Downloading The User Description; Project Back-Up; Optimizing The Transmission Rate - Omron NT4S Operation Manual

Standard Mode

4.27.5 Project Back-up

4.27.6 Optimizing the Transmission Rate

4.28

Downloading the User Description

180
A project is backed up by storing the source files onto various data mediums, as
recommended by the PC manufacturers. For information on the available options
refer to your PC's operator system manual.
In addition, we recommend that the projects are printed using the documentation
functions.
The operating concept supports free access to various data types and data
lengths.
Although, the extent to which the various protocols actually support this free access
varies greatly. The firmware of the terminal optimizes the access method mask-
specifically to achieve extremely short access times.
This method means that an attempt is made to transmit several variables to the
display simultaneously. The user can actively contribute to this process by keeping
the number of different variable types used in one mask to a minimum and by
addressing variables of one type contiguously (small gaps are no problem!). This
allows shorter refresh intervals and reduces the load on the interface.
The download function describes how a new project is loaded into the terminal's
Flash memory. Before a new project can be downloaded, the terminal must be
placed into the download mode.
The download mode is activated by:
- Writing a '1' to the system variable IntEraseEPROM in an I/O mask.
- Switching off the supply voltage, setting the user-mode switch S4 to ON,
turning the device back on and once the following message is displayed
switching the user-mode switch S4 to OFF again with the power on.
While programming, you may want to activate the automatic download function.
This will automatically switch the operating terminal into the download mode when-
ever a download is started on the PC.
When the download function is activated, the user description currently stored in
the terminal will be erased and the following information will appear on the display
at the cursor position (1.1):
A new user description can now be transferred to the terminal using the Project
Management dialog in the programming system. For this process, the PC must be
connected to interface channel SER2 of the terminal using the download cable.
To prevent the user description from accidentally being erased during operation, it
is possible to assign an appropriately high access level to the mask with the down.
Section 4-27