Omron NT-SERIES - SUPPORT TOOL FOR WINDOWS V4, Operation Manual

Page: 209 / 594

6-4 Section Data Input
193
Example:
When 1200 is set for the Maximum and 201 is set for the Minimum, if the initial
value is a 3-digit value, the setting value can be changed only in the range of 201
to 999, and if the initial value is a 4-digit value, the setting value can be changed
only in the range of 1000 to 1200.
This is because the limit check function detects an error if the most significant
digit value is changed from 0 to 1 or from 1 to 0.
To avoid this problem, set the maximum and minimum limits so that n...n
y m...m
or provide a touch switch separately to write a value at carry over or shift to the
lower digit.
3. With the NT21, NT31, NT31C, NT631, and NT631C, when hexadecimal val-
ue is input, it is regarded as signed binary data and upper/lower limit check is
performed. Therefore, if the top bit is 1, it is regarded as negative value and
input will be prohibited when the minimum limit was set as 0. In this case, set
those value such as $80000000 (–2147483648) for minimum limit setting to
prevent it from being checked.