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AquaMaster 3
Electromagnetic flowmeter
Request Message
1.3.5 RO 32-Bit
Read-only access to 32-bit types.
Each AquaMaster 3 32-Bit type requires 2 MODBUS Registers (4 bytes). Consequently, RO 32-Bit
Register addresses are assigned at intervals of 2 and the Request Message must provide Quantity of
Inputs in multiples of 2.
32-Bit quantities are arranged in big-endian order.
Read Input Registers 4013 to 4014
var207 – Transmitter Unique ID
Request Message
Address
Function
Starting Address Hi
Starting Address Lo
Quantity of Inputs Hi
Quantity of Inputs Lo
CRC
CRC
MODBUS Tables Supplement COI/FET2XX/MOD/TBL-EN
(Hex)
Response Message
byte19
byte20
byte21
byte22
byte23
byte24
byte25
byte26
byte27
byte28
byte29
byte30
byte31
byte32
byte33
byte34
byte35
CRC
CRC
(Hex)
Response Message
01
Address
04
Function
0f
Byte Count
ac
H Register Value Hi
00
H Register Value Lo
02
L Register Value Hi
b2
L Register Value Lo
fe
CRC
CRC
(Hex)
=char
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
2c
ce
(Hex)
Error Message
01
Function
04
Exception Code
04
00
00
=27
00
1b
bb
8f
MODBUS Protocol
Error Message
(Hex)
(Hex)
84
Exception Code
7
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