KROHNE MFC 400 Modbus - Manual (Page 10)

5
MODBUS PROTOCOL
10
MFC 400
www.krohne.com 05/2013 - 4002525102 - AD Modbus MFC 400 R02 en
With S = sign, E = exponent, M = mantissa/fraction
5.2.4 64-bit values
With S = sign, E = exponent, M = mantissa/fraction
Float (single precision, IEEE 754)
MSB LSB + 1 LSB + 1 LSB
SEEEEEEE EMMMMMMM MMMMMMMM MMMMMMMM
Little Endian
Register Hi Lo
N LSB + 1 LSB
N + 1 LSB + 3 LSB + 2
N + 2 LSB + 5 LSB + 4
N + 3 MSB LSB + 6
Big Endian
Register Hi Lo
N MSB LSB + 6
N + 1 LSB + 5 LSB + 4
N + 2 LSB + 3 LSB + 2
N + 3 LSB + 1 LSB
Double (double precision, IEEE 754)
MSB MSB MSB MSB LSB + 6 LSB + 6 LSB + 6 LSB + 6 LSB + 5 LSB + 5 LSB + 5 LSB + 5 LSB + 4 LSB + 4 LSB + 4 LSB + 4
SEEEEEEE EEEEMMMM MMMMMMMM MMMMMMMM
LSB + 3 LSB + 3 LSB + 3 LSB + 3 LSB + 2 LSB + 2 LSB + 2 LSB + 2 LSB + 1 LSB + 1 LSB + 1 LSB + 1 LSB LSB LSB LSB
MMMMMMMM MMMMMMMM MMMMMMMM MMMMMMMM