Omron NT11S, Руководство по эксплуатации

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99
Outline of Host Link / NT Link Operation
Section 5-1
Notifying the Display Elements by Using Allocated Bits and Words
The NT11S will operate as follows in the display element notification operation.
[NT11S operation]
The NT11S will write any changes in the contents of the numeral or character-
string memory table being displayed or pressing of a system keys to the bits and
words area in the PC.
[NT11S operation example]
Numeral memory table 100
Copy
Numeral memory table0
Number of saved words : 1
First word : DM0110
DM0110:0432
NT11S PC
0 4 3 2
Notifying the NT11S Status by Using Allocated Bits and Words ..... PT Status Notify Area (PT to PC)
The PT status notify area (PT to PC) is provided to notify the NT11S status
changes to the PC. When any NT11S status has changed, such change is written
to this area in the PC, and the PC will read the data from this area to check the
NT11S status.
The PT status notify area is configured as three consecutive words as shown be-
low.
0
0 0
The first word (word m) of the PT status notify area must be set with the support
tool.
S
Currently displayed screen (refer to page 101)
The screen number displayed on the NT11S is written to this word.
Simultaneously, the PT status screen switch strobe flag is set to ON (1). After
this is notified to the PC, this flag reverts to OFF (0). Checking the status of this
flag will provide a simple method of checking if the NT11S display has switched.
S
Content upgrade memory table (refer to page 119)
The number of the numeral memory table is written to the word when the numer-
al memory table contents change due to the System keys operation on the
NT11S.
The contents of the word to which the numeral memory table has been allocated
also change.
Word 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Bit
Screen No. (4-digit BCD)
Screen being displayed
Content upgrade
memory table
Numeral memory table No. (3-digit BCD)
PT status
PT status
m
m+1
m+2