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Chapter 3 Creating and Editing Screens
3-170 Revision May, 2010
Property Description of Trend Graph Elements
Sample Number
Max. Sample
Number
Please note that when the sample number is a
constant, the Max. Sample Number
option is
disabled.
When Sample Number is a variable value
:
When the sample number is set to the address
(register), the sample number is a variable value.
The user can change the value of the address to
modify the sample number at the same time. When
the sample number is a variable value, the Max.
Sample Number option must be set. If the read
value is more than the set Max. Sample Number
, the
system will take the set Max. Sample Number
as the
actual maximum sample number.
Data Format
Word
1. BCD
2. Signed BCD
3. Signed Decimal
4. Unsigned Decimal
5. Hex
Read Address
The address can be internal memory or the
controller address. (Please refer to Table 3.2.2
Property Description of General Buttons.)
The trend graph will continuously read numbers of
addresses from the read address set by the user,
convert the read data into trend graph and display
on HMI screen. The numbers of the addresses is
determined by the setting of “Sample Number”.
Sample Flag
It is used to set trigger and clear flag. When sample
flag is triggered, it will start to read data and draw
the graph. This sample flag is located within the
control block. Please refer to section 3.4 in Chapter
3 for the settings of the control block.
Setting
Minimum
Maximum
It is used to set the minimum and maximum value
of the display data, i.e. the minimum and maximum
value of Y-axis. If the read value is more the
maximum or less than the minimum, the system
will display the minimum and maximum value still.