Ro 1-Bit; Ro 8/16-Bit - ABB AquaMaster 3 Manual

AquaMaster 3
Electromagnetic flowmeter

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
Address
Function
Starting Address Hi
Starting Address Lo
Quantity of Inputs Hi
Quantity of Inputs Lo
CRC
CRC
*Outputs status = 06
Output status
Bit Register Value
0 501 0
1 502 1
2 503 1
3 to 7 — —

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
Address
Function
Starting Address Hi
Starting Address Lo
Quantity of Inputs Hi
Quantity of Inputs Lo
CRC
CRC
*Register Value = 01d1h = 465
MODBUS Tables Supplement COI/FET2XX/MOD/TBL-EN
(Hex) Response Message
01 Address
02 Function
01 Byte Count
f4 Outputs Status*
00 CRC
03 CRC
78
05
Variable
007
008
416
—
(Hex) Response Message
01 Address
04 Function
03 Byte Count
e9 Register Value Hi*
00 Register Value Lo*
01 CRC
e0 CRC
7a
(Hex) Error Message
01 Function
02 Exception Code
01
06
21
8a
Meaning
Flow sensor is not reverse wired
Flow sensor is a Probe
MID (read only switch) is Active
Not Used
(Hex) Error Message
01 Function
04 Exception Code
02
01
d1
78
fc
MODBUS Protocol
(Hex)
82
Exception Code
(Hex)
84
Exception Code
5