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<html>
<head>
<title> Invocation </title>
</head>
<body>
<h1>Program Invocation</h1>
<p>
SICS is a client server system. This means there must be a server running
somewhere as a prerequsite for SICS operation. This server program lives on
the instrument computer. To check for its existence you need to log on to
that computer and execute the command: <b> CheckSICS</b>. If this test fails
to find the server, it can be started by typing <b>DMCServer</b> at that
computer. Please note, that this has to happen as Instrument user (
for example DMC) on the instrument computer.
</p>
<p>
The SICS clients are the programs a user interacts with. Their main purpose
is to forward commands to the server and to display the answers. A client
also implements the status display. Various clients exist for different
platforms.
</p>
<h2> DMC program Invocation on Digital Unix</h2>
<p>
On LNS DigitalUnix systems the command <b>dmccom </b> will start a command
line client. Even this is an X11 application. If it fails to start, make
use the DISPLAY variable is properly set. If not type: <BR>
setenv DISPLAY YourComputer.psi.ch:0.0 <BR> replacing the YourComputer bit with
the name of your machine. Once started up, dmccom shows a menubar, a
large list window at the top, a smaller one below, followed by an edit field
and a row of buttons at the very bottom. At the left lower corner that is a
red field which should say: Disconnected. This is a status display. In order
to make DMCCOM usable a connection to the server needs to be established.
This can be done by clicking at the DMC entry in the Connect menu. Please
allow some time for the establishment of the connection. Once this is done,
the status display at the bottom will change to the current status of the
server. Now commands can be typed into the edit field at the bottom. The
response of the server will be displayed in the top listbox. The lower
listbox will hold a history of commands typed. Commands in this list can be
reinvoked by double clicking them. By clicking on them with the right button
they can be copied into the edit field for editing.
</p>
<p>
A status display for DMC can be started by typing <b>dmcstat</b>.
</p>
<! This file will be included for all invocation sections to doc>
<h2>Accessing SICS through Telnet</h2>
<p>
SICS is able to communicate with standard TCP/IP telnet clients. Suitable
telnet clients are available on allmost all computer platforms free of
charge as part of the network software. In order to access SICS with telnet
you need to know the following five bits of information:
<ul>
<li>The name of the computer where the SICS server is running.
<li>The port number at which the SICS server lsitens for telnet connections.
<li>The login word.
<li>A valid username.
<li>A valid password for your user name.
</ul>
This information will be supplied to you by your instrument scientist if she
finds you and your cause honorable enough.
</p>
<p>
Loging in to SICS through telnet requires the following steps:
<ul>
<li>Invoke your telnet client and try to contact machine name at the port
number given. For example on a Unix or VMS this looks like:
<pre>
telnet machine.psi.ch 7654
</pre>
Of course this may differ if you use a telnet client on a different
platform.
<li> If things go well, you'll be connected to the SICS server then, though
he does not tell you about it. However, SICS will not allow you to type
commands yet. You have to login with the magic three words: <b>loginword
username password</b>. Only if you get this right, the SICS server will
print a welcome message and you may type commands to the server.
</ul>
You can logoff from the SICS server by typing <b>logoff</b>.
</p>
<h2>DMC Simulation Invocation</h2>
<p>
There exists a simulation version of the DMC instrument control program.
This is the same program as the actual control program. However, all drivers
have been replaced by simulation drivers. This means, this program does not
interact with the hardware. It can be used for training and in order to
test command files. The simulation server can be invoked with the
command <b>DMCSIM</b>. A simulation client with the command <b>dmcsim</b>.
There is no status display simulator as this could only display random
numbers.
</p>
</body>
</html>