GBC Stl1000 - Manual (Page 12)

11
4. Theory of Operation of the STL-1000
Conditions at Power up of the STL-1000
1.
Closing guard must be closed to actuate the closing guard interlock switch IS-1. IS-1 has
two switches in one housing.
A. One side of the IS-1 breaks main power to the E-stop.
B. The other side of IS-1 is used to monitor 24 volts to the P.L.C. at X7
Which shouldn’t be illuminated.
2.
P.L.C. is in ready condition should have at least X0, X13 and Y12, or Y13.
Conditions After Power up of the STL-1000
1.
Series of events after the depression of the foot switch (FS).
A. X6 on the P.L.C. will illuminate.
B. Y2 to energize Sol-2 (pusher) to advance book to closing area.
C. Y6 to energize 1CR to turn on 1M (feed motor) to feed element to be cut.
D. Y10 to energize 3CR to turn on 3M (belt) to advance element is cut.
2.
During element feed cycle:
A. Either the signal from X4 (count prox 2:1) or X10 (count prox. 3:1) will be used
to count the number of element legs to the number entered into the keypad.