Newport MM4006, User Manual

Page: 231 / 411

MM4006
SR — Set right travel limit
Usage
■
IMM
■
PGM
■
MIP
Syntax x x S R n n or xxSR?
Parameters
Description x x [int]
nn [float]
Range x x
Units x x
nn
Defaults x x
nn
nn
Missing:
Out of range:
Floating point:
Missing:
Out of range:
Axis number.
Right (positive) software travel limit.
1 to 8.
Max (home value set by ZH or current position or des-
tination (if in motion)) to 2147483647 x encoder reso-
lution.
Reading of the right travel limit value.
None.
Defined motion units.
Error B.
Error B.
Error A.
Error C.
Error C.
Description T h i s command defines the value for the positive (right) software travel
limit. It should be used to restrict travel in the positive direction to protect
the motion device or its load. For instance, if traveling
full range, a stage
could push its load into an obstacle. To prevent this, the user can reduce
the allowed travel by changing the software travel limit.
Since a motion device must be allowed to find its home position, the home
switch and/or sensor must be inside the travel limits. This means that both
positive and negative travel limits cannot be set on the same side of the
home position. A more obvious restriction is that the negative limit cannot
be greater than the positive limit. If any of these restrictions is not met, the
controller will return error C.
NOTE
If the command is issued for an axis in motion, the new limit should not
be set inside the current travel. If the motion in progress could reach the
new desired software limit, the command is not accepted and the con-
troller returns error D.
NOTE
Be careful when using this command. The controller does not know the
real hardware limits of the motion device or application. Always set the
software limits inside the hardware limits (limit switches). In normal
operation, a motion device should never hit a limit switch.
If you want to change the software limits, note that the values selected in
remote mode can't exceed the values selected in local mode (already
available as a standard parameter of the stage).
If you want to increase these limits:
O D o care about the hardware limits.
O Use the local mode, from the front panel.
Returns I f the sign "?" takes place of the nn value, the controller returns the value
of the positive (right) software travel limit for #xx axis.
(%)
ED110181511020 — 03/03
3.134 t N e v v p o r t .