bids are invited for siemens-simatic step-7 winccupgraded - supply of up gradation of existing siemens simatic step-7 software and wincc software to latest version :the upgraded software ( step-7 and wincc ) shall be supplied with valid licences. the upgraded step-7 and wincc set shall be installed in plc_pc system at ftp-2, ftp-4 and ahs.note:1. the vendor must be siemens ltd. or authorised by siemens for plc automation products and services. the authorisation letter from siemens must be submitted by the vendor along with their offer for evaluation.2. vector may visit our site to understand the details of project and nalcos requirement before submitting the offer.3. deatail specification of the item is as per nit. , service portion - installation & commissioning of the upgraded system keeping the existing process intact as specified in nit total quantity : 1