Rockwell Automation 1775-KA PLC-3 Communication Adapter Module User Manual - Manual (Page 37)

Installation
Chapter 2
2Ć25
This menu allows you to select options that apply to only the Data
Highway port of the 1775–KA module. These options are described
below.
Enable/Disable Port
This option determines whether or not the 1775–KA module can
communicate over the Data Highway. you must select the ENABLE
option in order to allow communication to take place. If you make no
selection, the PLC–3 disables this port by default.
Note, however, that you cannot use LIST to change any other parameters
of the Data Highway port unless you first DISABLE the port. After you
are done entering parameters through LIST, don’t forget to ENABLE the
Data Highway port again.
Station Number
This option selects the number by which the PLC–3 station is identified
on the Data Highway. Allowable station numbers are 1 to 376 octal. In
particular, note that the number 377 is illegal. Entering 377 as the station
number will automatically disable the 1775–KA module, and you will not
be able to ENABLE it again through LIST until you select a different
station number. If you make no selection, the PLC–3 assumes the illegal
address 377 by default.
Baud Rate
This option specifies the communication rate over the Data Highway. A
communication rate of 57,600 baud is recommended.
Modem Port
Selecting option 3 MODEM PORT from the above menu (section titled
Programmable Configuration Parameters) causes LIST to present the
following menu:
KA–NN modem port
1 ENABLE/DISABLE PORT
2 STATION NUMBER
3 BAUD RATE
4 COMMUNICATION MODE