Omron NT620C, Operation Manual

Page: 220 / 337

5-2 Section Memory Tables and Graphs
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tions. In addition, depending on the setting made in the “system
memory” settings of the support tool, it may not be possible to use
numbers 256 through 999.
Numeral memory table: 000 to 999 (Depending on the setting made
in the “system memory” settings of the support tool, it may not be
possible to use numbers 512 through 999).
S
Available allocation words
The PT status control area can be allocated to the following PC areas:
Symbol C Series PCs Allocated CVM1/CV Series PCs Allocated
DM Data memory
f
Data memory
f
CH Internal/Special Relay
f
Internal/Special Relay
f
TIM Timer Timer
CNT Counter Counter
HR Holding Relay
f
–
AR Auxiliary Relay
f
Auxiliary Relay
LR Link Relay
f
–
f
: OK : NG
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 327).
Procedure 1. Use the support tool to allocate the PT status control area (PC to PT) to the
PC 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.
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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 NT620S/620C reads the area sometimes when the PC is writing the set-
tings. If the “copy source memory table number” has been written first and is
changed, unexpected memory table may possibly be changed.
S
Allocated words that the NT620S/620C reads
The NT620S/620C reads the allocated words in the PC for the memory tables
which need to be displayed. Even if the copy source memory table is allocated