Omron NT20S Operation Manual page 185

Memory Tables and Bar Graphs
Setting the Words of the Numeral Memory Table
166
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 one were
added to the contents of memory table 18 to give 63, the contents of memory table
63 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 62 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 numeral:
S Initialization setting
Set whether or not the PC words are initialized with the numeral 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 2 words required for registering the numeral
data. One word can store up to 4 digits. Two words can store up to 8 digits.
S Setting the words for the numeral memory tables
The numeral 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.
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
–
f: OK
: 1 word only
Section 5-2
Allocated
f
f
: NG