Omron NT620S Operation Manual page 193

Alarm List & History Display Functions
4-11-2 Displaying the Alarm History
• Image library
Code of image library data displayed together with a message is set.
• Screen switchover
Screen number displayed by the alarm list and history display function is set.
• Contact
Contact on the PC, to which the bit memory table is assigned, is set.
Symbol C Series PCs
DM Data Memory
CH Internal/Special Relay
TIM Timer
CNT Counter
HR Holding Relay
AR Auxiliary Relay
LR Link Relay
The Auxiliary Relay area of CVM1/CV series PC is used exclusively for special
application in the system, and cannot be used for other application.
When Data Memory (DM) is specified, the bit number (00 to 15) is specified
following the channel number.
Example of setting:
No. Host # Table
000 No No
001 No No
002 Ys No 999
003 Ys No 123
004 No No 124
005 No No 125
006 No No
007 No No
In this example, four contacts of CH000000, AR000000, LR001003,
LR001004 are monitored using four bit memory tables of bit memory table
numbers 002 to 005.
Alarm History always monitors the state of contact that has the "Record" setting
in the item "Recording the alarm history" of the bit memory table, and records the
date and time when the contact turns "1" (ON).
The contacts recorded in the alarm history are always monitored irrespective of
the display screen of the NT620S/620C. If the number of contacts are increased
excessively, the processing speed of the NT620S/620C may become slower.
Alarm history is common to all bit memory tables. Unlike the message display, it
cannot deal with only a part of bit memory table.
Allocated CVM1/CV Series PCs
f
Data Memory
f
Internal/Special Relay
Timer
Counter
f
–
f
Auxiliary Relay
f
–
Image
Dsp Cl SwScreen
& Lib
Red FD20 2000
Blue FD21 1234
Whit FD22 1235
Whit FD23 1236
Section 4-11
Allocated
f
f
f
: OK : NG
Bit Comment
––––––
––––––
CH
000000
AR
000000
LR 001003
LR 001004
––––––
––––––
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