Endress+Hauser MODBUS RS485 - Page 66

Operation Proline Promag 53 MODBUS RS485
66 Endress+Hauser
Data types
The following data types are supported by the measuring device:
• FLOAT (floating-point numbers IEEE 754)
Data length = 4 bytes (2 registers)
• INTEGER
Data length = 2 bytes (1 register)
• STRING
Data length = depends on device parameter,
e.g. illustration of a device parameter with a data length = 18 bytes (9 registers):
Byte 3 Byte 2 Byte 1 Byte 0
SEEEEEEE EMMMMMMM MMMMMMMM MMMMMMMM
S = sign
E = exponent
M = mantissa
Byte 1 Byte 0
Most significant byte
(MSB)
Least significant byte
(LSB)
Byte 17 Byte 16 … Byte 1 Byte 0
Most significant byte
(MSB)
… Least significant byte
(LSB)