Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 157)

If you are using a 9/230 or 9/440 CNC,
you must make this selection
Servo Parameters
Chapter 7
7-11
Function
This parameter tells the control the number of motors that are connected to
the second servo module board. Include any motor that uses the auxiliary
TB2/TB3 or DAC Output Port (typically the spindle). It is only valid
when configuring 9/260 or 9/290 systems.
Axis Parameter Number
Mill/Lathe Grinder
All [134] [138]
Range
Selection Result
(a) NONE
(b) ONE
(c) TWO
(d) THREE
(e) FOUR
(f) FIVE
Notes
This is not a “per axis” parameter. The value entered here affects all axes.
Important: This parameter sets the total number of motors connected to a
servo board. If you intend to use other ports on that servo board to return
multiple feedbacks for any motor, you do not count these feedback ports as
motors. For example if you have two motors connected to a four axis
servo card and two feedbacks for each motor (one motor--mounted encoder
for velocity feedback and one linear slide for position feedback) you would
set this parameter at two even though you will be using all four ports on
the servo card.
Each servo used for a split axis counts as one motor. Each servo of a dual
axis group also counts as one separate motor.
When using the adaptive depth feature, the depth probe is configured as an
axis with no output port, and is counted as a motor on the board. For
instance, this parameter would be set to three for a system that uses two
motors and a probe for adaptive depth.
7.1.2
Num Motors 2nd Brd
(9/260 - 290)