Omron NT21 Reference Manual page 364

Using the Alarm List/History Function
Displaying the Alarm History Record from the System Menu
Setting
Line Scroll Touch Switches (Scroll To the Previous/Next Line)
The touch switches scroll the display range in units of a line forward and back-
ward.
If data exist before and after the displayed range, the touch switches are dis-
played in reverse video. Pressing a touch switch not displayed in reverse video
is disregarded.
Page Scroll Touch Switches (Scroll to the Previous/Next Page)
The touch switches scroll the display range in units of a page forward and back-
ward.
If data exist before and after the displayed range, the touch switches are dis-
played in reverse video. Pressing a touch switch not displayed in reverse video
is disregarded.
The recorded alarm history record data can be confirmed from the System
Menu. It is possible to print the alarm history record data using a printer con-
nected to the NT31/NT31C or NT631/NT631C.
Display in the Order of Occurrence (NT31/NT31C Shown)
Display in the Order of Frequency (NT31/NT31C Shown)
When creating a screen using the Support Tool, set the following.
Bit Memory Table
Set as shown below by the number of bits in the host to be monitored (for in-
formation not indicated below, set as needed.).
Allocated bits: Bits on the host to be monitored
Function: Alarm
History: Check mark set
Switch Screen: No check mark
String Table Entry: Table entry number (0 to 1999) of the character string
memory table entry to be displayed as a message
To display the alarm history in the order of occurrence, set the display order
(From Old Data/From New Data) of the record data using the Hist. Disp. Method
memory switch of the PT.
Section 3-8
349