Omron NT620C, Руководство по эксплуатации

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5-4 Section Numeral and Character-string Setting
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5-4 Numeral and Character-string Setting
5-4-1 Notification of Numbers to the PC
This section describes how the numerical data input at an NT620S/620C is as-
certained by the PC.
In order to determine when numerical data has been input at the NT620S/620C,
the numeral setting strobe flag in the PT status notify area is used. In order to
determine the upgraded numeral memory table number, the “content upgrade
memory table” in the PT status notify area is used.
When numerical data is input at the NT620S/620C, this is automatically notified
to the PT status notify area (PT
→
PC) allocated in the PC memory as follows.
Notification of upgrade: PT status numeral setting strobe flag
turned ON (1)
Upgraded numeral table number: Stored in the “content upgrade memory
table”
When the PC reads the “content upgrade memory table” at the leading edge of
the numeral setting strobe flag, it determines the numeral memory table number
in which the numerical data that was changed at the NT620S/620C is stored.
Numeral memory table 1
PT status notify area
Allocated word (numeral table 1)
Start
Start + 1
NT620S/620C PC
12345678
Currently displayed screen
PT status
Content upgrade
memory table
Table No.
Numeral
setting strobe
flag
12345678
12345678
[“Content upgrade memory table” in the PT status notify area and PT status]
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit
– 0 – – – 0 0 –
Word
m+1
15 14 13 12 11 10 9 8 7 Bit
PT status notify bits
0 0 0 0 0 0 0
PT status
Numeral memory table No. : 000 to 999
m+2
Numeral setting strobe flag
Content upgrade memory table
PT status
0
Numeral memory table No. (3-digit BCD)
Data is written to the content upgrade memory table as three digits of BCD
(binary coded decimal) data.
When the numeral setting strobe flag bit has been notified to the PC it returns to
the OFF (0) status.
For details on the method for storing a number in the word allocated for the nu-
meral table, see “Allocation Words and Display of the Memory Tables” (page
201).
S
Restrictions on allocating words