Omron NT31C Reference Manual page 66

Areas for Control/Notification
Operation
1, 2, 3...
Reference:
Reference: The alarm history can also be initialized from the MEMORY INIT. MENU screen
2-2-2 PT Status Notify Area (PT to Host)
Reference: The configuration and functions of the PT status notify area are different when
Allocated Words of the
PT Status Notify Area
1. Set the numbers of the copy source and copy destination memory tables for
copy source memory table No. (word n + 1) and copy destination memory
table No. (word n + 2) of the PT status control area.
2. Set the type of the memory table to be copied for memory table copy type (bit
2) of the PT status control bits (word n + 3) as follows.
• 1 (ON):
When copying between numeral memory tables
• 0 (OFF):
When copying between character string memory tables
3. Set 1 (ON) for memory table copy execution (bit 3) of the PT status control
bits (word n + 3).
The memory table data is copied.
4. After copying has been executed, return memory table copy execution (bit
3) to 0.
S If the display method or number of registered words is different for the copy
source and copy destination memory tables, the data may not be displayed
correctly.
S If the contents of memory tables are changed by PT status control area opera-
tion, the change in memory table contents is not notified by the PT status notify
area.
S Memory tables are copied differently when the PT is set to NT30/620 compat-
ible mode. Refer to Appendix C for details on the NT30/620 compatible mode.
Alarm History Initialization (Bit 1)
This bit is used to initialize the alarm history recorded in the PT.
When it is switched from 0 (OFF) to 1 (ON), the alarm history in the PT is initial-
ized.
After initialization, return its status to 0.
under the System Menu of the PT.
The PT status notify area is provided to notify the host of changes in the status of
the PT. The host can determine the status of the PT by reading this area.
The PT status notify area is configured as two consecutive words as shown be-
low. The first word (word m) is set in the Control/Notify Area settings in the PT
configuration settings made with the Support Tool.
15 14 13 12 11 10 9
Word
Numeral/character string memory table number
m
(4-digit BCD or hexadecimal value)
m + 1 PT status notify bits
the PT is set to NT30/620 compatible mode. (There are 3 words, with the first
word indicating the screen currently being displayed.) Refer to Appendix C for
details on the NT30/620 compatible mode.
The PT status notify area (PT → host) can be allocated to the following host (PC)
areas.
8 7 6 5 4 3 2 1
0 0
Section 2-2
0 Bit
Content update
memory table
0
PT status
55