Operation Of B7A Units - Omron NT30C-ST141-E Operation Manual

Operation of B7A Units

4-12 Operation of B7A Units

Caution
- In Order of Occurrence
The alarm history is displayed in the order that a bit becomes 1 (ON). As more
detailed information, date and time of occurrence can be displayed simulta-
neously.
Abnormal remote I/O
Abnormal high function unit
Cycle time over
- In Order of Frequency
The alarm history is displayed in the order of frequency that a bit becomes 1
(ON). Number of occurrence is displayed simultaneously.
Cycle time over
Abnormal high function unit
Abnormal remote I/O
In either case, the number of alarms displayed can be set up to 12. When the
alarm history is set, the scrolling keys are created automatically. Creating and
using the scrolling keys are the same as the alarm list display. Refer to the Scroll-
ing the message (page 181). Displaying the image/library data and switching
over the screen are the same as the alarm list display. Refer to the Switching the
Image/Library Data to be Displayed and Switching over to the Corresponding
Screen (page 182).
The alarm history can be displayed simultaneously in the order of occurrence
and frequency on one screen, respectively.
The alarm history display function does not automatically update the contents of
display even when the state of bit is changed during displaying operation. The
contents of display is updated when pressing the scrolling keys.
A B7A Unit can be used to connect external devices, such as switches and indi-
cators, to the NT30/30C. This section describes the operation of the B7A Unit.
The B7A Unit has the following five functions:
• Input notification function
• Numeric key (system key) function
• Screen switching function
• External output function
• Backlight OFF function releasing attribute
Do not use the input functions of the B7A Unit for applications that could involve
danger to human life or serious property damage, or for emergency switch func-
tions.
Occurrence of
94/06/06 16:02
transmission
94/06/07 09:21
abnormality
94/06/17 15:44
Check the remote I/O
transmission line!
Cycle time
114
exceeds 100 msec!
153
The following countermeasure should
139
be taken:Program is checked again.
Setting of cycle time over not detected
(DM6655:X1XX)
Section 4-12
185