From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED.fn3LatRFkm9/xzEj7F2/NQ.user.gioia.aioe.org!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: Ada in command / control systems Date: Mon, 25 Feb 2019 09:24:32 +0100 Organization: Aioe.org NNTP Server Message-ID: References: <2199b15b-d704-403f-a6c4-00fab29792d5@googlegroups.com> NNTP-Posting-Host: fn3LatRFkm9/xzEj7F2/NQ.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 Content-Language: en-US X-Notice: Filtered by postfilter v. 0.9.2 Xref: reader01.eternal-september.org comp.lang.ada:55652 Date: 2019-02-25T09:24:32+01:00 List-Id: On 2019-02-25 07:51, Jesper Quorning wrote: > > Why is Ada not used on industrial programmable logic controllers (PLC) platforms? Because the PLC marked is dominated by vendors pushing their vendor-lock solutions, e.g. Siemens. Another reason is the customers lacking elementary programming and software design skills. They are usually technicians and electrical or mechanical engineers. > In the IEC 61131-3 standard, the language 'structured text' is defined. The language looks like the poor man's Ada. > > I have not worked with structured text, but with SCL (Structured Contol Language) for Siemens S7-300 / 400/1200/1500. It looks like there are elements of Ada in it. Is it a joke? > Should industrial programs not be Ada's wheelhouse? Possibly, if Ada community would pay attention to the emerging market of single board computers used at home. In about 5-10 years so-called industrial solutions will be swept away by cheap hardware and hobby software coming from the home automation toy projects. These will be far worse than awful SPS, who could think that worse were possible? But the force of mass market is overwhelming. SPS et al will suffer the same fate as workstations did. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de