Chapter 3 PLC System Configuration & Settings The firmware versions of AH5x0,AH5x1 and AH560 redundant system series modules will be based on the actual firmware versions of the modules scanned. If the firmware version of a module which is scanned is higher than the firmware version of the module in the MDS document, the highest version which can be selected will be displayed in the Firmware Version drop-down list for the module, and the actual firmware version of the module will be displayed in the Comment cell for the module. For AHxxEMC series, both module firmware adopts the scanned firmware version.
However, if the firmware version of the scanned module is not compatible with the system firmware (DDF version), users can select the highest version number for Firmware Version from the drop-down list, while the actual firmware version is shown in the Comment cell. *. Please refer to section 3.4.1 for more information about MDS documents and firmware versions of modules. The difference between I/O Scan and Upload can be illustrated with the following example. If I/O Scan is clicked, the hardware configuration will be scanned, and the parameters in the modules will not be scanned. If Upload is clicked, the hardware configuration in the CPU module will be read.
The hardware configuration uploaded to HWCONFIG may be different from the actual hardware configuration. The parameters in the hardware shown below are downloaded to the CPU module first. The parameter in AH16AN01R-5A (installed in slot 1) is as follows. Then, AH04HC-5A installed in slot 2 is removed from the actual backplane. The BUS FAULT LED indicator on the CPU module will be ON, that is to say, the hardware configuration in the CPU is different from the actual hardware configuration. Next, I/O Scan is clicked. The scan result will be the same as the actual hardware configuration.
After AH16AN01R-5A (installed in slot 1) is double-clicked to open the Parameter Setting window, users will find that the parameter in the module is assigned the default value. The value of the parameter is different from the value of the parameter previously downloaded to the CPU module, that is to say, only the hardware configuration will be scanned after I/O Scan is clicked. Then, Upload is clicked. After the uploading is complete, users will find that the hardware configuration and the 3-247