ABB AquaMaster 3

AquaMaster 3
Electromagnetic flowmeter
MODBUS Tables Supplement COI/FET2XX/MOD/TBL-EN 5
MODBUS Protocol
1.3.2 RO 1-Bit
Read-only access to single bit types.
Read Discrete Inputs 501 to 503
Read all RO 1-bits
Request Message
(Hex)
Response Message
(Hex)
Error Message
(Hex)
Address
01
Address
01
Function
82
Function
02
Function
02
Exception Code
Exception Code
Starting Address Hi
01
Byte Count
01
Starting Address Lo
f4
Outputs Status*
06
Quantity of Inputs Hi
00
CRC
21
Quantity of Inputs Lo
03
CRC
8a
CRC
78
CRC
05
*Outputs status = 06
Output status
Bit
Register
Value
Variable
Meaning
0
501
0
007
Flow sensor is not reverse wired
1
502
1
008
Flow sensor is a Probe
2
503
1
416
MID (read only switch) is Active
3 to 7
—
—
—
Not Used
1.3.3 RO 8/16-Bit
Read-only access to 8- and 16-bit types.
8-Bit quantities use the Lo byte of Register Value. The Hi byte is 'don't care' and shows value 0 in
Response Messages.
Read Input Register 1002
var12 – Flow sensor settling time (battery power) (16-bit)
Request Message
(Hex)
Response Message
(Hex)
Error Message
(Hex)
Address
01
Address
01
Function
84
Function
04
Function
04
Exception Code
Exception Code
Starting Address Hi
03
Byte Count
02
Starting Address Lo
e9
Register Value Hi*
01
Quantity of Inputs Hi
00
Register Value Lo*
d1
Quantity of Inputs Lo
01
CRC
78
CRC
e0
CRC
fc
CRC
7a
*Register Value = 01d1h = 465