LINK Systems System 2500 PLS - Manual (Page 23)

System 2500 Operating & Installation Manual - Revision 07 2-15
machine will come to a stop at the top. This is called the 'stopping angle' in further text of this
manual. The Topstop selection from the Configure Menu (labeled TOPSTP) allows the operator
to program this angle so that an accurate top stop will occur.
The Topstop configuration display indicates on the top line the angle at which the E-Stop relay
will open when a top stop signal is generated. The bottom line allows the operator to enter a new
angle if required. This configuration step is unique in that the operator may move the keyswitch
to the RUN position so that the top stop accuracy can be tested. When the keyswitch is moved to
the RUN position, E-STOP can be cleared (if no errors exist) and the System 2500 will allow the
machine to run. In addition, the YES key on the OIT will become active as a way to initiate the
top stop. The operator can then make several strokes, press the YES key to cause a top stop, and
note where the machine stops. If the machine does not stop on top, the operator should return the
keyswitch to the PROG position whereupon the display will allow entry of a new stopping angle
(in RUN mode no configuration data can be entered). If the machine went over top, the operator
should enter a smaller angle value (earlier in stroke). If the machine stopped short of top, the
operator should enter a larger angle (later in stroke). After entering a new angle the keyswitch
can be returned to the RUN position to test the stopping point again. (Note that after switching
back to RUN mode it will be necessary to clear the E-Stop condition by pressing the CLEAR
key). By switching between Run and Program modes and entering data, the stopping angle can
be fine tuned to stop the machine on top.
On variable speed machines it will often be desirable to use the speed advance capability of the
System 2500 to automatically adjust the stopping angle as the speed changes. In order for the
Topstop Speed Advance function to work properly its configuration data must be programmed
(see Section 2.5.4). The top stop fine tuning procedure just described can be used to find the
stopping angle of the machine at various speeds so this information can be entered into the
Topstop Speed Advance configuration. Once the Topstop Speed Advance data has been
recorded, the stopping angle itself can then be programmed as 'Advanced' so that the stop signal
will automatically occur earlier in the stroke as the speed increases. If the stopping angle is to be
programmed as advanced, the angle should be left at the setting that was found while the
machine was set for its LOWEST operating speed. This angle should be keyed in on the Topstop
display as before except that the ADVAN key should be pressed before pressing the ENTER key.
The letter 'A' will appear beside the stopping angle to designate that the angle will be advanced.
The ADVAN key should NOT be pressed while different angles are being entered during the fine
tuning process (in other words, the 'A' should not be displayed during the fine tuning process).
If it is desired to return to the Configure Menu for additional programming, be sure that the
keyswitch is in the PROG position before pressing the EXIT key. If the keyswitch is in any
position other than PROG at any step of the Configure routines other than Topstop an error
message will appear. The operator will then have to move the selector switch back to PROG and
re-enter the access code to resume the configuration functions.