170
Memory Tables and Bar Graphs
Section 5-2
Application Example of the Numeral Memory Tables Allocated to the PC Words
This example gives the procedure to directly display the contents of the words allo-
cated as the numeral memory tables in the PC memory. The NT20S screen dis-
play will change as the contents of the PC word change.
S Support tool settings
Allocate the memory as shown below by using the support tool.
Numeral memory table entry #1: DM0000 (allocated words: 2 words)
Numeral memory table entry #2: DM0002 (allocated words: 1 word)
Screen numbers to be created: #1 and #2
Line 1
Qty. 15289 units
Defects 23 units
Numeral memory
table entry #1
(8-digit input)
Numeral memory
table entry #2
(4-digit input)
S PC ladder program
Create a PC ladder program as follows:
INC(38)
DM0000
00100
INC(38)
DM0001
(1)
Word for least significant 4 digits of #1
@INC(38)
DM0002
(2)
Word for most significant 4 digits of #1
(3)
Word for #2
25506 (=)
00001
DIFU(13)
00100
25502
(1 second clock)
S Program operation
(1) The contents of word DM0000 are incremented by 1 each second. The value
displayed on the NT20S in numeral memory table entry #1 increases by 1
each second.
(2) When the counter in (1) above causes an increase in the most significant dig-
its, the contents of word DM0001 are incremented by 1 each second. The val-
ue displayed on the NT20S in numeral memory table entry #1 most significant
digits increases by 1.
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