Omron NT-series Programmable Terminal V022-E3-1 - Manual (Page 165)



  
Section 4-8

Upper/lower limit check
An upper/lower limit check is executed when the incrementing/decrementing (+,
--) keys are pressed. If the input numerical value is outside the valid range, the
data in the numeral memory table before the key was pressed is redisplayed and
notified to the host.
However, with thumbwheel type numeral setting, if the situation is such that with
an upper limit of 1n..n, and a lower limit of 0m..m (where n and m are the values
of each digit), n..n < m..m, it is not possible to carry digits upward or downward.
Example:
When the upper limit value is 1200 and the lower limit value is 201, if the initial
value has three digits the value can be changed within the range 201 to 999, and
if the initial value has four digits it can only be changed within the range 1000 to
1200.
This is because if an attempt is made to change the leftmost digit from 0 to 1, or
from 1 to 0, an upper/lower limit value check is always performed.
In order to avoid this, either set the values so that n..n
 m..m, or create another
touch switch and write values to the host when digits are carried up or down.
Restrictions and Additional Settings for Thumb Wheel Type Numeral Settings
There are the following restrictions and additional items to set when creating
thumb wheel type numeral settings.

Number of input digits for positive values when there is a sign display
When a sign display is set for a thumb wheel type numeral setting, a maximum of
7 digits can be input for positive values.
 Display size
The only size that can be specified is “medium” (two touch switch areas com-
bined to make each digit).
Note that since the touch switch mesh overlaps with the numeral display, touch-
ing the numeral display will cause the numerical value to be updated.

Shape (end plates)
Set which of the two shapes shown below will be used. One has “end plates” at
right and left sides and the other does not.
1 2 3 4 1 2 3 4
<With> <Without>

Restrictions on display attributes
The following restrictions apply to display attributes.
Character type : Wide size only (16  16 dots)
Character enlargement : Standard only
Zero suppress : No zero suppression only
See “Numerals Which can be Displayed” (page 130).