Preset Single Register (06 Hex) - Danfoss VLT Micro Drive FC 51 Design Manual

RS-485 Installation and Set...
Field Name Example (HEX)
Slave Address 01 (frequency converter address)
Function 0F (write multiple coils)
Coil Address HI 00
Coil Address LO 10 (coil address 17)
Quantity of Coils HI 00
Quantity of Coils LO 10 (16 coils)
Error Check (CRC) -
Table 8.27
8.10.4 Read Holding Registers (03 HEX)
Description
This function reads the contents of holding registers in the
slave.
Query
The query message specifies the starting register and
quantity of registers to be read. Register addresses start at
zero, that is, registers 1-4 are addressed as 0-3.
Example: Read 3-03 Maximum Reference, register 03030.
Field Name Example (HEX)
Slave Address 01
Function 03 (read holding registers)
Starting Address HI 0B (Register address 3029)
Starting Address LO 05 (Register address 3029)
No. of Points HI 00
No. of Points LO 02 - (3-03 Maximum Reference is 32 bits
long, i.e. 2 registers)
Error Check (CRC) -
Table 8.28
Response
The register data in the response message are packed as
two bytes per register, with the binary contents right
justified within each byte. For each register, the first byte
contains the high-order bits and the second contains the
low-order bits.
Example: Hex 000088B8=35.000=15 Hz.
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VLT Micro Drive FC 51 Design Guide
Field Name
Slave Address
Function
Byte Count
Data HI
(Register 3030)
Data LO
(Register 3030)
Data HI
(Register 3031)
Data LO
(Register 3031)
Error Check
(CRC)
Table 8.29

8.10.5 Preset Single Register (06 HEX)

Description
This function presets a value into a single holding register.
Query
The query message specifies the register reference to be
preset. Register addresses start at zero, that is, register 1 is
addressed as 0.
Example: Write to 1-00 Configuration Mode, register 1000.
Field Name
Slave Address
Function
Register Address HI
Register Address LO
Preset Data HI
Preset Data LO
Error Check (CRC)
Table 8.30
Response
The normal response is an echo of the query, returned
after the register contents have been passed.
Field Name
Slave Address
Function
Register Address HI
Register Address LO
Preset Data HI
Preset Data LO
Error Check (CRC)
Table 8.31
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Example (HEX)
01
03
04
00
16
E3
60
-
Example (HEX)
01
06
03 (Register address 999)
E7 (Register address 999)
00
01
-
Example (HEX)
01
06
03
E7
00
01
-
83
8 8