Tuesday, December 7, 2010

Weighing Machine Using PLC Keyence




PLC Type KV-16, Name Input / Output PLC :

INPUT PLC :
0000 ; Sensor Object
0001 ; Sensor for empty containers
0002 ; Sensor for detection position of the Rotary container
0003 ; Weighing : GO/OK

OUTPUT PLC :
0500 ; Output to Yellow Lights for the Empty
0501 ; Output to Red Lights for Weighing Not OK
0502 ; Output to Green Lights for Weighing OK
0503 ; Output to Contactor for Electric Motor
0504 ; Weighing : Digital Zero Reset


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


Reading Ladder PLC Programming for Weighing Machine using PLC Keyence :

Step 1 :
ALL Process ON/OFF
a.If 0000 = ON Then 1000 = ON (DIFU)
b.If 1000 = ON AND 0000 = ON AND 1009 = OFF Then 1001 = ON (ALL PROCESS ON)
c.If 0000 = OFF (ALL PROCESS OFF)
d.If 0001 = OFF AND 1002 = ON Then 1009 = ON ( ALL PROCESS OFF )

Step 2 :
Red Lights = OFF
Green Lights = OFF
a.If 1000 = ON AND 1001 = ON AND 1003 = OFF Then 1002 = ON
b.If 1002 = ON Then 1007 = OFF (RES 1007 = ON) AND 1008 = OFF ( RES 1008 = ON )
c.If 1007 = OFF Then 0502 = OFF (Green Lights = OFF)
d.If 1008 = OFF Then 0501 = OFF (Red Lights = OFF)

Step 3 :
Digital Zero Reset = ON
a.If 1002 = ON AND T000 = ON AND 1001 = ON AND 1004 = OFF Then 1003 = ON
b.If 1003 = ON Then 0504 = ON (Digital Zero = ON)

Step 4 :
Rotary container = ON / OFF
a.If 1003 = ON AND T001 = ON AND 1001 = ON AND 1005 = OFF Then 1004 = ON (Hold ON)
b.If 1004 = ON Then 0503 = ON (Electric Motor = ON)
c.If 0002 = OFF AND 1004 = ON AND 1001 = ON AND 1005 = OFF Then 1010 = ON (Check Sensor position = OFF)
d.If 1004 = ON AND 0503 = ON AND 1010 = ON AND 0002 = ON AND 1001 = ON AND 1006 = OFF Then 1005 = ON ( Electric Motor = OFF )
e.If 1005 = ON Then 1004 = OFF
f.If 1004 = OFF Then 0503 = OFF ( Electric Motor = OFF )

Step 5 :
Weighing : GO/OK = ON/OFF
a.If 1005 = ON AND T002 = ON AND 1007 = OFF AND 1008 = OFF AND 1001 = ON Then 1006 = ON (Judgment OK/NOT OK)
b.If 1001 = ON AND 1006 = ON AND 0003 = ON Then 1007 = ON (SET 1007 = ON) =>Weighing OK
c.If 1001 = ON AND 1006 = ON AND 0003 = OFF Then 1008 = ON (SET 1008 = ON) =>Weighing NOT OK
d.If 1007 = ON Then 0502 = ON (OK)
e.If 1008 = ON Then 0501 = ON (NOT OK)

Step 6 :
Empty Containers
a.If 0001 = OFF AND 1002 = ON Then 1009 = ON (ALL PROCESS OFF)
b.If 0001 = ON Then 0500 = ON (Yellow Lights = ON)

Please Download Programming for KV Builder :
Weighing Machine using PLC Keyence

See : Weighing Machine


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