Siemens SIMATIC 505 - Ejector Logic Diagram

Sample RLL and Logic Diagrams
B-3
B.2 Ejector Logic Diagram
Clamp
open
timer
completed?
Clamp
open
Timer
value
Load
clamp
open
timer
Eject
required?
Load
number
of
strokes
into
counter
Activate
stroke
forward
solenoid
valve
End of
stroke
reached?
Index
counter
by 1
(V)
(D)
(V)
Number
of strokes
Yes
No
Activate
stroke
return
solenoid
Ejector
home?
Enough
strokes
completed?
Next
RLL
logic
No
No Yes
Yes
No
No
Yes
Clamp
open
complete
Figur e B-2 Ejector Logic Diagram for RLL Implementation