Preset Single Register (06 Hex); Preset Multiple Registers (10 Hex) - Danfoss VLT Compressor Drive CDS 803 Design Manual
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RS485 Installation and Set-...
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 7.29 Response
7.10.5 Preset Single Register (06 hex)
Description
This function presets a value into a single holding register.
Query
7
7
The query telegram specifies the register reference to be
preset. Register addresses start at 0, that is, register 1 is
addressed as 0.
Example: Write to parameter 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 7.30 Query
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 7.31 Response
64
®
VLT
Compressor Drive CDS 803
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
–
Danfoss A/S © 12/2015 All rights reserved.
7.10.6 Preset Multiple Registers (10 hex)
Description
This function presets values into a sequence of holding
registers.
Query
The query telegram specifies the register references to be
preset. Register addresses start at 0, that is, register 1 is
addressed as 0. Example of a request to preset 2 registers
(set parameter 1-24 Motor Current to 738 (7.38 A)):
Field name
Slave address
Function
Starting address HI
Starting address LO
Number of registers HI
Number of registers LO
Byte count
Write data HI (Register 4: 1049)
Write data LO (Register 4: 1049)
Write data HI (Register 4: 1050)
Write data LO (Register 4: 1050)
Error check (CRC)
Table 7.32 Query
Response
The normal response returns the slave address, function
code, starting address, and quantity of registers preset.
Field name
Slave address
Function
Starting address HI
Starting address LO
Number of registers HI
Number of registers LO
Error check (CRC)
Table 7.33 Response
Example (hex)
01
10
04
07
00
02
04
00
00
02
E2
–
Example (hex)
01
10
04
19
00
02
–
MG18N202
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