Rockwell Automation 8520-MUM 9/Series CNC Mill Operation and Programming Manual Documentation Set - Manual (Page 261)

Communications
Chapter 9
9-5
PORT TYPE
Port type options differ depending on the port you select.
Port Type
Port A RS232-C
Port B RS232-C or RS422A
BAUD RATE
You can set the baud rate at these speeds (in bits per second):
300, 600, 1200, 2400, 4800, 9600, MAX
MAXIMUM BAUD RATE
If you need to operate your 9/Series control at a baud rate higher than
9600 bps, you can toggle between 19200 (default setting) and 38400 bps:
SAVE
CHANGE
COPY
DEFLTS
SETMAX
19200
SETMAX
38400
Important: The “SAVE CHANGES” and “COPY DEFLTS” softkeys
have no affect on the maximum baud rate setting.
Although you can make your selection at any time, only when “MAX”
displays is it implemented for all ports on your control. Until then, your
selection is highlighted to remind you of your currently selected maximum
baud rate. Once you’ve made a selection, it is effective until you make
another selection.
Important: Selecting a maximum baud rate that your device does not
support causes the selection to be ignored. For ODS device drives, you
must cycle power on the control after changing the baud rate in order for
the control to recognize your selection. If one or both ports are busy, the
request to select a maximum baud rate is ignored, returning the error,
“PORT IS BUSY -- REQUEST DENIED”.
Important: Your “MAX” selection establishes the maximum baud rate for
all serial ports on your 9/Series control. A combination of 19200 baud on
one port and 38400 baud on another port is not allowed.