ModBus TCP

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In WebHMI, such addressing of the ModBus TCP registers defined:

Register address	Description	Data type	Read/Write
Cx	Coils. X — output number (valid range is 0..65535). Examples: C1, C3, C44	Bit	Read/Write
DIx	Discrete Inputs. X — input number (valid range 0 ..65535). Examples: DI1, DI3, DI44, DI45000	Bit	Read/—
HRx	Holding Registers. X — register address (valid range 0..65535). Examples: HR1, HR3, HR44, HR65043	Bit, Byte, Word, Double Word	Read/Write
MHRx	Identical to HRx. The difference is that the writing in such registers occurs using the Modbus function No. 16 (Preset Multiple Register).	Bit, Byte, Word, Double Word	Read/Write
IRx	Input Registers. X — register address (valid range 0..65535). Примеры: IR1, IR3, IR44, IR65043	Bit, Byte, Word, Double Word	Read/—

Note: By default, when reading double words, two queries will be used - one for each word. To explicitly set double-word reading with multuple read queriy, you must enable grouping in the connection properties.