Rockwell-automation 1771-QB Linear Pos. Bedienungsanleitung PDF herunterladen (Seite 108)

Formatting Module Data (WRITES)

Chapter 7

729

Setpoint Block Control Word (word 1)

The setpoint block control word identifies the block as a setpoint block,

specifies the axis or axes for which the setpoints are intended, and indicates the

number of setpoints defined in the block.

Figure 7.38

Setpoint

Block Control W

ord

5007

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

Number of setpoints

(1 to 12), binary

format

Identifies this as

a setpoint block

Destination:

0 1 Axis 1

1 0 Axis 2

1 1 Both Axes

0000

000

Bit 8 – Axis 1

If this bit is set, the module applies setpoint moves defined in this block to

axis 1.

Bit 9 – Axis 2

If this bit is set, the module applies setpoint moves defined in this block to

axis 2.

Important: If bits 8 and 9 are both set, a single block transfer will update both

axes. You should only set both bits if your application requires that both axes

use the same setpoint moves, i.e., that both axes move in parallel.

Incremental/Absolute Word (word 2)

The incremental/absolute word defines the type of move performed by each

setpoint in the setpoint block:

absolute setpoint moves define a new endpoint in relation to the

zero-position offset specified in the parameter block

incremental setpoint moves define a new endpoint in relation to the current

axis position (if the axis is stationary) or to the targeted endpoint (if the axis

is still in motion)

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Rockwell-automation 1771-QB Linear Pos. Bedienungsanleitung Seite 108