Danfoss FC 300 Design Manual page 172

9. RS-485 Installation and Set-up
The message length is defined in the second byte of the telegram, LGE. When using text transfer,
the index character indicates whether it is a read or a write command.
To read a text via the PWE block, set the parameter command (AK) to 'F' Hex. The index character
high-byte must be "4".
Some parameters contain text that can be written to via the serial bus. To write a text via the
PWE block, set the parameter command (AK) to 'F' Hex. The index character's high-byte must be
"5".
9.4.11. Data Types Supported by FC 300
Unsigned means that there is no operational
sign in the telegram.
9
172
Data types
3
4
5
6
7
9
10
13
33
35
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FC 300 Design Guide
Description
Integer 16
Integer 32
Unsigned 8
Unsigned 16
Unsigned 32
Text string
Byte string
Time difference
Reserved
Bit sequence