Powtran PI160 Series User Manual

Appendix I
125
Appendix I
CRC CHK high-order
When F9.05
is set to 1:
ADR
01H
CMD
03H
Byte number
04H
Data F002 Hhigh-order
00H
Data F002 Hlow-order
01H
DataF003 Hhigh-order
00H
Data F003 Hlow-order
01H
CRC CHK low-order
CRC checksum
CRC CHK high-order
Command Code: 06H, write a word. For example:Write 5000(1388H)into the address F013H
of the inverter with slave address 02H.
Master command information
ADR
02H
CMD
06H
Data address high-order
F0H
Data address low-order
13H
Data content high-order
13H
Data content low-order
88H
CRC CHK low-order
CRC checksum
CRC CHK high-order
Slave responding information
ADR
02H
CMD
06H
Data address high-order
F0H
Data address low-order
13H
Data content high-order
13H
Data content low-order
88H
CRC CHK low-order
CRC checksum
CRC CHK high-order
I-2 Check mode
Check mode - CRC mode: CRC (Cyclical Redundancy Check) Use RTU frame format, the
message includes an error- checking field that is based on the CRC method. The CRC field checks
the whole content of message. The CRC field has two bytes containing a 16-bit binary value. The
CRC value calculated by the transmitting device will be added into to the message. The receiving
device recalculates the value of the received CRC, and compares the calculated value to the actual
value of the received CRC field, if the two values are not equal,then there is an error in the
transmission.
The CRC firstly stores 0xFFFF and then calls for a process to deal with the successive eight-
bit bytes in message and the value of the current register. Only the 8-bit data in each character is

Powtran PI160 Series Specifications

General

Brand	Powtran
Model	PI160 Series
Category	Inverter
Language	English