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Chapter 6
Components
the user can obtain the sampling information before the switchover. However, the data acquisition
of the oscilloscope is only valid on the current page; in other words, after each switchover, the
system will not sample oscilloscope data and the data will get lost. When a user switches back to
the oscilloscope window, it will resume data sampling from the very beginning. The advantage of
an oscilloscope is that a user can monitor multiple waveforms, for which the long-term monitoring
is not necessary, without adding extra background processing loads. Meanwhile, the oscilloscope
provides variable-rate sampling function, which when cooperating with a PLC, enables a user to
obtain higher sampling frequency, without being restricted to the frequency of 1 point per second.
X Procedure to add an oscilloscope
1.
Click the Oscilloscope component icon and drag it to the window, the basic attribution tab of
the component attribution dialogbox appears.
Input Address: Specify the PLC word register address corresponding to the first curve, the
second curve data register is located at Read Address + 1, and the third is located at read
address + 2, etc
Address Type: Select the address type of the register corresponding to the oscilloscope, that
is, the monitored register’s address type. The address type varies with PLC type. Alternatively,
you can also use the internal register of the HMI. For internal registers of HMI, refer to Section
5.4. Please note that some internal registers of the HMI are reserved by the system. Do not
use these registers. For details, refer to Chapter 11.
Address: The initial address of the word registers corresponding to the curves in the
oscilloscope component.
Code Type: BIN or BCD.
No. of Words: Depends on the number of sampling channels (curves). If the number of
channels is N (1<=N<=16) (which means there are N curves to be shown), the No. of Words
is N.
Use Address Tag: Whether to use the address entered in the address tag library. For details,
refer to Section 6.35.
Description: A reference name (not displayed on the runtime screen) that you assign to the
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