The following is from the manual (hope it helps):
Remote Mounted disk
2.1 Overview
Remote mounted disks enables the user to access files stored on a disk. The external
computer has NFS or FTP server software running, which will enable the robot to
access the files on its disks.
Since several robots can access the disk of the same external computer, the PC disk can
be used as a backup storage for robot programs, system parameters etc.
2.2 Server and local path
The files on the disk are exported by the NFS/FTP server running on the external computer.
They are exported under a name that can be setup on the server. The ‘C’ drive on
a PC can for example be exported under the name ‘/C’.
This name should be entered in the system parameters in the Server Address parameter.
Note that the server does not have to export the whole disk but can export a sub-tree of
a disk. E.g. c:\rbt_backup can be exported as /c/rbt_backup.
The Local Path parameter specifies the name of the mounted unit on the robot. This
name is displayed on the teach pendant in the list of units together with the “ram1disk:”
and “flp1:” unit. It is also used in the RAPID programming language for accessing
files.
See the User’s Guide for information about how to change parameters.
Example
Assume that the external computer exports the sub directory c:\robot as /c/robot and
that a robot system mounts this disk as pc:.
The file c:\robot\robot.prg can then be accessed as pc:/robot.prg on the robot.
2.3 Error handling
The S4 robot controller periodically checks the connection to the server. The behaviour
when the connection is lost can be controller by changing the Trusted flag in the system
parameters.
Non-trusted units
If the flag is set to No, a warning will be generated reporting that the server has gone
down. Accessing the unit after the error message has been given will result in an error.
Trusted units
If the flag is set to Yes, an error will be generated, the RAPID program will stop, and
the controller will switch to the motors off mode.
2.4 Authorisation
2.4.1 NFS
The NFS protocol specifies a way of authorising the user to access a specific server.
These parameters are setup using the User ID and Group ID parameters.
If these parameters are not used, which usually is the case on a PC, set them to the
default value 0.
Note that these two parameters must be the same for all mountings on one robot
controller.
2.4.2 FTP
FTP makes it possible to control the access to the server. The user must have an account
to log in on the server. The account specifies username and a password.
Note that the password will be visible on the TPU and in the configuration file, sio.cfg.
2.5 Software on external computer
The external computer needs the following software:
• TCP/IP stack
• NFS or FTP Server
2.6 Limitations
• In the 3.0 version of controller software, only one disk may be mounted.
See the User’s Guide for information about how to change parameters.