VFD68 Variable Frequency Drives
98
Write Holding Register Data (H06 or 06)
The following tables contain a query message directed to the VFD68 slave instructing a write to a register
address (parameter value) using the 2 byte preset data, followed by the VFD68 response message (Table 97
through Table 100).
Example
The following tables contain a query message directed to the VFD68 slave address 5 (H05) instructing a 2 byte
preset data write a value of 60HZ (H1770) to the running frequency RAM register address (system
environment variable) of 40014, followed by the VFD68 response message (Table 101, Table 102).
Note:
For broadcast communication, no response is returned in reply to a query; therefore, the next query
must be made when the VFD processing time has elapsed after the previous query.
Table 97: Query Message
Slave Address
Function
Register Address
Preset Data
CRC Check
(8 bit)
H06 (8 bit)
H (8 bit)
L (8 bit)
H (8 bit)
L (8 bit)
L (8 bit)
H (8 bit)
Table 98: Normal Response (Response Message)
Slave Address
Function
Register Address
Preset Data
CRC Check
(8 bit)
H06 (8 bit)
H (8 bit)
L (8 bit)
H (8 bit)
L (8 bit)
L (8 bit)
H (8 bit)
Table 99: Query Message Setting
Message
Setting Description
Slave Address
Address to which the message will be sent. Setting address to 0 enables broadcast
communication.
Function
Set H06
Register Address
Address of holding register to which data will be written
Register address = holding register address (decimal)-40001
For example, setting the register address 0001 reads the data of the holding register 40002.
Preset Data
Data that will be written to the holding register. The written data is always 2 bytes.
Table 100: Description of Normal Response
1
1.
Slave address, function, register address, preset data, and CRC check of the normal response are identical to those of
the query message. No response is made for broadcast communication.
Message
Setting Description
Slave Address
Address to which the message is sent. Setting address to 0 enables broadcast communication.
Function
Set H06
Register Address
Address of holding register to which data is written
Register address = holding register address (decimal)-40001
For example, setting the register address 0001 reads the data of the holding register 40002.
Preset Data
Data that is written to the holding register. The written data is always 2 bytes.
Table 101: Query Message
Slave Address
Function
Register Address
Preset Data
CRC Check
H05 (8 bit)
H06 (8 bit)
H00 (8 bit)
H0D (8 bit)
H17 (8 bit)
H70 (8 bit)
H17 (8 bit)
H99 (8 bit)
Table 102: Normal Response (Response Message)
1
1.
Slave address, function, register address, preset data, and CRC check of the normal response are identical to those of
the query message. No response is made for broadcast communication.
Slave Address
Function
Register Address
Preset Data
CRC Check
H05 (8 bit)
H06 (8 bit)
H00 (8 bit)
H0D (8 bit)
H17 (8 bit)
H70 (8 bit)
H17 (8 bit)
H99 (8 bit)
