Encoding Of Data Types - Siemens Climatix S300 HRV Application Manual

6.3.5 Encoding of data types

A6V10733786_en_c
Data is provided as Big Endian without swapping.
Binary value encoding with one Register:
Each binary BA present value will occupy 1 register
Data type
Binary value
Multistate value encoding with one Register:
Each multistate BA present value will occupy 1 register
Data type
Multistate value (8 bit), unsigned8
Multistate value (16 bit), unsigned16
Unsigned integer value encoding with 2 registers
Each unsigned BA present value will occupy 2 registers. Use FC16 for consistent
writing.
Data type
Unsigned integer (32 bit)
Real value encoding with 2 registers
Each analog BA present value will occupy 2 registers. Use FC16 for consistent
writing.
Data type
Real value (32 bit), Float32
With:
IEEE-754 32-bit float encoding
Engineering of communicative devices
Modbus slave
Byte order
00 aa, with aa = 0x00 or 0x01
Byte order
00 aa, with 1:1 BACnet encoding
bb aa, with 1:1 BACnet encoding
Byte order
dd cc bb aa
dd cc Register address x
bb aa Register address x+1
Byte order
dd cc bb aa
dd cc Register address x
bb aa Register address x+1
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