Omron NT15S, Руководство по эксплуатации

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159
Standard Mode
Section 4-12
This is not true if
-
a function key has been programmed for direct selection of a message
mask (direct selector key)
- a value greater than 0 (zero) has been entered for the message priority
In this case, the LED in this function key can not be influenced by the PLC but
is controlled entirely by the message system.
If the number of status LEDs provided by the operating terminal being used is
smaller than could be controlled here, then the excessive bits have no function.
For the arrangement of the bits for the individual status LEDs see the section on the
cyclic poll area.
To reduce transfer times, the length of the poll area should be selected such that
only the bytes required for the status LEDs are transferred.
4.12 System Parameters
All system parameters are set to default values.
They are loaded into the operating terminal together with the project created. The
system parameters contain the value settings for the:
-
General parameters
- Poll area
- Terminal clock
- Running time meter
- Message system
- Variant buffer
- Password management
- Printer interface
- Data set transfer
- Parallel outputs (optional).
4.12.1 System Parameters: General Parameters
The general parameters refer to all generally applicable functions of the operating
terminal.
-
Polling time for cyclic variables
- Screensaver settings
- Automatic download
- Symbolic addresses for: Image of the mask number
Image of the DIP switch
Read coordination byte
Table index
Keyboard image
4.12.2 System Parameters: Poll Area
System parameters for the poll area include the symbolic address of the variable,
the polling time and the size of the poll area.