Rockwell-automation 2711 MODBUS COMMUNICATIONS FOR PANELVIEW TERMINALS Manual de usuario descargar pdf (Pagina 16)

Publication 2711-6.9 - March 2000

16 Modbus Communications for PanelView Terminals

Data Format

Modicon controllers communicate in either ASCII or RTU (Remote

Terminal Unit) transmission mode. The PanelView only supports RTU

mode. In RTU mode, each 8-bit byte contains 2 four-bit hexadecimal

characters. The following is supported:

• 1 start bit

• 8 data bits (least significant bit first)

• 1 bit for even/odd parity, no bit for no parity

• 1 stop bit if parity used, 2 bits if no parity selected

PanelBuilder32 Tag Editor

Use the Tag Editor or the Tag Form dialog (accessed from the object’s

dialog) to enter tags. There are 2 types of tags:

• digital - for bit data types

• register - for all other data types

Bit Tag Form Dialog

Tag Editor

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Rockwell-automation 2711 MODBUS COMMUNICATIONS FOR PANELVIEW TERMINALS Manual de usuario Pagina 16