Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 154)

Formatting and Interpreting Data Blocks
Chapter 7
7Ć72
replace the old copy, it continues executing the moveset block, starting
with the next move block. If you had changed the remaining move blocks
in the data table before transfer, the 1771-ES expander executes the
changed move blocks.
If the current block is completed before the servo positioning assembly
receives the new copy of the moveset block, the next move will not
execute immediately. This would cause an unintended delay for run
moves.
Bit 13 Initialize Home
In the manual mode, turn on bit 13 to generate an initialize home
command. This command is functional only when the servo positioning
assembly is in the manual mode and the axis is stopped. The status block
indicates a programming error if you issue the initialize home command
while the axis is moving.
To execute this command, the servo positioning assembly sets the axis
current position register to the home position value in the parameter block
and clears any accumulated offsets.
Bits 17 thru 14 Control Word 1 ID
Set bits 17 thru 14 to 1100 to identify this as axis control word 1.
If the control word 1 ID bits for any of the axes are incorrect, the status
block indicates a programming error for the axis with the incorrect ID,
and all axes execute slide stops.
Axis Control Word 2
Figure 7.44 shows axis control word 2. Bits 12 and 14 apply only to the
manual mode.