Rockwell Automation 57C422B 2 Axis Servo Module - Manual (Page 81)

PROGRAMMING 4-53
master reference position.
Each point in the position cam table consists of four bytes
(double precision integers). There are a maximum of 956
positions in the table if position cam is selected.
4.50.1 Register 125: Master Axis Position Increment
Register 125 is used to store the master axis position
increment (in counts) for the position cam. This value selects
the number of counts the master axis moves to increment to
the next position in the position cam table. This value cannot
be a negative number. This value must not exceed 32767. All
points in the table are the same distance apart.
4.50.2 Registers 126, 127: Master Reference Position
Registers 126 and 127 are used to store the master axis
position for the position cam. This double precision integer
selects the position for the master at which the cam will
enable movement of the following axis. Before the position
cam can be enabled, the master axis must be behind the
master reference position. In rotary mode, the master
reference position must be less than the unwind limit or the
Figure 4.53 – Master Axis Position Increment Register