External Data Release - Omron NT4S Operation Manual

Standard Mode
4.6.5

External Data Release

Key: Cursor down Shifts to the next mask variable if the cursor is located at
a single variable or at the last row variable.
Shifts to the next row variable if the cursor is located at a
variable other than the last row variable. To be able to
scroll row-by-row, the cursor must already be positioned
at the bottom (not the last) row variable.
When shifting to a new column variable, the row number
is set to 0 and the cursor is placed at the top row variable
(i.e. the first row variable).
When shifting to a single variable, the row number re-
mains unchanged.
Soft key: TabLeft Shifts to the next column on the left in the same row.
Shifts to the previous mask variable if the cursor is locat-
ed in the column at the left-most position.
Soft key: TabRight Shifts to the next column to the right in the same row.
Shifts to the next mask variable if the cursor is located in
the column at the right-most position.
Key: Page up Reduces the table offset by the number of rows scrolled
up. The row number is reduced by the corresponding
number of rows (otherwise the remaining number of
rows). Once the row number has also reached the mini-
mum value, the key is no longer effective. Shifting to an-
other mask variable in particular is not possible.
Key: Page down Increases the table offset by the number of rows scrolled
down. The row number is increased by the correspond-
ing number of rows (otherwise the remaining number of
rows). Once the row number has also reached the maxi-
mum value, the key is no longer effective. Shifting to an-
other mask variable in particular is not possible.
Key: Enter Function is the same as that of the Cursor down key, but
the variable is additionally written to the PLC.
The PLC can prevent the input of variable values by the operator using the external
data release. To be able to make use of this data release function, the following
variables must have been created:
- a variable for the Read coordination byte
- a variable for the poll area.
When the Data Release key is pressed in an I/O mask, the terminal will enable the
editing mode. If the controller has set the external data release, the status LED in
the Data Release key lights up. The external data release is controlled by bit 0 in the
first byte of the cyclic poll area of the controller (see chapter Poll Area). Data editing
is inhibited whenever the PLC sets this bit to 0. In this case, the status LED in the
Data Release key will begin to flash.
Section 4-6
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