https://nagimov.me/tags/ics/Recent content in ICS on Spaghetti Code with BeerHugo -- gohugo.ioen-USThu, 03 Oct 2019 19:41:14 -0700https://nagimov.me/post/the-horror-of-plc-programming/Thu, 03 Oct 2019 19:41:14 -0700https://nagimov.me/post/the-horror-of-plc-programming/Consider this simple code snippet… 10 VALVE1_POS = S405_VH(1400) 20 VALVE2_POS = 80.0 30 IF VALVE1_POS > 50.0 THEN VALVE3_POS = 99.5 ELSE VALVE3_POS = 0.5 …and let me follow your observations: you notice a weird line enumeration, just like in good old BASIC, you see three variables, VALVE1_POS, VALVE2_POS and VALVE3_POS, you find S405_VH(1400) most likely to be a function call retrieving a position of the valve 1, position of the valve 2 is set to 80.