V&T E5 Series, User Manual

Page: 152 / 157

E5 Series High Performance Universal Inverter User’s Manual
Appendix A Modbus Communication Protocol 139

Register for parameter attributes
Register
address
Meaning Range
Read (R) and
Write (W)
0xF080 Relative address of the parameter See Appendix Table−T RTW
0xF08T Current value 0 ~ 65535 RTW
0xF08T Upper limit 0 ~ 65535 R
0xF083 Lower limit 0 ~ 65535 R
0xF084 Factory setting 0 ~ 65535 R
Write the parameter address into 0xF080 by reading and writing multiple register command 0xT7 firstly and
then read attributes of the parameter.
6. CRCT6 Function
unsigned int crcT6(unsigned char *data, unsigned char length)
{
int i,crc_result=0xffff;
while(length−−) {
crc_result^=*data++;
for(i=0; i<8; i++) {
if(crc_result&0x0T)
crc_result=(crc_result>>T) ^0xa00T;
else
crc_result=crc_result>>T;
}
}
return (crc_result=((crc_result&0xff) <<8) |(crc_result>>8) ) ;
}
7. Modbus Communication Exemplified
Start the T# inverter to run forward and set the frequency to 50.00Hz (indicating 5,000 internally)
Address
Function
code
Register start
address
Number Bytes
Register
contents
Check sum
Request 0x0T 0xT0 0x8000 0x000T 0x04 0x000T,0xT388 0xCEFF
Response 0x0T 0xT0 0x8000 0x0004 None None 0xE80A
Read the T# inverter running frequency of and the response running frequency is 50.00Hz
Address
Function
code
Register start
address
Number
Register
contents
Check sum
Request 0x0T 0x03 0x8T36 0x000T None 0x4C38
Response 0x0T 0x03 None 0x0T 0xT388 0xB5TT
Stop the T# inverter in default mode
Address
Function
code
Register
Address
Register Contents Check Sum
Request 0x0T 0x06 0x8000 0x0000 0xA00A
Response 0x0T 0x06 0x8000 0x0000 0xA00A

Note:
It needs to set P0.06 to T first.