Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 153)

Formatting and Interpreting Data Blocks
Chapter 7
7Ć71
as this offset bit is on. A preset, initialize home, or reset command clears
the offset accumulator.
Important: An offset command has no effect on the two moves already
stored on board the 1771-ES expander module. Only moves sent to the
1771-ES expander after you issue the offset command are affected.
The offset command can be executed only when the servo positioning
assembly is in the manual mode. When the servo positioning assembly is
in auto mode, use a move-to-position-with-offset move block instead of
the offset command to increment the offset accumulator.
Bit 12 New Parameter
In the manual mode, turn on bit 12 to generate a new parameter
command. This command is typically used to indicate that the parameter
block has been changed and the 1771-M3 controller should request it
again through the status block. The servo positioning assembly must be in
the manual mode, and the axes stopped, for this command to be
acknowledged by turning on the command-taken bit. If you issue the
command while an axis is in motion, the status block indicates a
programming error.
The PC processor transfers the entire parameter block to the 1771-M3
controller in response to the new parameter command. However, only the
axis for which the new parameter command was issued receives updated
parameter values (words 7 thru 25 for axis 1, words 26 thru 44 for axis 2,
words 45 thru 63 for axis 3).
You cannot use the new parameter command to change the parameter
block control word or address pointers. This change requires
reprogramming of the parameter block and re-initialization of the system.
Bit 12 Moveset Override
In the auto mode, turn on bit 12 to generate a moveset override command.
This command provides you with a means of modifying the remaining
move blocks of a moveset block while one of its moves is executing.
When you issue the moveset override command, the 1771-M3 controller
turns on the command-taken bit and requests another transfer of the
current moveset block (unless the last move is executing). After the servo
positioning assembly receives the new copy of the moveset block to