Woodward easYgen-3000XT Series, Руководство пользователя

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Fig. 333: Visualization configurations
Data Format(s)
Modbus registers are read and written according to the Modbus standard as Big-endian.
Composite data types like LOGMAN, ANALOGMANAGER, and TEXT use separate
descriptions.
Configuration
The Modbus interface can be used to read/write parameters. According the Modbus
addressing range for the configuration addresses, the range starts at 40001 and ends at
450000. You can always access only one parameter of the system in this address range.
The Modbus address can be calculated depending on the parameter ID as illustrated
below:
Parameter ID < 10,000 Parameter ID >= 10,000
Modbus address = 40000 + (Par. ID+1) (Par. ID+1)
Table 130: Address calculation
Block reads in this address range depend on the data type of the parameter. This makes
it important to set the correct length in Modbus registers which depends on the data type
(UNSIGNED 8, INTEGER 16, etc.).
Refer to ╚═▷ Table 131 for more information.
Types Modbus
registers Remarks
UNSIGNED 8 1
UNSIGNED 16 1
INTEGER 16 1
UNSIGNED 32 2
INTEGER 32 2
LOGMAN 7 Little-endian is used for LogicsManager to be compatible
with (non-XT) easYgen series
845 easYgen-3000XT Series B37574
7 Interfaces And Protocols
7.6 Modbus Protocol
Released