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

Page 124

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Formatting and Interpreting Data Blocks

Chapter 7

7Ć42

Figure 7.30

Moveset Control Word (MCW)

17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00

Moveset Control Word (MCW)

0 0

0

0 = Inch

1 = Metric
1 = End of

program
1 = Escape

move

Moveset Block ID:

11014

Number of moves;

BCD format
0 = Data valid

1 = Data not valid

0 0 1

0

0

1

1

1

1

1

0

0

1

0

1

0

1

0

=

=

=

=

=

=

Axis 1 Odd Moveset

Axis 2 Odd Moveset

Axis 3 Odd Moveset

Axis 1 Even Moveset

Axis 2 Even Moveset

Axis 3 Even Moveset

Bits 0 thru 5 Number of Moves

Bits 0-5 specify the number of moves in this moveset in BCD format.
Due to the maximum block size of 64 words, the maximum number of
moves you can program in a moveset block is 21. If you use local rates
for any moves, the maximum number of moves is reduced.

To accommodate more moves, program additional movesets.

Bit 7 Data Valid

If bit 7 is off, it tells the 1771-M3 controller that data in the moveset block
is valid and can be executed.

This bit can be used by the operator when making on-line moveset
changes. If the bit is on when the 1771-M3 controller receives the
moveset, the controller does not execute the moveset. The controller
continues to request the moveset until the data valid bit is off.

Bits 12, 11, 10 Moveset ID

Bits 12, 11, 10 tell the 1771-M3 controller whether it is an odd or an even
moveset block and also identifies the axis to which the moveset applies.

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