User Manual Chapter 5
GFK-1742F Jan 2020
DSM314 to Host Controller Interface 142
3.06 Feed Hold (On Transition). This command causes any motion programs in progress
to stop at the active program acceleration rate. The Feed Hold command does not
stop motion commanded by a master source in Follower Enabled Mode. Once the
motion is stopped, the Moving status bit is cleared, and the In-Zone status bit is set
when the In Zone condition is attained. Jog commands are allowed when in the Feed
hold condition. After an ON transition, program motion will stop, even if the
command bit transitions back OFF before motion stops.
Feed Hold (Off Transition). This command causes any motion programs interrupted
by Feed Hold to resume at the programmed acceleration and velocity rate.
Additional program moves will then be processed, and normal program execution
will continue. Feed Hold OFF behaves in a similar fashion to an Execute Program
command except the path generation software uses only the remaining distance in
the program.
If jogging occurred while Feed Hold was ON, the interrupted Move command will
resume from where the axis was left after the Jog. The Move finishes at the correct
programmed velocity and continues to the original programmed position as if no
jog displacement occurred.
3.07 Enable Drive / MCON. If the Module Error Present and Drive Enabled %I status bits
are cleared, this command will cause the Drive Enable relay contact to close and the
Drive Enabled %I bit to be set. When the Drive Enabled %I bit is set, the path
generation and position control functions are enabled, and servo motion can be
commanded. A signal will be sent (MCON) to the digital servo enabling the drive.
Enable Drive must be maintained ON to allow normal servo motion (except when
using Jog commands). If using the Force Analog Output immediate command (see
Section 4.06, “Force Analog Output”), the applicable Enable Drive signal must be on
to produce an analog output with this command.
3.08 Find Home. This command causes the DSM314 to establish the Home Position. A
Home Limit Switch Input from the I/O connector roughly indicates the reference
position for Home, and the next encoder marker encountered indicates the exact
home position. When the Home Mode axis configuration is set to MOVE+ or MOVE-
, the Home Limit Switch input will be ignored. For a Servo Axis, the configured Home
Offset defines the location of Home Position as the offset distance from the Home
Marker. The Position Valid %I bit indication is set at the conclusion of the Home
Cycle. See Chapter 6 for additional Home Cycle information. See Appendix C for
absolute encoder information.
3.09 Jog Plus. When this command bit is ON, the axis moves in the positive direction at
the configured Jog Acceleration and Jog Velocity rates. Turning Jog Plus OFF causes
the axis to decelerate and stop. If Jog Plus is momentarily turned off, even for one
host controller sweep, the axis will decelerate to a stop then accelerate and continue
jogging. The axis will move as long as the Jog Plus command is maintained and the
configured Positive End Of Travel software limit or Positive Overtravel switch is not
encountered. The Overtravel switch inputs can be disabled using the OT Limit
configuration parameter. Jog Plus may be used to jog off of the Negative Overtravel
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