Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 132)

Formatting and Interpreting Data Blocks
Chapter 7
7Ć50
that follows for the amount of time specified by the value in the position
or dwell words.
Bits 12 and 13 SMCW ID
Bits 12 and 13 must be on to identify the word as an SMCW. If they are
not on, the status block indicates programming error 20.
Bit 14 Accel/Decel
If you turn on bit 14, you must include local acceleration and deceleration
rate words in this move block. Note that if you select local accel/decel,
you enter separate acceleration and deceleration values for the move.
If you turn off this bit, the servo positioning assembly uses the global
accel/decel rate in the parameter block. Note that if you select global
accel/decel, then the move uses the single value programmed in the
parameter block for both acceleration and deceleration rates. For dwells
and presets, this bit must be off; if not, error code 21 appears in the status
block.
Use of local accel and decel rates lowers the number of moves you can
program in a moveset block (Table 7.B).
You must select either the global accel/decel value or a local acceleration
and deceleration value for each move, even though you may anticipate
that the moves will execute in the continuous run mode so that some
programmed accelerations and decelerations do not take place. This is
because the slide stop command in the command block uses the
deceleration rate of the current move that is executing.
Bit 15 Feedrate
If you turn on bit 15, you must enter a local feedrate word in the move
block.
If you turn off this bit, the move is executed at the global feedrate in the
parameter block (rapid traverse rate), and this move block must not
include a local feedrate word.
For dwells and presets, turn off this bit or the programming error bit will
go on in the status block.