Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 120)

Formatting and Interpreting Data Blocks
Chapter 7
7Ć38
a position-with-offset move in a moveset
an offset command from the command block
This parameter has a 4-digit BCD value that can be in the range +0.0001
to +0.7999 inches or +0.001 to +7.999 mm (Figure 7.27).
Figure 7.27
Offset Word
17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
Offset
Word 24 (Axis 1)
Word 43 (Axis 2)
Word 62 (Axis 3)
inch metric
Sign:
0 = +
1 = -
11049
Offset value, inches or
millimeters, BCD format
decimal
point
decimal
point
Tachometer Conversion Factor
The servo positioning assembly uses bits 00 thru 03 of word 25 (44, 63)
for its loss-of-feedback detection feature (Figure 7.28). The tachometer
calibration procedure explains how to select the value for this word.