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VFD68 Variable Frequency Drives
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Example
The following tables contain a query message directed to the VFD68 slave address 17 (H11). This message
requests a read of register addresses (parameter values) 41004 (P.4) to 41006 (P.6). These tables also show
the VFD68 slave response message containing the 2 byte Parameter Values P. 4, P. 5, and P. 6 (Table 95
and Table 96).
Register Starting Address: H03 HEB = 1003 decimal. A base number of 40001 decimal must be added to this
Register Starting Address to achieve the Register number of: 41004 decimal for Parameter 4 (see Table 120).
Read value
Register 41004 (P.004); H1770 (60.00 Hz)
Register 41005 (P.005); H0BB8 (30.00 Hz)
Register 41006 (P.006); H03E8 (10.00 Hz)
Table 95: Query Message
Slave
Address
Function
Starting Address
Number of Points
CRC Check
H11 (8 bit)
H03 (8 bit)
H03 (8 bit)
HEB (8 bit)
H00 (8 bit)
H03 (8 bit)
H77 (8 bit)
H2B (8 bit)
Table 96: Normal Response (Response Message)
Slave
Address
Function
Byte
Count
Data
CRC Check
H11
(8 bit)
H03
(8 bit)
H06
(8 bit)
H17
(8 bit)
H70
(8 bit)
H0B
(8 bit)
HB8
(8 bit)
H03
(8 bit)
HE8
(8 bit)
H2C (8 bit)
HE6 (8 bit)