Saturday, December 25, 2010

Weighing Machine Using PLC Mitsubishi




PLC Type FX, Name Input / Output PLC :

INPUT PLC :
X000 ; Sensor Object
X001 ; Sensor for empty containers
X002 ; Sensor for detection position of the Rotary container
X003 ; Weighing : GO/OK

OUTPUT PLC :
Y000 ; Output to Yellow Lights for the Empty
Y001 ; Output to Red Lights for Weighing Not OK
Y002 ; Output to Green Lights for Weighing OK
Y003 ; Output to Contactor for Electric Motor
Y004 ; Weighing : Digital Zero Reset


Download PDF File:
Weighing Machine Using PLC Mitsubishi(.pdf)


Reading Ladder PLC Programming for Weighing Machine using PLC Mitsubishi :

Step 1 :
ALL Process ON/OFF
a.If X000 = ON Then M0 = ON (PLS)
b.If M0 = ON AND X000 = ON AND M9 = OFF Then M1 = ON (ALL PROCESS ON)
c.If X000 = OFF (ALL PROCESS OFF)
d.If X001 = OFF AND M2 = ON Then M9 = ON ( ALL PROCESS OFF )

Step 2 :
Red Lights = OFF
Green Lights = OFF
a.If M0 = ON AND M1 = ON AND M3 = OFF Then M2 = ON
b.If M2 = ON Then M7 = OFF (RST M7 = ON) AND M8 = OFF (RST M8 = ON)
c.If M7 = OFF Then Y002 = OFF (Green Lights = OFF)
d.If M8 = OFF Then Y001 = OFF (Red Lights = OFF)

Step 3 :
Digital Zero Reset = ON
a.If M2 = ON AND T000 = ON AND M1 = ON AND M4 = OFF Then M3 = ON
b.If M3 = ON Then Y004 = ON (Digital Zero = ON)

Step 4 :
Rotary container = ON / OFF
a.If M3 = ON AND T001 = ON AND M1 = ON AND M5 = OFF Then M4 = ON (Hold ON)
b.If M4 = ON Then Y003 = ON (Electric Motor = ON)
c.If X002 = OFF AND M4 = ON AND M1 = ON AND M5 = OFF Then M10 = ON (Check Sensor position = OFF)
d.If M4 = ON AND Y003 = ON AND M10 = ON AND X002 = ON AND M1 = ON AND M6 = OFF Then M5 = ON ( Electric Motor = OFF )
e.If M5 = ON Then M4 = OFF
f.If M4 = OFF Then Y003 = OFF ( Electric Motor = OFF )

Step 5 :
Weighing : GO/OK = ON/OFF
a.If M5 = ON AND T002 = ON AND M7 = OFF AND M8 = OFF AND M1 = ON Then M6 = ON (Judgment OK/NOT OK)
b.If M1 = ON AND M6 = ON AND X003 = ON Then M7 = ON (SET M7 = ON) =>Weighing OK
c.If M1 = ON AND M6 = ON AND X003 = OFF Then M8 = ON (SET M8 = ON) =>Weighing NOT OK
d.If M7 = ON Then Y002 = ON (OK)
e.If M8 = ON Then Y001 = ON (NOT OK)

Step 6 :
Empty Containers
a.If X001 = OFF AND M2 = ON Then M9 = ON (ALL PROCESS OFF)
b.If X001 = ON Then Y000 = ON (Yellow Lights = ON)

Please Download Programming for GX Developer :
Weighing Machine using PLC Mitsubishi

See : Weighing Machine


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