Omron NT21 Series, Reference Manual

Page: 58 / 466

2-2 Section Areas for Control/Notification
49
When Data is Written From The PT
When the screen display has been switched by operation at the PT, the new
screen number is written as a 4-digit BCD or hexadecimal value into the screen
switch setting word by the PT. At the same time, the ON status is also notified to
the screen switch strobe flag of the PT status word of the PT status notify area by
the PT (after notification, the OFF status is re-established) (page 295). Whether
the data is written in BCD or hexadecimal format is determined by the setting for
numeral storage type in the PT configuration settings made at the Support Tool.
Currently
displayed screen
PC PT
←
Screen number
PT status control area
Screen switch setting
Copy memory
table setting
PT status control setting
Reserved for system use
←
Screen switch strobe
flag
PT status notify area
Content update memory table
PT status
Screen Switch Setting Word of The PT Status Control Area and PT Status
Word of The PT Status Notify Area
PT status control area
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Word
Bit
n
Screen switch setting
Screen number (4-digit BCD or hexadecimal)
PT status notify area
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Word
Bit
0 0 0 0 0 0 0 0 0 – – – – – – m + 1
PT status
Screen switch strobe flag
The screen numbers notified are as follows.
BCD Hexadecimal Screen
0000 0000 No-display (screen cleared)
0001 to
3999
0001 to 0F9F Screen numbers 1 to 3,999
9001 2329 Occurrence history screen
9002 232A Frequency history screen
9020 233C Programming Console function screen
9021 233D Device Monitor function: Registration monitor screen
9022 233E Device Monitor function: Continuous monitor screen
9023 233F Device Monitor function: Error log screen
9030 2346 Brightness and contrast adjustment screen
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