Vortex IR610 Series, Руководство пользователя

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Appendix A Modbuscommunication protocol IR610 high performance vector control frequency inverter user manual
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Number of function
code
Including the register address (2Byte), the number of registers n(2Byte)
and the register content (2nByte), etc.see A3 in detail
CRC CHK low level It indicates the replying data or the data waiting to
write-in. CRC 16 check value,During the transmission, high bit is put in
frontand low bit is at the back.see detail in A.5 Chapter
CRC CHK high level
FRAME END More than 3.5 byte transmission time
A.3 Command code instruction
A.3.1 Command code 0x03Read multiple registers or status words

Request PDU
Command code 1byte 0x03
initial address 2byte
0x0000
～
0xFFFF(high 8
bit in front)
Number of registers 2byte 0x0001-0x0010 (1
～
16,high 8 bit in front)

Response PDU
Command code 1byte 0x03
Initial address 1byte 2n
（
n means Number of
registers
）
Number of registers 2* nbyte Register value high 8 bit
in front,first send initial
address
’register value

Wrong PDU
Command code 1byte 0x83
Abnormal code 1byte See A.4Abnormal
response information
Currently Modbus protocol 0x03 command code does not support cross-group read multiple function
codes, it will be wrongif more than the current group of function code number
A.3.2 Command code 0x06 write single registers or status word command codes
Request PDU
Command code 1byte 0x06
Initial address 2byte 0x0000
～
0xFFFF(high 8