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4-11
Section
Alarm List & History Display Functions
181
•
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
Allocated
CVM1/CV Series PCs
Allocated
DM
Data Memory
f
Data Memory
f
CH
Internal/Special Relay
f
Internal/Special Relay
f
TIM
Timer
Timer
CNT
Counter
Counter
HR
Holding Relay
f
–
AR
Auxiliary Relay
f
Auxiliary Relay
LR
Link Relay
f
–
f
: OK
: NG
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
Dsp Cl
Image
& Lib
SwScreen
Bit
Comment
000
No
No
––––––
001
No
No
––––––
002
Ys
No
999
Red
FD20
2000
CH
000000
003
Ys
No
123
Blue
FD21
1234
AR
000000
004
No
No
124
Whit
FD22
1235
LR 001003
005
No
No
125
Whit
FD23
1236
LR 001004
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.
4-11-2 Displaying the Alarm History
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.
Summary of Contents for NT620C
Page 1: ...Cat No V033 E1 5 Programmable Terminals NT620S 620C OPERATION MANUAL...
Page 2: ...NT620S 620C Programmable Terminals Operation Manual Revised April 2001...
Page 3: ...iv...
Page 5: ...vi...
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