Arvind rangarajan
Member
Hi,
I am working on a project where i need to automate a process that involves around 5 to 6 steps roughly. I have Radio Frequency glow discharge equipment connected to a vacuum pump. The sequence of operation goes like this,
1)close hatch after placing the equipment inside.
2)switch on vacuum pump ( acheive a pressure between 0.15-0.2 torr)
3)switch off vacuum pump when pressure drops below 0.20 torr
4)inject 50% concentration hydrogen peroxide through the valve in the hatch.
5) wait for 15minutes so that the hydrogen peroxide diffuses and spreads to all parts of the material kept.
6) start vacuum pump again and simultaneously initiate glow discharge for 10minutes
7)shut off glowdischarge and vacuum pump
8) re-pressurize the chamber by letting air inside
( all this sequence should start with a Push Button)
I will be using the following sensors ( temperature sensor, negative pressure sensor, door proximity sensor, hydrogen peroxide gas sensor, current sensor).
Please guide me on what are the things i should know about before buying a PLC for this project. Also, let me know if there are any low cost PLC kit that i could buy online. I would like to integrate the PLC with my laptop. I am just learning the basics of PLC. For your reference, i have also attached the pictures of the device that i am trying to automate.
Thanks ,
Arvind
I am working on a project where i need to automate a process that involves around 5 to 6 steps roughly. I have Radio Frequency glow discharge equipment connected to a vacuum pump. The sequence of operation goes like this,
1)close hatch after placing the equipment inside.
2)switch on vacuum pump ( acheive a pressure between 0.15-0.2 torr)
3)switch off vacuum pump when pressure drops below 0.20 torr
4)inject 50% concentration hydrogen peroxide through the valve in the hatch.
5) wait for 15minutes so that the hydrogen peroxide diffuses and spreads to all parts of the material kept.
6) start vacuum pump again and simultaneously initiate glow discharge for 10minutes
7)shut off glowdischarge and vacuum pump
8) re-pressurize the chamber by letting air inside
( all this sequence should start with a Push Button)
I will be using the following sensors ( temperature sensor, negative pressure sensor, door proximity sensor, hydrogen peroxide gas sensor, current sensor).
Please guide me on what are the things i should know about before buying a PLC for this project. Also, let me know if there are any low cost PLC kit that i could buy online. I would like to integrate the PLC with my laptop. I am just learning the basics of PLC. For your reference, i have also attached the pictures of the device that i am trying to automate.
Thanks ,
Arvind