Omron NT21 Reference Manual page 204

Alarm List, Alarm History
Display Functions
188
Alarm List
Apart from the Common Attributes, alarm lists have the properties indicated be-
low.
Properties
Settings
List Settings
Start Bit Table
Entry
No. of Bits
Referenced
Bit memory table
Bit memory table entry 24
Bit memory table entry 25
Bit memory table entry 26
Bit memory table entry 27
Bit memory table entry 28
Bit memory table entry 29
Bit memory table entry 30
Bit memory table entry 31
Drawing Result
An alarm list monitors host bits allocated to bit memory table entries within the
specified range in accordance with the bit memory table entry function property
settings and executes display in accordance with the General settings.
For details on the method of display according to the General settings, refer to
Common Attributes (page 186).
Alarm lists allow the screen to be switched in accordance with bit memory table
entry settings. For details, refer to 2-3-3 Bit Memory Table (page 83).
Alarm History
Apart from the Common Attributes, alarm histories have the properties indicated
below.
Properties
Settings
History Info
Order Type
Info Type
First bit memory table entry number of the bit memory
table entries used for monitoring for the alarm list
Range: 0 to 1999
Number of bit memory table entries used for monitoring
for the alarm list
Range: 1 to 1000
First bit memory table entry: 25
Number of bit memory table entries: 5
Presence/absence of occurrence time/occurrence
frequency displays (this means the presence or
absence of the time of occurrence in the case of order
of occurrence, and the presence or absence of the
occurrence frequency in the case of order of frequency)
Check mark (present)/No check mark (absent)
Type of display
order of frequency/order of occurrence
Method of display for the time of occurrence (setting effec-
tive only when order of occurrence is set for Order Type
and a check mark is set for History Info.)
Y/M/D h:m Year/month/day hour:minute (15 digits)
M/D h:m Month/day hour:minute (12 digits)
h:m Hour:minute (6 digits)
Section 2-11