If you are working in programing, then the salary you are getting is surprisingly low.
Please give further details of your job, skillset and position
However, to answer your direct question - State Government issues a notification every 6 months giving the amount of minimum wages payable for each zone (4 zones in TN), Skill Category and Industry. You need to look at the latest notification and identify the relevant salary levels.
Please remember that the notification talks only in terms of Basic + DA. So your Basic + Da in your salary must be above the minimum limit specified in the notification. If you have other allowances in your salary, they are not to be counted for this purpose.
4th June 2014 From India, Mumbai