From: Jesper Quorning <jquorning@hotmail.com>
Subject: Re: Ada in command / control systems
Date: Mon, 25 Feb 2019 01:44:21 -0800 (PST)
Date: 2019-02-25T01:44:21-08:00 [thread overview]
Message-ID: <f9ca106d-2de3-4666-b702-7f5b5145d7bc@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.
Is this so different from Ada suppliers?
There are also vendors like Beckhoff (lightweight PLCs) using open standards.
> Another reason is the customers lacking elementary programming and
> software design skills. They are usually technicians and electrical or
> mechanical engineers.
Therefore, Ada is such an advantage. I myself am not a very good programmer, so Ada would help me not be called at 3 am with a production line that does not work somewhere in a remote timezone.
In SPS systems, we do not like dynamic memory allocation, so maybe SPARK without a tasking would be sufficient for many applications. The languages used already do what they can to limit the programmer to not make too many mistakes.
Technicians and engineers are people too. They try to do what they can with the training af tools they have.
> > It looks like there are elements of Ada in it.
> Is it a joke?
No, it's not a joke.
For me, it seems that Ada was considered when SCL was designed, but was considered too abitious. Ada is a much better language than SCL, which is Pascal-like. Small things like "=>" and "-" comments are used for online inspection. Also END_IF and END_CASE looks like Ada influence.
> 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.
SPS was also considered dead 20 years ago. However lots of new systems are put into operation every single day. The SPS market is very conservative. When a customer signs an acceptance test he expects the program to be working flawlessly for 15+ years (in principle).
Venders has tested and time-tested solutions with many documentation and spare parts delivery systems worldwide. Hobbyist does not have that.
Jesper.
next prev parent reply other threads:[~2019-02-25 9:44 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 [this message]
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
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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