Omron NT31

644
Specifications
APPENDIX A
Display Restrictions
Apart from the restrictions on the maximum number that can be displayed, the following restrictions apply to individ-
ual elements.
S Restrictions on data reading
With NT31/NT31C, the maximum quantity of data that can be read simultaneously is fixed, and elements that
exceed this data quantity limit are not displayed on the screen. Note that even if the same data is read from differ-
ent elements, each instance is counted separately.
The table below shows the maximum data quantities for each type of read data.
Item Maximum data quantity
Host bit 1024
Numeral memory tables 1024
Character string memory tables 1024
Bit memory tables 1024
Memory table indirect references 100
Background memory tables 128
The data quantity restrictions for each type of element read are indicated in the table below. Ensure that the totals
for a displayed screen are within the range restrictions indicated above.
Element Restriction on Read Data
Fixed displays (text, graphics) None
Image data None
Library data None
Marks None
Touch switches Zero to two host bit (number of host bits set with touch switch property)
Lamps One host bit
Numeral inputs One numeral memory table
Character string inputs One character string memory tables
Thumbwheel switches One numeral memory table
Numeral displays Direct specification One numeral memory table
Indirect specification One numeral memory table
One memory table indirect reference
Character string displays Direct specification One character string memory table
Indirect specification One character string memory table
One memory table indirect reference
Bar graphs One numeral memory table
When numeral memory tables are designated for each of the “−100%”, “0%”, and
“100%” settings for each graph line, one numeral memory table is read for each of these
settings.
Analogue meter One numeral memory table
When numeral memory tables are designated for each of the “−100%”,“0%”, and
“100%” settings for each graph line, one numeral memory table is read for each of these
settings.
Broken line graphs Number of numeral memory tables determined by “number of graph lines” “number of
vertices”
When numeral memory tables are designated for each of the “−100%”, “0%”, and
“100%” settings for each graph line, one numeral memory table is read for each of these
settings.