LINK Systems System 2500 PLS - Manual (Page 25)

System 2500 Operating & Installation Manual - Revision 07 2-17
while the cursor is on the top line. Using the arrow keys the operator can 'scroll' through all the
lines of data that must be entered. (The only exception to data entry is the MAX SPEED shown
on the first screen. MAX SPEED is for display only and cannot be entered on the Topstop Speed
Advance screen. To change the value of MAX SPEED the operator must go to the MOTION
DETECTOR data screen, Section 2.5.2).
All speed advance data must be entered for proper operation. The data must be entered correctly
or an error will be generated. This means that the minimum press speed obviously must be less
than the maximum speed, and for each increasing speed value the stop angle programmed must
decrease (must occur earlier in the stroke). After all data has been entered, programming of
Topstop Speed Advance is complete. Thereafter if the stopping angle has been programmed as
Advanced (see Section 2.5.3), the angle will be adjusted according to this data. As the speed
increases, when a top stop is required the E-Stop relay will actually open earlier in the stroke than
at the Topstop angle that is programmed. Since this function is for advancing the stopping angle,
the angle entered for Topstop should be left programmed for proper operation at minimum
machine speed.
2.5.5 RESTRICTED CHANNELS
It may be desired to 'lock' the on/off setpoints on a PLS channel so that they cannot be changed.
In the System 2500 PLS this is called a restricted channel. Channels one thru eight can be
restricted channels. If a channel is restricted, its setpoints cannot be erased or edited nor can any
new setpoints be added. Additionally, a restricted channel cannot be changed with regard to
special functions as follows:
1. Restricted channels cannot be tied to the counter. If a channel previously tied to
the counter is then restricted, it cannot be removed from being tied to the counter
unless the restricted status is removed (see Section 2.4.3.3).
2. Restricted channels cannot be assigned as the special fault output for the Cyclic
mode of Die Protection. If a channel previously assigned as the fault output is
then restricted, the fault output cannot be reassigned to another channel unless the
restricted status is removed from the previously assigned channel (see Section
2.9.2).
3. Channels 7 and 8 cannot be restricted if the unit is configured for Automatic
Single Stroke operation. These output channels are reserved for a special purpose
when Auto Single Stroke is used (see Section 2.8.4).
After selecting RESTRICTED CHANNELS from the Configure Menu, the LCD will display the
list of currently restricted channels. In order to restrict a PLS channel that is not on the list the
operator must press the ADD key, then the channel number desired (1-8), then the ENTER key.