STEP 7 Professional V15.1 2017 SR1 Combo with TIA Portal - Siemens (SIMATIC STEP 7) - STEP 7 Prof. 2017 SR1/V15.1 Combo FL - contains Engineering software + Floating license for 1 user + Software; Documentation on DVD + License key on USB stick - Order code 6ES78105CC120YA5 - replaces 6ES7810-5CC11-0YA5