Frequently Asked Questions
The following sections list the questions most frequently asked regarding OPCNetView. If your
query is not answered, we would be delighted to answer it directly.
Downloading and Installing
- How long does it take to install and configure OPCNetView on a node?
It takes about one minute to perform the install. With full licence you can view investigate all OPC
connections on your network without needing to install on any other node.
- Will I need to reboot after an install?
- Do I need to install on all nodes I wish to view?
No. With the full version it is possible to interrogate OPC connections for all nodes accessible by
the client, user credentials permitting.
- How big is the OPCNetView .MSI file?
A little over 3Mb.
Purchasing and Licences
- Why are more connections being shown than I'm expecting?
There are several reasons why multiple connections may be shown between an OPC Client and Server.
Careful interpretation of what is being displayed is necessary, which may require refreshing view and
monitoring over time.
Some of the common reasons include:
- Initial connection of an OPC Client and an OPC Server or a disconnection.
- OPC Client application browsing OPC Server items
- Threading model in the OPC Client
- Windows persisting connections for performance reasons
- Does OPCNetView use packet sniffing?
OPCNetView has been deliberately designed to be passive so as not to compromise security or performance.
No packet sniffing is involved and there is no message interception or proxying taking place.
OPC processes are totally unaware of the existence of OPCNetView and are untouched by it.
- Does OPCNetView show all OPC connections?
In most circumstances.
Remaining passive has its limitations however and not peering at packets makes it impossible to report
exactly how many active OPC connections an OPC Server currently thinks it has.
OPCNetView instead reports the number of active network connections between the OPC processes which
are created and maintained by the Windows operating system.
In the vast majority of circumstances, the number of Windows network connections is the same as the number
of OPC connections between 2 remote OPC processes.
A large number of network connections reflect a large number of concurrent OPC connections.
- Can a user without Administrator access use OPCNetView?
Yes - however their view of remote views may be restricted.
A user with restricted credentials is only able to remotely interrogate nodes that have been
previously checked by a priviledged user.
- Can I purchase a site wide licence?
You can email us
and let us know some of the details
about your site. We will then provide you a quote.
- I've got an idea for an enhancement to OPCNetView. Whats the best way of getting it into a future release of the product?
with your enhancement and contact details. We’ll review your
enhancement and possibly contact you to clarify your requirements.