Application - Emerson EV1000-2S0004G User Manual

80 Appendix 2 Communication Protocol
0x004B,0xC18B,0x818A,0x404A,0x004E,0xC18E,0x818F,0x404F,0x018D,0xC04D,0x804C,0x418C,
0x0044,0xC184,0x8185,0x4045,0x0187,0xC047,0x8046,0x4186,0x0182,0xC042,0x8043,0x4183,
0x0041,0xC181,0x8180,0x4040}
If calculating the CRC Checksum of all the sent characters, it may take long time. It can nevertheless save the space occupied
by form. The routine for calculating CRC on line is as follows:
unsigned int crc_check (unsigned char *data,unsigned char length)
{
int i;
unsigned crc_result=0xffff;
while (length--)
{
crc_result^=*data++;
for (i=0;i<8;i++)
{
if (crc_result&0x01)
crc_result= (crc_result>>1) ^0xa001;
else
crc_result=crc_result>>1;
}
}
return (crc_result= ((crc_result&0xff) <<8) | (crc_result>>8) ) ;
}

7. Application

The command of starting 5# drive, running forward, 50.00Hz (write as 5000 in the command) :
Address
Request 0x05
Response 0x05
5# drive jog:
Request
Response
5# drive stop jog:
Request
Response
5# drive reset:
Request
Response
Read 5# drive current frequency, the reply is 50.00Hz:
Address
Request 0x05
Response 0x05
Modify 5# drive Acc time 1 (Parameter F0.10) to 10.0s, not save upon power-off.
Initial register
Function code
address
0x10 0x3200
0x10 0x3200
Address Parameter
0x05 0x06
0x05 0x06
Address Parameter
0x05 0x06
0x05 0x06
Address Parameter
0x05 0x06
0x05 0x06
Parameter
0x03
0x03
EV1000 Series General Purpose Variable Speed Drive User Manual
Quantity of Bytes of registers
registers content
0x0002 0x04
0x0002 none
Register Address
0x3200
0x3200
Register Address
0x3200
0x3200
Register Address
0x3200
0x3200
Register Register Qty or
Address bytes
0x3301 0x0001
None 0x02
Content of
registers
0x01C7,0x1388
none
Register Content Check sum
0x00D0
0x00D0
Register Content Check sum
0x00C0
0x00C0
Register Content Check sum
0x0180
0x0180
Register
Content
None
0x1388
Checksum
0x16A9
0x4EF4
0x876A
0x876A
0x86A6
0x86A6
0x86C6
0x86C6
Check sum
0xDB0A
0x44D2