Danfoss VLT HVAC Drive FC 100 Series Design Manual page 147

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VLT HVAC Drive Design Guide
7.10.6. Preset Multiple Registers (10 HEX)
Description
This function presets values into a sequence of holding registers.
Query
The query message specifies the register references to be preset. Register addresses start at zero, i.e. register 1 is addressed as 0. Example of a request
to preset two registers (set parameter 1-05 = 738 (7.38 A)):
Field Name
Slave Address
Function
Starting Address HI
Starting Address LO
No. of Registers HI
No. 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)
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
No. of Registers HI
No. of registers LO
Error Check (CRC)
Example (HEX)
01
10
04
19
00
02
04
00
00
02
E2
-
Example (HEX)
01
10
04
19
00
02
-
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7. RS-485 Installation and Set-up
7
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