This document describes how to get access to data displayed on SNS
EPICS
control system screens. There currently are three ways. The first is
based on the use of
Cygwin; the second makes use of remote desktop and a VPN account; the
third
uses a Web page. Each of these approaches and an example of how to use
them
will be described in detail below.
Reliability and availability of these access alternatives are
subject on occasion to changes in the cyber security rules for the
laboratory. Cyber security considerations can require changes in
how servers and networks are managed. For example, servers
sometimes must be placed behind a firewall, making access less
convenient. Efforts will be made by the SNS controls group to
adjust to these changes so that access arrangements remain reasonable.
Responsiveness for screen display and readout updates can be
affected by load on the PV gateway, but interruptions/disruptions
should not last a long time (e.g., many minutes). If readouts are
"white" for a long time, a telephone call to investigate what is going
on is appropriate.
If problems arise unexpectedly, please contact John Munro
(382-0109), operators in the Central Control Room (576-1502), or Bill
DeVan (382-0215).
1. Download the modules for X-Windows and Network support which are
part
of the Cygwin environment and install them.
2. Get an account on the SNS server ics-srv02.sns.ornl.gov.
3. Run Cygwin which displays a DOS shell-like window (see the first screen shot below).
At the prompt enter the command
prompt> startx
This opens a second window which is part of the X-Window support.
At the command prompt enter the following sequence of commands (text strings in italics require user-specific strings such as user id and password):
ssh -X userid@ics-srv02.sns.ornl.gov
UCAMS password
startmap-remote
The last command launches the program EDM and displays the top-level operator screen. Click on the CUB symbol to bring up the top-level Conventional Facilities screen. This screen provides access to the power monitoring, site utilities, and process waste screens.
A copy of remote desktop must be installed on the Windows system to use this approach. A current version of the Cisco VPN Client must also be installed (a copy may be downloaded from SPUDS and installed). A VPN account will be required and can be requested from the laboratory Information Technology support organization (call the ORNL computer HELP Line: 241-6765). This also means the user must have a SecurID one-time password token assigned.
1. On the Windows system use the Control Panel to "Enable Remote Desktop" then select (using "Start" in lower left corner)
Programs>Communications>Remote Programs
2. With Remote Desktop connect to the remote host pecos.ornl.gov.
3. After connecting to the remote host, go to the desktop of that system, locate the short-cut for Hummingbird Exceed and double-click to start it.
4. Follow the same command sequence as above for the Cygwin X-Windows commands, starting with the ssh command.
Enter the URL
http://public.ornl.gov/diagnostics/ee/TVABus.cfm