From: Jesper Quorning <jquorning@hotmail.com>
Subject: Re: Ada in command / control systems
Date: Mon, 25 Feb 2019 13:18:28 -0800 (PST)
Date: 2019-02-25T13:18:28-08:00 [thread overview]
Message-ID: <a9e95da8-9923-4be6-98f2-30913f0a5274@googlegroups.com> (raw)
In-Reply-To: <q508nv$gnb$1@gioia.aioe.org>
On Monday, February 25, 2019 at 9:24:33 AM UTC+1, Dmitry A. Kazakov wrote:
> Because the PLC marked is dominated by vendors pushing their vendor-lock
> solutions, e.g. Siemens.
Siemens is the Apple of the industrial world. They have to lock the hardware to keep up the quality of service.
> Another reason is the customers lacking elementary programming and
> software design skills. They are usually technicians and electrical or
> mechanical engineers.
I would say that software engineering is not about knowing everything about programming. it is more about not doing things which is outside your competences until you are competent enough to use the feature.
Concurrency has been done with single CPU since forever with finite state machines (FSM) and cyclic executing. The PLC is not at primitive beast. It is a platform with logs, priority scheduling, interrupt handling functionality on nearly everything from program errors to hardware errors, communication errors and you can inspect the program states on the fly (online debugging). Safety is very important as the lives and economic interests of humans are at stake.
Jesper.
next prev parent reply other threads:[~2019-02-25 21:18 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-25 6:51 Ada in command / control systems Jesper Quorning
2019-02-25 8:24 ` Dmitry A. Kazakov
2019-02-25 9:44 ` Jesper Quorning
2019-02-25 15:54 ` Dmitry A. Kazakov
2019-02-25 13:50 ` russ lyttle
2019-02-25 14:29 ` gautier_niouzes
2019-02-25 15:25 ` Simon Wright
2019-02-25 19:21 ` russ lyttle
2019-02-26 4:50 ` J-P. Rosen
2019-02-26 15:50 ` Simon Wright
2019-02-26 22:10 ` lyttlec
2019-02-26 22:39 ` Niklas Holsti
2019-02-26 23:09 ` Simon Wright
2019-02-27 13:22 ` russ lyttle
2019-02-27 14:17 ` Niklas Holsti
2019-02-27 17:49 ` russ lyttle
2019-02-25 19:53 ` Tero Koskinen
2019-02-25 20:15 ` russ lyttle
2019-03-01 14:56 ` fabien.chouteau
2019-03-01 16:58 ` Simon Wright
2019-03-01 21:19 ` russ lyttle
2019-03-01 22:32 ` fabien.chouteau
2019-03-01 23:24 ` russ lyttle
2019-02-25 21:18 ` Jesper Quorning [this message]
2019-02-26 9:28 ` Maciej Sobczak
2019-02-26 11:01 ` Dmitry A. Kazakov
2019-02-26 21:25 ` Maciej Sobczak
2019-02-27 9:33 ` Dmitry A. Kazakov
2019-02-27 20:46 ` Maciej Sobczak
2019-02-27 21:55 ` Dmitry A. Kazakov
2019-02-28 13:12 ` Maciej Sobczak
2019-02-28 17:43 ` Dmitry A. Kazakov
2019-03-01 9:22 ` Maciej Sobczak
2019-03-01 10:46 ` Dmitry A. Kazakov
2019-03-04 7:03 ` Maciej Sobczak
2019-03-04 14:38 ` Dmitry A. Kazakov
2019-03-05 9:33 ` Maciej Sobczak
2019-03-05 16:09 ` Dmitry A. Kazakov
2019-03-06 9:05 ` Maciej Sobczak
2019-03-06 14:14 ` Dmitry A. Kazakov
2019-03-07 7:02 ` Maciej Sobczak
2019-03-07 9:25 ` Dmitry A. Kazakov
2019-03-08 7:19 ` Maciej Sobczak
2019-03-08 11:08 ` Dmitry A. Kazakov
2019-03-08 17:00 ` Simon Wright
2019-03-08 17:38 ` Dmitry A. Kazakov
2019-03-05 7:18 ` G. B.
2019-03-05 9:28 ` Dmitry A. Kazakov
2019-03-05 9:51 ` Maciej Sobczak
2019-03-05 16:15 ` Dmitry A. Kazakov
2019-03-06 22:02 ` Randy Brukardt
2019-03-05 17:55 ` Niklas Holsti
2019-03-05 21:06 ` Simon Wright
2019-03-06 7:26 ` G. B.
2019-03-06 8:22 ` Dmitry A. Kazakov
2019-03-06 12:04 ` Simon Wright
2019-03-07 7:35 ` G. B.
2019-03-07 9:25 ` Dmitry A. Kazakov
2019-03-06 9:17 ` Maciej Sobczak
2019-03-08 22:45 ` russ lyttle
2019-03-09 8:16 ` Simon Wright
2019-03-09 8:59 ` Dmitry A. Kazakov
2019-03-09 18:47 ` russ lyttle
2019-03-09 20:06 ` G.B.
2019-03-09 20:38 ` Dmitry A. Kazakov
2019-03-09 18:34 ` russ lyttle
2019-03-09 19:28 ` Simon Wright
2019-03-10 21:13 ` lyttlec
2019-03-11 8:56 ` Simon Wright
2019-03-11 14:27 ` russ lyttle
2019-03-11 17:01 ` Simon Wright
2019-03-11 21:55 ` russ lyttle
2019-03-05 11:59 ` russ lyttle
2019-03-05 18:18 ` Dmitry A. Kazakov
2019-03-06 2:01 ` lyttlec
2019-03-06 8:29 ` Dmitry A. Kazakov
2019-02-26 15:54 ` Simon Wright
2019-02-26 21:43 ` Maciej Sobczak
2019-02-26 22:45 ` Simon Wright
2019-02-27 8:41 ` Dmitry A. Kazakov
2019-02-27 20:55 ` Maciej Sobczak
2019-02-27 21:26 ` Simon Wright
2019-02-27 22:08 ` Dmitry A. Kazakov
2019-02-27 11:04 ` Jesper Quorning
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