The PLC can be programmed using any of six IEC 61131-3 languages. The interchangeable PLCs are the same size, avoiding the need to change connecting parts or terminal bases when you upgrade. There is a choice of three plug-and-play CPUs, with memory sizes ranging from 64kb to 4MB. These can be used together, or can be integrated independently into existing automation systems. The AC500 system consists of three products PLCs, I/O modules and HMIs. James Large, product manager for automation components at ABB`s low-voltage products division, says that sales of the AC31 were hindered by the "lack of a coherent support and growth strategy". The new PLC (above) supersedes the earlier AC31 family which has had limited success in the UK since it was launched about a decade ago. Its main targets will be existing users of ABB automation equipment, such as drives and motors in particular, OEMs and systems integrators. ABB has launched a mid-range modular PLC system which, it says, will compete on cost with systems from Mitsubishi, Rockwell and Siemens.ĪBB hopes that the new AC500 system will help it make inroads into a UK market that it estimates is worth £55m.
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