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ISPSoft User Manual

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Chapter 3 Configuring and Setting a PLC System<br />

After the scan is complete, the actual hardware configuration will be displayed in the system<br />

configuration area, the system will assign input/output devices to the modules, the parameters in the<br />

modules are assigned the default values, and the firmware versions set in HWCONFIG will be the<br />

actual firmware versions of the modules. If the firmware version of a module which is scanned is<br />

higher than the firmware version of the module in the MDS document, the highest version which can<br />

be selected will be displayed in the Firmware Version drop-down list cell for the module, and the<br />

actual firmware version of the module will be displayed in the Comment cell for the module.<br />

*. Please refer to section 3.4.1 for more information about MDS documents and firmware versions of modules.<br />

The difference between I/O Scan and Upload can be illustrated with the following example. If I/O<br />

Scan is clicked, the hardware configuration will be scanned, and the parameters in the modules will<br />

not be scanned. If Upload is clicked, the hardware configuration in the CPU module will be read.<br />

The hardware configuration uploaded to HWCONFIG may be different from the actual hardware<br />

configuration.<br />

The parameters in the hardware shown below are downloaded to the CPU module first. The<br />

parameter in AH16AN01R-5A (installed in slot 1) is as follows.<br />

Then, AH04HC-5A installed in slot 2 is removed from the actual backplane. The BUS FAULT LED<br />

indicator on the CPU module will be ON, that is to say, the hardware configuration in the CPU is<br />

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