Powtran PI500 series - Page 155

Appendix I
151
Appendix I
while(length--)
{
crc_value^=*data_value++;
for(i=0;i<8;i++)
{
if(crc_value&0x0001)
{
c r c _ v a l u e = (c r c _ v a l u e > > 1 )^0xa001;
}
else
{
crc_value=crc_value>>1;
}
}
}
return(crc_value);
}
I-3 Definition of communication parameter address
The section is about communication contents, it‟s used to control the operation, status and related
parameter settings of the inverter. Read and write function-code parameters (Some functional code is
not changed, only for the manufacturer use or monitoring): the rules of labeling function code
parameters address:
The group number and label number of function code is used to indicate the parameter address:
High byte: F0 to FB (F group), A0 to AF (E group), B0 to BF(B group),C0 to C7(Y group),70 to
7F (d group) low byte: 00 to FF
For example: address F3.12 indicates F30C; Note: L0 group parameters: neither read nor change;
d group parameters: only read, not change.
Some parameters can not be changed during operation, but some parameters can not be changed
regardless of the inverter is in what state.When changing the function code parameters, please pay
attention to the scope, units, and relative instructions on the parameter.
Besides, due to EEPROM is frequently stored, it will redUce the life of EEPROM, therefore
under the communication mode some function code do not need to be stored and you just change the
RAM value.
If F group parameters need to achieve the function, as long as change high order F of the
function code address to 0. If E group parameters need to achieve the function, as long as change high
order F of the function code address to 4. The corresponding function code addresses are indicated
below: high byte: 00 to 0F(F group), 40 to 4F (E group), 50 to 5F(B group),60 to 67(Y group)low
byte:00 to FF
For example:
Function code F3.12 can not be stored into EEPROM, address indicates as 030C; function code
E3.05 can not be stored into EEPROM, address indicates as 4305; the address indicates that only
writing RAM can be done and reading can not be done, when reading, it is invalid address. For all
parameters, you can also use the command code 07H to achieve the function.
Stop/Run parameters section:
Parameter
address
Parameter description
Paramete
r address
Parameter description