Omron NT20S Operation Manual page 194

Memory Tables and Bar Graphs
Procedure 1. Use the support tool to allocate the PT status control area (PC to PT) to the PC
Since the special auxiliary relays of the CVM1/CV series PCs are allocated to the
system, they cannot be used for purposes other than the system use.
The range of respective area varies with the type of PC. Refer to Appendix L PC
Memory Map (page 278).
memory.
2. Register the memory tables for the numerals and character strings to be dis-
played when creating the screen data by using the support tool.
To display a character string, use "character display" and specify the charac-
ter-string memory table by using the support tool.
To display numerals, use "numeral display" and specify the numeral memory
table by using the support tool.
3. Set the copy source data to the memory table when creating the screen data
by using the support tool.
Use "table edit".
4. Create a PC program to write the copy type, copy destination memory table
number, and copy source memory table number to the "copy memory table"
setting word in the PT status control area.
S Order for writing to the PT status control area (PC to PT)
First write the "copy destination memory table number", and then, write the
"copy source memory table number" to the PT status control area (PC to PT).
The NT20S reads the area sometimes when the PC is writing the settings. If the
"copy source memory table number" has been written first and is changed, unex-
pected memory table may possibly be changed.
S Allocated words that the NT20S reads
The NT20S reads the allocated words in the PC for the memory tables which
need to be displayed. Even when a copy source memory table is allocated to a
PC word, if its contents are never displayed it will be used only at initialization.
S Use of the "copy type"
Copy will not be executed when the "copy type" is other than "0" or "1". The
memory table copy is executed only when the contents of the area are changed.
To repeat copying of the same copy source and same copy destination, write a
value other than "0" or "1" for the copy type, and then, write a correct value again.
S Copying a numeral memory table
If the display method or the number of registered words include discrepancies, a
numeral memory table may not be copied and displayed correctly.
Section 5-2
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