Bit Memory Tables - Omron NT631 Series Reference Manual

Memory Tables
Processing Functions
Relationship with Other Elements

2-3-3 Bit Memory Tables

Function Outline
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Character string memory tables have no data processing function.
• When character string display is used, the contents of character string memory
tables can be displayed in real time as character strings (page 138).
• When alarm list or alarm history is used, the contents of the character string
memory table can be displayed as a message (page 173).
• When a lamp's guide character is made into a character string display, the con-
tents of a character string memory table can be displayed as guide characters
in real-time (page 103).
• When a touch switch's guide character is made into a character string display,
the contents of a numeral memory table can be displayed as guide characters
in real-time (page 110).
• When character string input is used, character strings can be input into the
character string memory table from the screen of the PT (page 201). It is also
possible to input character strings from a bar code reader connected to the PT.
• When the touch switch copy setting function is used, the contents of a charac-
ter string memory table can be copied (page 126).
• By operation of the PT status control area. data can be copied between
memory tables from the host (page 46).
• If the contents of character string memory tables are changed by operation at
the PT, the change is notified to the PT status notify area (page 55).
Bit memory tables are internal memories for bit data.
They are allocated to a bit at the host to monitors a bit, and can execute a specific
function in accordance with the status of that bit.
Bit memory tables are assigned bit memory table numbers so that they can be
managed and designated individually.
Bit memory tables have the following functions.
Screen Changeover Function
When the host bit to which a bit memory table is allocated changes status from 0
(OFF) to 1 (ON), the screen whose screen number is set in the bit memory table
is displayed.
Screen number 11
displayed
If the allocated bits of multiple bit memory tables come ON at the same time, the
bit memory table with the smallest number takes priority.
Alarm List/History Function
When the status of the host bit to which a bit memory table is allocated changes
to 1 (ON), the contents of the character string memory table (message), and
image/library data set for that bit memory table are displayed (this is the alarm
list function). In order to use the alarm list function, it must be registered for the
screen in advance. If more than one bit memory table is set for the alarm list func-
tion, those with smaller bit memory table numbers are given display priority,
therefore it is possible to assign an order or priority to displayed messages.
If registration in the alarm history is designated, the time when the status of the
host bit to which the bit memory table is allocated changes to 1 (ON) is recorded
in the alarm history (alarm history function).
No. 1
Screen number 10
Screen number 11
No. 2
Screen number 12
No. 3
Section 2-3
Bit PC
0
← 1 (ON)
0
0
75