ABB AquaMaster 3 - Safety Information; Electrical Safety

AquaMaster 3
Electromagnetic flowmeter
MODBUS Tables Supplement COI/FET2XX/MOD/TBL-EN 3
MODBUS Protocol
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
Address
Range
Applicable Function
Codes
AquaMaster
Data Type
Description
0001 .. 0500
01 Read Coils
05 Write Single Coil
15 Write Multiple Coils
RW 1-Bit
Read/write access to single bit types.
0501 .. 1000
02 Read Discrete Inputs
RO 1-Bit
Read only access to single bit types.
1001 .. 2000
04 Read Input Registers
RO 8/16-Bit
Read only access to 8- and 16-bit types.
2001 .. 4000
04 Read Input Registers
RO String
Read only access to string types.
4001 .. 5000
04 Read Input Registers
RO 32-Bit
Read only access to 32-bit types.
5001 .. 7000
04 Read Input Registers
RO Float
Read only access to float types.
8001 .. 10000
03 Read Holding Registers
06 Write Single Register
16 Write Multiple Registers
RW 8/16-Bit
Read/write access to 8- and 16-bit types.
10001 .. 12000
03 Read Holding Registers
16 Write Multiple Registers
RW String
Read/write access to string types.
12001 .. 13000
03 Read Holding Registers
16 Write Multiple Registers
RW 32-Bit
Read/write access to 32-bit types.
13001 .. 14000
03 Read Holding Registers
16 Write Multiple Registers
RW Float
Read/write access to float types.
Table 2.1 AquaMaster 3 MODBUS Register Mapping