Trebor 50U Maxim - Manual (Page 23)

MAXIM 50E/U PUMP OPERATION / MAINTENANCE MANUAL PAGE 23
4.10 MAXIM PUMP LADDER LOGIC CONTROL EXAMPLE
The following sample ladder logic is provided as a reference to assist in customer
programming of a PLC for either pneumatic oscillation or optic end-of-stroke
pump control. Your PLC may require different ladder logic.
4.10.a Oscillator Control (No Probes Required)
M8002 IS ON DURING 1RST SCAN
!
M8000 IS ON WHEN PLC IS POWERED & RUN MODE
!
!M8002
!
0 +-I I--------------------------------------------------------[SET
M8028]+
!ON
10MS !
!PLS
CLOCK !
!
!
!
!
!M8000 X0
K100 !
3 +-I I---I I--------------------------------------------------------
(T42 )+
!PLC CTRL
OSC !
!ON
SPEED !
!
!
!
!
!M11 Y1
!
8 +-I I--------------------------------------------------------------(
)--+
!ON A
PUMPA !
!
!
!
!
!M12 Y2
!
10 +-I I--------------------------------------------------------------(
)--+
!ON B
PUMPB !
!
!
!T42
!
12 +-I I--------------------------------------------------------[ALT
M10 ]+
!OSC
!