i went connect keypad with PLC
any way to connect it
any way to connect it
the plc used is ls master k 120s(e)The reason nobody has replied to your post is that it's disappointingly vague. How is anybody possibly supposed to help you with the amount of information you've provided? What type of PLC? what keypad? What are you talking about? These are questions which should not have to be asked.
Ok, your drawing is a little confusing to me, so we both need to understand that the "pushbutton" symbols you have drawn are actually a voltage source; so for example, if you push "7" (SW8), you will have voltage output to column 4 & row 2. Assuming there's no keypad backlight, Your keypad should have 9 pins. The Common (9th pin) is missing from your drawing; this where your +24v will go. The other 8 pins will go to 8 digital inputs. you will then write your code to take a combination of row & column to make a number.the plc used is ls master k 120s(e)
type of keypad is matrix keypad
http://www.8051projects.net/keypad-interfacing/keypad-schematic.gif
i went connect it direct with plc
Example (assuming you're using ladder logic):
| |
|---| |---| |--------------------------( )------|
| col3 row2 6 |
any solution if keypad with 8 pins only ??Your keypad should have 9 pins. The Common (9th pin) is missing from your drawing; this where your +24v will go. The other 8 pins will go to 8 digital inputs. you will then write your code to take a combination of row & column to make a numbe[/CODE]
i will buy it, and it is standerdid you make this keypad, or did you buy it this way?