LINK Systems System 2500 PLS - Manual (Page 41)

System 2500 Operating & Installation Manual - Revision 07 2-33
2.8.3.2 VIEW STATUS (for Timing Channels)
The VIEW STATUS option of the Timing Menu will display the current on or off status of all
eight timing channels. The status on any timing channel will change as the machine crankshaft
rotates provided that the channel has had on/off setpoints programmed (see Section 2.8.3.1).
2.8.4 AUTO SS (Automatic Single Stroke)
(NOTE: This choice may not appear on the Die-Prot Menu if the System 2500 was not ordered
from the factory with the Automatic Single Stroke option. If Auto SS is not displayed but it is
desired to modify the unit for Auto SS operation, contact the factory).
CAUTION! IMPLEMENTATION OF THIS FEATURE RESULTS IN AN
AUTOMATICALLY STARTING POWER PRESS WHICH MUST BE PROPERLY
GUARDED PER OSHA 1910.217 INCLUDING TABLE 0-10. SERIOUS INJURY CAN
BE CAUSED TO THE MACHINE OPERATOR OR TO OTHER PERSONNEL IF THIS
WARNING IS NOT HEEDED.
The Automatic Single Stroke feature of the System 2500 provides a way to automate production
processes that are unable to operate in continuous mode. Some automatic feed systems are too
slow to completely feed stock into position between press strokes. In other applications events
may not occur early enough in the machine stroke for the die protection to stop the machine
before die closure if a fault is detected. In either case, it is necessary to stop the machine after
each stroke, allow the feed to complete or monitored events to happen, and then make another
stroke if no fault is detected.
The System 2500 can be programmed to interact with an external control package to provide a
complete system for implementing the Automatic Single Stroke function. The System 2500 will
monitor up to eight separate events in a production process using its die protection capabilities.
Additionally, the output relays of the unit, when properly wired in combination with external
logic components, can be used to initiate a stroke of the press. Once the proper setup procedure
has been followed, one stroke is made manually by the operator. When the press comes to a stop
the system pauses for a programmable delay time and then checks that all monitored events (die
protection inputs) have successfully occurred. If the die protection inputs have not been satisfied,
the system will wait for an additional programmable delay time until the inputs are seen (or until
the timer expires and a fault is generated). When all the die protection inputs have been satisfied,
the System 2500 will initiate a new stroke automatically. On each successive stroke following,
this routine is repeated. The system will delay after stop, wait the additional programmed time
until the die protection inputs are all satisfied, and then initiate a new stroke automatically.
The Automatic Single Stroke feature of the System 2500 uses a dedicated input (terminal #33,
labeled AUTO SS ENABLE) and two PLS output relays (outputs 7 and 8) to interface with the