Chapter 6 Writing a Program
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6.6.3
Connection Test
After a program is downloaded to a PLC, users can monitor the execution status of the PLC
through ISPSoft. There are two monitoring modes that ISPSoft provide. One is the device
monitoring mode, and the other is the program monitoring mode.
Device monitoring mode
Users can monitor the statuses of the devices in the PLC through the
monitoring table. In this mode, ISPSoft only needs to update the statuses
of the devices. The present program in ISPSoft does not need to be the
same as the program in the PLC.
Program monitoring mode
In this mode, the operating status of the program is displayed in the
program editing window. As a result, the present program in ISPSoft must
be the same as the program in the PLC.
*. The device monitoring function can be enabled independently. However, if the program monitoring function is
enabled, the device monitoring function is also enabled.
After users click Online Mode on the PLC menu, or on the toolbar, the online monitoring function will be
enabled. The system will also enable the device monitoring mode and the program monitoring mode.
In the online monitoring mode, users can view the present scan time, the communication status, and the
status of the PLC in the status bar in ISPSoft.
Besides, the present statuses of the devices will be displayed in the original program editing window after the
program monitoring function is enabled.
Users can change the operating status of a PLC by the RUN/STOP switch on the PLC. They can also change
the operating status of the PLC through the functions provided by ISPSoft. After users click Run on the PLC
menu or on the toolbar, the PLC will begin to run. The PLC will stop running after Stop on the PLC
menu or on the toolbar is clicked.
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