Rockwell Automation 1771-QB Linear Pos. - Manual (Page 109)

Formatting Module Data (WRITES)
Chapter 7
7Ć30
Example: If the axis is stationary at +1 inch (from the zero-position offset), an
absolute setpoint move with a position value of 2 inches will move the actuator
1 inch to the +2 inch position. An incremental setpoint move with a position
value of 2 inches will move the actuator 2 inches to the +3 inch position.
Bits 1 through 12 control setpoints 1 to 12 with a one-to-one correspondence. If
a bit is set to 1, the corresponding setpoint move is incremental. If it is reset to
0, the move is absolute. Bits 0, 13, 14, and 15 have no function and must be set
to 0.
Figure 7.39
Incremental/Absolute Word
50080
Setpoints 12 through 1
(0 = absolute, 1 = incremental)
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
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... 0 0 0 0
Setpoint Position
You must set the two setpoint position words for each setpoint move. Units are
in either inches or metric and the format in BCD or binary as determined by the
parameter block. The maximum programmable setpoint position is +799.900
inches or +7999.00 millimeters.