Omron NT620S Operation Manual page 178

Numeral Setting
4-8-5 How to Use a Thumb Wheel Type
Entering the Numeric Values
166
For numeral setting of thumb wheel type, a numeric value is entered by directly
touching the increment/decrement (+, –) keys. Keys such as ten-key are not re-
quired.
The numeric values are entered using the increment/decrement (+, –) keys pro-
vided at each digit.
• Specifying the numeric values
When the increment/decrement (+, –) key is touched, the numeric value at that
digit will increase/decrease by "1". Each time "+" or "–" key is touched, the nu-
meric value just changed is notified to the PC. It is not necessary to press the
RETURN ( ) key unlike the ten-key type.
Thumb wheel numeric value setting
1 2 3 4
Press
2 2 3 4
Numeric value increases by "1".
A numeric value cannot be entered into the thumb wheel type from the ten-key.
• Changing signs
In case of sign display setting, the sign "+" is specified by touching the "+" key of
the digit for which the sign is displayed and the sign "–" by touching the "–" key.
• Checking the upper/lower limits
Upper/lower limits are checked when pressing the increment/decrement (+, –)
keys. If it is found that an input numeral value is in excess of the limit as a result
of checking, the contents of the numeral memory table (previous value before
pressing the increment/decrement (+, –) keys) is displayed again, but this is
not 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 x m..m, or create anoth-
er touch switch and write values to it when digits are carried up or down.
Section
Numeral Memory Table
1234
2234
4-8
PC