
Write only		Bit 6-7	01B: 2nd accel/decel
			10B: 3rd accel/decel
			11B: 4th accel/decel
		Bit 8-11	Represented 16 step speeds.
			0: No comm. multi step speed or accel/decel
		Bit 12	time
			1: Comm. multi step speed or accel/decel time
		Bit 13~14	00B: No function
			01B: operated by digital keypad
			02B: operated by Pr.00-21 setting
			03B: change operation source
		Bit 15	Reserved
	2001H	Frequency	command

4-144 Revision August 2008, 03VE, SW V2.04