Rockwell-automation 1775-KA PLC-3 Communication Adapter Module User Ma Manuale Utente Scaricare il pdf (Pagina 56)

Data Highway Communication

Chapter 3

311

PLC–4 Stations

To read or write to a PLC–4 station, you can send either protected or

unprotected commands.

Switches 2 and 3 (on the second row of switches) at the 1773–KA module

specify whether the PLC–4 station will accept unprotected and protected

commands (respectively) through the Data Highway port of the 1773–KA

module.

Switches 1 and 3 (on the third row of switches) at the 1773–Ka module

specify whether the PLC–4 station will accept protected and unprotected

commands (respectively) through the RS–232–C port of the 1773–KA

module. In all cases, if the switch is set to the closed position, the module

will accept that type of command.

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Rockwell-automation 1775-KA PLC-3 Communication Adapter Module User Ma Manuale Utente Pagina 56