User`s manual
5-12 Motion Mate™ DSM314 for Series 90™-30 PLCs User's Manual
–
January 2001 GFK-1742A
5
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 PLC 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
switch if the
Clear Error
%Q bit is also maintained on.
See Chapter 6, Non-Programmed
Motion, for more information on Jogging with the DSM314.
3.10
Jog Minus.
When this command bit is ON, the axis moves in the negative direction at the
configured
Jog Acceleration
and
Jog Velocity
rates. Turning
Jog Minus
OFF causes the axis to
decelerate and stop. If
Jog Minus
is momentarily turned off, even for one PLC sweep, the axis
will decelerate to a stop then accelerate and continue jogging. The axis will move as long as the
Jog Minus
command is maintained and the configured
Negative End Of Travel
software limit or
Negative Overtravel switch is not encountered. The Overtravel switch inputs can be disabled
using the
OT Limit
configuration parameter.
Jog Minus
may be used to jog off of the Positive
Overtravel switch if the
Clear Error
%Q bit is also maintained on.
See Chapter 6, Non-
Programmed Motion, for more information on Jogging with the DSM314.
3.11
Reset Strobe 1, 2 Flag.
The
Strobe n Flag
%I status bit flag informs the PLC that a Strobe
Input has captured an axis position that is now stored in the associated
Strobe n Position
%AI
status word. When the PLC acknowledges this data, it may use the
Reset Strobe n
Flag
%Q
command bit to clear the
Strobe n Flag
%I status bit flag. Once the
Strobe n Flag %I
bit is set,
additional Strobe Inputs will not cause new data to be captured. The flag must be cleared before
another Strobe Position will be captured. As long as the
Reset Strobe n
Flag
%Q command bit is
set, the
Strobe n Flag
bit will be held in the cleared state. In this condition, the latest Strobe Input
position is reflected in the
Strobe n Position
status word, although the flag cannot be used by the
PLC to indicate when new data is present.