Omron NT20S Operation Manual page 183

Memory Tables and Bar Graphs
Setting the Words of the Character-String Memory Table
164
This specification method is a little complex, but it allows the display to be changed
more easily according to the circumstances. In the example above, if 1 were add-
ed to the contents of memory table 20 to give 52, the contents of memory table 52
would be displayed instead.
The memory tables used for display can also be allocated to areas in the PC, so
that the display can also be changed in response to changes in the data to be dis-
played (i.e., the contents of character string memory table 51 in the example
above).
However, in comparison with direct specification, indirect specification requires
more time for processing.
When creating the screen data by using the support tool, make the following set-
tings for each numbered character string:
S Initialization setting
Set whether or not the PC words are initialized with the character-string memory
table initial value registered to the screen data memory when the main power
supply is turned ON or reset.
S Number of registration words
Set the number of words within 16 words required for registering the character-
string data. One word can store two normal-size characters.
S Setting the words for the character-string memory tables
The character-string memory tables can be allocated to the following PC words.
Set the word type and the first word.
Symbol C Series PCs
DM Data Memory
CH Internal/Special Relay
TIM Timer
CNT Counter
HR Holding Relay
AR Auxiliary Relay
LR Link Relay
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.
If the "number of registration words x 2" ("word setting window") set with the sup-
port tool is larger than the "number of character digits" ("character-string display
setting" window), the character string may be broken halfway.
The range of respective area varies with the type of PC. Refer to Appendix L PC
Memory Map (page 278).
Allocated CVM1/CV Series PCs
f
Data Memory
f
Internal/Special Relay
Timer
Counter
f
–
f
Auxiliary Relay
f
–
Section 5-2
Allocated
f
f
f: OK
: NG