Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS User Manual

Page 125

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Formatting and Interpreting Data Blocks

Chapter 7

7Ć43

Axis 1

Axis 2

Axis 3

Odd Moveset Block

001

010

011

Even Moveset Block

100

101

110

These rules apply to moveset block ID assignment (Figure 7.31):

1. You must identify the first moveset block for an axis as odd (001 for

axis 1, 010 for axis 2, 011 for axis 3).

2. The next-move-set pointer of any moveset block may point to the

first moveset block for the axis. Consequently, the first moveset can
point to itself.

3. Except for rule 2, any moveset block with ID 001 must point to

moveset blocks with ID 100, and moveset blocks with ID 100 must
point to moveset blocks with ID 001.

4. Except for rule 2, moveset blocks with ID 010 must point to moveset

blocks with ID 101, and moveset blocks with ID 101 must point to
moveset blocks with ID 010.

5. Except for rule 2, a moveset block with ID 011 must point to a

moveset block with ID 110 and a moveset block with ID 110 must
point to a moveset block with ID 011.

Consequently, the movesets of a series for an axis typically alternate
between even and odd IDs (Figure 7.32).

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