Delta ME300 Series - Page 339

Chapter 12 Description of Parameter Settings
ME300
12.1-09-8
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; // return register CRC
}
4. Address list
AC motor drive parameters
Modbus address Function
GGnnH
GG is the parameter group, nn is the parameter number; for example,
the address of Pr.04-10 is 040AH.
Control command (20xx)
Modbus address R/W Function
2000H RW
bit 1–0
00B: No function
01B: Stop
10B: Run
11B: JOG + RUN
bit 3–2 Reserved
bit 5–4
00B: No function
01B: FWD
10B: REV
11B: Change direction
bit 7–6
00B: 1
st
acceleration / deceleration
01B: 2
nd
acceleration / deceleration
10B: 3
rd
acceleration / deceleration
11B: 4
th
acceleration / deceleration
bit 11–8
000B: Master speed
0001B: 1
st
Step speed frequency
2000H RW bit 11–8 0010B: 2
nd
Step speed frequency