Rockwell Automation 57C422B 2 Axis Servo Module - Manual (Page 112)

F-2 2-Axis Servo Module M/N 57C422B
M/N 57C422B
If the "B/M" designation on the side of the module is "B/M
57422-2, " all of the features listed below are supported. If
the label reads "B/M 57422-1B," the module supports only
items 2, 3, and 4.
1. Programmable edge detection (register 41)
2. Programmable auto-acknowledge (register 63)
3. Bit 7 in register 130 allows for programming a position
cam in which the end points are not equal
4. Absolute moves after ramped gear disable are
supported.
* As in other parts of this instruction manual, register
numbers refer to the X axis; Y axis registers = X axis
register + 2048. Only registers 64 and 4095 are exceptions;
they are used for both the X and Y axes.