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

Page 143

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Formatting and Interpreting Data Blocks

Chapter 7

7Ć61

Axis Control Word 1

The functions of many of the bits in axis control word 1 depend on the
state of bit 7, which determines whether the mode of operation is auto or
manual (Figure 7.41).

Figure 7.41

Axis Control Word 1

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

Axis Control Word 1

Control Word 1 ID

Auto

Manual
Initialize

Home

Moveset

Override

New

Parameter

Offset

Reset

1 1 0 0

1 = Auto Mode

0 = Manual Mode

Auto

Manual

Jog +

Start

Jog -

Preset

Next

Move

Begin

EOM

Stop
Escape

Search

Home

Go Home

Slide

Stop

Software

Stop

11025

Bit 0 Next Move

In the auto mode, turn on bit 0 to generate a next move command. The
next move command causes the servo positioning assembly to discontinue
executing the current move and start executing the next move.

If the endpoints for the current move and the next move are in the same
direction from the current axis position, the axis accelerates or decelerates
to the final velocity for the next move at the programmed acceleration rate
for the next move.

If the endpoint for the next move is in the opposite direction from the
endpoint of the current move, the servo positioning assembly performs a
slide stop using the decel rate programmed for the current move, then
executes the next move (bit 5, slide stop).

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