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the same screen.
In remote monitoring and sharing, it is necessary to
periodically monitor the status of the manufacturing
equipment from an office using the FTP server function,
but we have now added the following two functions to
quickly capture any change or abnormality at the pro-
duction site, and for monitoring and operating the GOT
of on-site equipment without the SoftGOT.
(1) File transfer function (FTP client)
(2) *VNC Server function
*VNC: Virtual Network Computing
2.2 New functions of GOT1000 Series
2.2.1 File transfer function (FTP client)
With the conventional GOT, files for abnormality
analysis obtained by the GOT (operation logs, i.e., files
created by a logging function described later) can be
acquired using the FTP server function by a personal
computer with a network connection at the office when
an abnormality occurs at the production site, without
actually going to get the files. However, if such informa-
tion could be obtained at the same time as the abnormal-
ity occurs, the cause could be analyzed immediately.
As shown in Table 2, the new FTP client function
can transmit the files for abnormality analysis to the file
server managed at an office from the on-site equipment
side, based on the information being monitored by the
GOT. These files can then be used to analyze the
status of the manufacturing equipment and the causes,
and quickly restore the system (Fig. 1).
Table 2 File transfer function and conventional functions
Item
FTP client
Transmission
On-site GOT Office personal
trigger
Transmission
File
details
Transmission
Equipment
Timing
event,
Time period
Personal computer
Personal computer
(FTP server)
(FTP server)
Office
Office
Transmits alarm log
Transmits alarm log
file, logging file, and
file, logging file, and
operation log when
operation log when
an abnormality
an abnormality
occurs
occurs
Fig. 1 File transfer function (FTP client)
2.2.2 VNC server function
The VNC server function transmits screen images
of the on-site GOT to a remote personal computer
through the network for display by the VNC client of the
personal computer to monitor and operate the GOT.
T
ECHNICAL
FTP server
MES interface
On-site GOT
computer
File
Device value
Polling monitor-
Equipment event,
ing from the
Time period
office
Abnormality!
Abnormality!
On site
On site
GOT (FTP client)
GOT (FTP client)
R
EPORTS
With this function, both the server and client can be
generally operated. However, if operations are simulta-
neously performed at both the remote and on-site loca-
tions, it may cause unintended operation for the manu-
facturing equipment. To avoid this, the VNC server func-
tion has an operation exclusion function: as shown in Fig.
2, the GOT acting as a server exclusively manages the
operations. When the client side has operational au-
thorization, the GOT disables touch-panel operation and
enables operation only from the client side.
On site
Periodically transmits
screen image
Operation
information of mouse
GOT (VNC server)
When an on-site operator has operational authorization, only touch-panel
operation is available
When the office has operational authorization, only operation
information of the mouse is available.
Fig. 2 Authorization of VNC server function
This new function enables the GOT and hence
manufacturing equipment to be operated and controlled
remotely away from the production site, even from a
restricted-access area such as a clean room where
precision industrial products such as semiconductors
and display units are manufactured.
As shown in Fig. 3, manufacturing equipment in
different lines can be monitored and operated by one
GOT by connecting each GOT of the equipment in
multiple manufacturing systems via a network and
using the remote personal computer operation function
(VNC client) of the GOT.
Manufacturing line A
Manufacturing line A
Stopped
Stopped
Transmits the
Transmits the
screen image
screen image
GOT (VNC server)
GOT (VNC server)
Fig. 3 Combination of VNC server function and remote
personal computer operation function
3. Development of Medium-Sized Display
GT14 Model
3.1 Market demands and challenges of me-
dium-sized display
For medium-sized displays, there is increasing
demand for high-value-added functions to enable clear
Mitsubishi Electric ADVANCE June 2013
Personal computer (VNC client)
Manufacturing line B
Manufacturing line B
Displays the GOT screen
Displays the GOT screen
of manufacturing line A
of manufacturing line A
GOT (VNC client)
GOT (VNC client)
Office
11
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