AC90 TENSION CONTROL FREQUENCY INVERTER MANUAL BASIC OPERATION AND TRIAL RUN
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Command code: 06H, write a word (Word)
Function: write a word data in the designated data address. It can be used to revise the frequency inverter parameters.
For instance: 5000 (1388 H) is written into the 3000H address of slave frequency inverter with address 1. Then the
structure of this frame is described as follows:
RTU host machine order information
START
Transmission time of 3.5 bytes
Slave machine address
01H
Command code
06H
Write data address high-order
30H
Write data address low-order
00H
Data content high-order
13H
Data content low-order
88H
CRC CHK low-order
8BH
CRC CHK high-order
9CH
EBD
Transmission time of 3.5 bytes
RTU Slave machine responding information
（
normal
）
START
Transmission time of 3.5 bytes
Slave machine address
01H
Command code
06H
Write data address high-order
30H
Write data address low-order
00H
Data content high-order
13H
Data content low-order
88H
CRC CHK low-order
8BH
CRC CHK high-order
9CH
EBD
Transmission time of 3.5 bytes
RTU Slave machine responding information
（
abnormal
）
START
Transmission time of 3.5 bytes
Slave machine address
01H
Command code
86H
Error code
01H
CRC CHK low-order
83H
CRC CHK high-order
A0H
END
Transmission time of 3.5 bytes
Command code: 08H, circuit auto-detection
Function: Send back the slave machine responding information which is identical with the host machine command
information. It is used to check whether the signal transmission between the host machine and slave machine is regular
or not. The checking code and the data can be set freely.
