Aquamaster 3 Modbus Register Mapping - ABB AquaMaster 3 Manual

AquaMaster 3
Electromagnetic flowmeter

1.2 AquaMaster 3 MODBUS Register Mapping

The AquaMaster 3 MODBUS interface provides access to AquaMaster 3 parameters described in the
AquaMaster 3 Programming Guide (part no. COI/AQUAMASTER3-EN).
In general, AquaMaster 3 parameters with security access levels 0 to 7 can be read via MODBUS and,
where defined, parameters with security access levels 0 to 4 can be written via MODBUS.
Writeable parameters identified as MID parameters (see Appendix A) become Read Only via MODBUS if
the AquaMaster 3 flow meter has been configured for use as an MID instrument – refer to the
AquaMaster 3 Programming Guide (COI/AQUAMASTER3-EN) for details. Attempting to write to MID
parameters in an MID instrument results in MODBUS exception code 04, Slave Device Failure.
Table 2.1 shows the mapping of AquaMaster 3 MODBUS Registers to MODBUS Function Codes and
AquaMaster 3 data types, section 1.3 provides details of usage for each Register Address Range and
Appendix A provides the Register allocation tables.
Register Applicable Function
Address Codes
Range
0001 .. 0500 01 Read Coils
05 Write Single Coil
15 Write Multiple Coils
0501 .. 1000 02 Read Discrete Inputs
1001 .. 2000 04 Read Input Registers
2001 .. 4000 04 Read Input Registers
4001 .. 5000 04 Read Input Registers
5001 .. 7000 04 Read Input Registers
8001 .. 10000 03 Read Holding Registers
06 Write Single Register
16 Write Multiple Registers
10001 .. 12000 03 Read Holding Registers
16 Write Multiple Registers
12001 .. 13000 03 Read Holding Registers
16 Write Multiple Registers
13001 .. 14000 03 Read Holding Registers
16 Write Multiple Registers
Table 2.1 AquaMaster 3 MODBUS Register Mapping
MODBUS Tables Supplement COI/FET2XX/MOD/TBL-EN
AquaMaster Description
Data Type
RW 1-Bit Read/write access to single bit types.
RO 1-Bit Read only access to single bit types.
RO 8/16-Bit Read only access to 8- and 16-bit types.
RO String Read only access to string types.
RO 32-Bit Read only access to 32-bit types.
RO Float Read only access to float types.
RW 8/16-Bit Read/write access to 8- and 16-bit types.
RW String Read/write access to string types.
RW 32-Bit Read/write access to 32-bit types.
RW Float Read/write access to float types.
MODBUS Protocol
3