Applies To:
  • CitectSCADA 1.00 1.01 1.10 1.11 1.20 2.00 2.01 3.00

Question: I want to connect my Citect system to a UNIX or VMS mainframe on an ethernet network and use it as a mass-storage device for all my files. How can this be done? 

Connecting to UNIX or VMS machines usually means having TCP/IP support on your DOS machine for your ethernet network. One of the best ways to achieve this is to use Windows for Workgroups 3.11 and get a copy of Microsoft TCP/IP-32 driver, which can be installed in windows and co-exist with the other network protocols. This provides the basic pathway from your machine to the mainframe and communications can be tested using the supplied utility called PING. PING allows you to bounce packets off another machine (or your own) and will give you information about the time taken. This can be used to verify that the TCP/IP layer is communicating to another machine at this level.

The next step is to find a package that supports NFS (or Network File System) under DOS. There are several versions of NFS, so you should get exact details about the NFS your mainframe runs before deciding on a package. There are several packages available which allow you to mount and unmount NFS network drives on a DOS system, and some which are totally integrated with Windows for Workgroups.

Once the NFS is set up, the drive can be used as you would a normal network drive, and operation of the NFS should be almost transparent to Citect.