135
Line Graphs Section 7-10
■ Description of Operation
The PT reads data from the PLC at the specified interval, and then saves it
into internal memory. The values saved in internal memory in the PT are dis-
played by the line graph part. The graph is updated at the specified interval.
■ Graph Type
There are two types of line graphs.
Pen Move: Once the display area is full, the graph is scrolled by a set
amount equal to a few minutes of data, after which graph draw-
ing is resumed.
Sheet Move: As monitoring is performed, the graph is drawn in the specified
direction.
■Broken-Line Graph
A bit in the PLC is used as a trigger to prompt the NV-Series to batch-read
multiple words of data from the PLC.
■ Description of Operation
When the specified bit in the PLC turns ON, the PT reads data from the PLC.
The data is displayed on the line graph. While the bit is ON, the graph is con-
stantly updated.
PT
20
40
30
50
80
10
90
D100
PLC
20
40
30
50
80
10
90
Internal memory in PT
PT Screen
Monitoring is
performed at
the specified
interval.
PT
D100 20
D101 40
D102 30
D103 50
D104 80
D105 10
D106 90
20
40
30
50
80
10
90
Internal memory in PT
PT Screen
All the data is
read at the
same time.
20
40
30
50
80
10
90
View
Batch read
PLC
ON
Specified bit
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