Flo-Ware Manual - Hachflow

Device communication
printed, exported to a spreadsheet or copied to the clipboard. If the datalog channel
configuration changes, the modbus map changes, and a new Modbus map should be
generated.
To generate the map, open the FL900 Series driver in FloWare, select the Utilities tab
and then select Modbus Map. The Modbus map is shown for the datalog channel
configuration that is current. An example of a Modbus map is shown in Figure 12.
Figure 12 Example Modbus map for logger program
4.1.A.4.2 Register order
The data order in the logger registers is big-endian with the most significant byte first,
followed by the least significant byte second. The register order for multi-register numeric
values (floats and integers) is little endian. If a different ordering scheme is needed, the
data must be processed externally.
4.1.A.4.3 Measurement registers
The logger implements 16 Modbus measurement registers, where each register maps
directly to 1 of 16 data log channels. One or more measurement registers can be read
with Modbus Function Code 03 Read Holding Registers. Refer to Table 4.
The definition of each data log channel is made when a user changes the data log
configuration and programs the logger. To know what each measurement register
represents, the user has two options. The first option is for applications where the logger
is connected to an external device that is manually configured by the user. The second
option is for applications where the logger is connected to an external device that is
53