Siemens SITRANS FC410 Operating Instructions Manual page 80

Functions
7.10 Float transmission
This table shows the different options for setting the transmission method:
Selection
1 - 0 - 3 - 2
0 - 1 - 2 - 3
2 - 3 - 0 - 1
3 - 2 - 1 - 0 *
* = Factory setting
S = Sign
E = Exponent
M = Mantissa
NOTICE
Change of float byte order
If the float byte order is changed by use of PDM to anything other than default, all float
values shown in PDM are wrong.
78
1st 2nd
Byte 1 Byte 0
(MMMMMMMM) (MMMMMMMM)
Byte 0 Byte 1
(MMMMMMMM)
(MMMMMMMM)
Byte 2 Byte 3
(EMMMMMMM) (SEEEEEEE)
Byte 3 Byte 2
(SEEEEEEE) (EMMMMMMM)
Sequence
3rd
Byte 3
(SEEEEEEE)
Byte 2
(EMMMMMMM)
Byte 0
(MMMMMMMM)
Byte 1
(MMMMMMMM)
Operating Instructions, 02/2016, A5E33120874-AC
4th
Byte 2
(EMMMMMMM)
Byte 3
(SEEEEEEE)
Byte 1
(MMMMMMMM)
Byte 0
(MMMMMMMM)
FC410 with Modbus