Apple computer 3. X (formerly known as SmartPro), the version seems to have ended in version 3. 13. Codesys(Conmaker)+Citect kernel; MACSV (the original version of MACS5) is the first version of MacSV1.11.2. V is the Roman numeral five. Codesys+ self-developed upper monitoring. MACS5。 X was later called MACS5 directly. The current version seems to be MACS5.2.4, and MACS5 is very mature at present. But new projects are rarely used. The latest version of MACS6. X is 6.5.2.6.X At first, it seems to be NM series hardware for subway and nuclear power. At present, the most important thing is to cooperate with the latest KM series, referred to as K series. MACS6' s programming kernel has been greatly upgraded. It is said that it was born out of Codesys, but it was actually developed by itself. The current version of MACS4. X is 4.6.2MACS4.X is codesys+cite. MACS4 is more like an upgraded version of MACS3 in the new era, and its functions have not been significantly upgraded. There are only a few mainstream versions at present. Objectively speaking, the version planning of Hollysys is indeed more chaotic than that of Kong Zhong and Xinhua.