Backing Up, Saving, And Restoring Offset/Gain Values; When A Module-Specific Backup Parameter Is Used - Mitsubishi Electric MELSEC iQ-R Series User Manual

1.14
Backing up, Saving, and Restoring Offset/Gain
Values
The offset/gain values of the user range setting of a temperature input module can be backed up, saved, and restored.
• Backup: Creates a module-specific backup parameter and saves offset/gain values in it.
• Save: Saves the offset/gain information, registered in this module by making the offset/gain setting, in the CPU module.
• Restoration: Writes the information backed up and saved in the CPU module to this module.
In the event that a temperature input module fails and needs to be replaced, the offset/gain values of the failed temperature
input module can be restored onto the replaced temperature input module.
However, if the offset/gain values are saved and restored, the accuracy after the restoration decreases by approximately three
times compared to that before the restoration. Reconfigure the offset/gain setting when required. Only when the model where
the offset/gain values are to be saved and the model where the offset/gain values are to be restored are the same, the offset/
gain values can be saved and restored.
Each procedure varies depending on whether to use a module-specific backup parameter or not.

When a module-specific backup parameter is used

The offset/gain values are automatically restored when the module replacement is complete using online module change.
For details on online module change, refer to the following.
 MELSEC iQ-R Online Module Change Manual
Module-specific backup parameter
A module-specific backup parameter is a file created in the data memory or SD memory card of a control CPU.
The data in this file is offset/gain values in the user range that is saved in the non-volatile memory of a temperature input
module.
The file of module-specific backup parameter is named using a start I/O number of a temperature input module as follows.
UBPmmmnn.BPR
• "mmm" indicates a value obtained from "I/O number of a module  10H (three hexadecimal digits)".
• "nn" indicates a consecutive number of a module-specific backup parameter given for each module, and fixed to 00.
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1.14 Backing up, Saving, and Restoring Offset/Gain Values