Omron NT15S, Руководство по эксплуатации

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65
Standard Mode
Section 4-4
4.2.1 Startup Process without a Valid User Description
The system-test performed on the application memory will detect whether a mo-
dule is missing, defective or of the wrong type. This is then indicated to the operator
by the following message:
If the memory test establishes that the right type of Flash memory is used but that it
does not contain a valid user description, the Flash memory will be erased and the
terminal will automatically switch to the download operating mode. The following
messages appear on the display indicating the various phases:
The message ‘DOWNLOAD 1’ remains on the display to indicate that the terminal
is now ready to receive a valid user description via the download interface.
Until the memory contains a valid user description, communication with a controller
will not take place, nor will the keyboard be operational. Once a valid user descrip-
tion has been downloaded, the terminal becomes active.
4.3 Communication in the Standard Mode
In standard mode, any interface except the interfaces for the logging printer and the
parallel outputs can be used for communication between the PLC (host computer,
etc.) and the operating terminal. The interface labeling, however, always depends
on the connected counter part or the network.
See relevant chapters in the manual for a more detailed description of the various
interfaces.
4.4 Operating Concept
The operating concept of the terminal has been designed to allow the operator to
access all masks - and thus all the data - quickly and easily.
A number of means are available to the user to help guide the operator through the
mask system.
4.4.1 Mask Structure
By means of the programming system, a network of I/O masks without a real hie-
rarchical structure is formed. I/O masks are located at the nodes in the network and
contain a selection field which is used to call up other masks by their names. It is
possible to access any other I/O mask from an I/O mask by using the control and
function keys.