Chapter 3 PLC System Configuration & Settings and corresponding descriptions. In order to update data constantly, the system uses auto-configuration for the device in storing data. As for internal parameters not updated frequently in modules, users can define the corresponding device D and when the system starts operating, the corresponding device D in the PLC CPU will align with internal parameters of the assigned module. As a result, users can indirectly save internal data of the module through corresponding device D. This is more effective than using the traditional FROM / TO command to save internal data of the module.
For example, the AH04AD-5A module parameter setting window has D3000 defined as the module parameter – CH0 Average Time of corresponding device D . Thus, after HWCONFIG parameters are downloaded to the PLC CPUs, users can directly modify D3000 content value in the PLC CPU and indirectly modify CH0 Average Time of AH04AD-5A module. In addition, if modules parameters written in corresponding device D are not permitted, the system will restore the parameters to its original values. 3-123