Operating instructions

WirelessHART Fieldgate SWG70 A Appendix: Modbus Interface
Endress+Hauser 93
A.1.3 Data types
Fieldgate SWG70 supports three different data types, which are interpreted and stored as described
below:
• Floating point, Unsigned Integer16, Unsigned Integer8
Floating point
Unsigned16
Unsigned8
Value range (±) 1.175 * 10
-38
to 3.403 * 10
38
Byte Structure
Storage Float Swapped Float
Modbus Register 1
Modbus Register 2
Sign Exponent (8 bit) Fraction (23 bit)
31
0
23
015
31 16
31 16
015
Value range 0 to 65.535
Byte Structure
Storage Unsigned Integer16 Swapped Unsigned Integer16
Modbus Register 1
Value (16 bit)
15
0
015
015
Value range 0 to 255
Byte Structure
Storage Unsigned Integer8 Swapped Unsigned Integer8
Modbus Register 1
Value (8 bit)
15
70
00000000
015 7
00000000
015 7
0000000
0