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4-11
Section
Alarm List & History Display Functions
183
•
In order of frequency
The alarm history is displayed in the order of frequency that a contact becomes
“1” (ON). Number of occurrence is displayed simultaneously.
Cycle time over
114
Abnormal high function unit
1
53
Abnormal remote I/O
1
39
The following countermeasure should
be taken:Program is checked again.
Setting of cycle time over not detected
(DM6655:X1XX)
Cycle time
exceeds 100 msec!
For both order of occurrence and order of frequency, the maximum number of
entries that can be displayed is 16 in the case of the NT620S and 24 in the case of
the NT620C. When the alarm history is set, the scrolling keys are created auto-
matically. Creating and using the scrolling keys are the same as the alarm list
display. Refer to the “Scrolling the message” (page 179). Displaying the image
library and switching over the screen are the same as the alarm list display. Refer
to the “Switching the Image Library to be Displayed” and “Switching over to the
Corresponding Screen” (page 180).
The alarm history can be displayed simultaneously in the order of occurrence
and frequency in one screen, respectively.
The alarm history display function does not automatically update the contents of
display even when the state of contact is changed during displaying operation.
The contents of display is updated when pressing the scrolling keys.
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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