ABB AquaMaster 3

AquaMaster 3
Electromagnetic flowmeter
MODBUS Tables Supplement COI/FET2XX/MOD/TBL-EN 13
MODBUS Protocol
1.3.10 RW Float
Read/Write access to float types.
Float values use IEEE-754 format arranged in big-endian order.
Each AquaMaster 3 RW Float type requires 2 MODBUS Registers (4 bytes). Consequently, RW Float
Register addresses are assigned at intervals of 2 and Fn03 (Read Holding Register) Request Messages
must provide Quantity of Registers in multiples of 2.
Read Holding Registers 13005 to 13006
var30 – Insertion probe – profile factor
Request Message
(Hex)
Response Message
(Hex)
Error Message
(Hex)
Address
01
Address
01
Function
83
Function
03
Function
03
Exception Code
Exception Code
Starting Address Hi
32
Byte count
04
Starting Address Lo
cc
Register Value H Hi
3f
Quantity of Inputs Hi
00
Register Value H Lo
66
Quantity of Inputs Lo
02
Register Value L Hi
66
CRC
0a
Register Value L Lo
67
=0.9000000
CRC
8c
CRC
7c
CRC
72
Each AquaMaster 3 RW Float type requires 2 MODBUS Registers (4 bytes). Consequently, RW Float
Register addresses are assigned at intervals of 2 and Fn16 (Write Multiple Register) Request Messages
must provide Quantity of Registers in multiples of 2 and Byte Count in multiples of 4.
Write Multiple Registers 13009 to 13010
var32 – Probe pipe bore = 10.0000
Request Message
(Hex)
Response Message
(Hex)
Error Message
(Hex)
Address
01
Address
01
Function
90
Function
10
Function
10
Exception Code
Exception Code
Starting Address Hi
32
Starting Address Hi
32
Starting Address Lo
d0
Starting Address Lo
d0
Quantity of Registers Hi
00
Quantity of Registers Hi
00
Quantity of Registers Lo
02
Quantity of Registers Lo
02
Byte count
04
CRC
4e
Register Value H Hi
41
CRC
89
Register Value H Lo
20
Register Value L Hi
00
Register Value L Lo
00
10.0000
CRC
a6
CRC
64