Mitsubishi Electric MELSEC iQ-R Series User Manual page 109

Creating and updating a module-specific backup parameter
A module-specific backup parameter is created or updated when the offset/gain values stored in the flash memory of the D/A
converter module are updated.
Timing when backup data is created or updated
When the offset/gain setting is completed with "Offset/gain setting" of the
engineering tool
When 'User range write request' (YA) is turned on in the offset/gain setting
mode
When 'User range write request' (YA) is turned on in the normal output mode
When the G(P).OGSTOR instruction is executed in the normal output mode
When a new module is recognized after the online module change
When no module-specific backup parameter exists in the data memory of the control CPU and a module-specific backup
parameter needs to be created with the current setting, change the mode of the D/A converter module to the offset/gain
setting mode and turn on 'User range write request' (YA). A module-specific backup parameter is created with the current
setting of the flash memory.
■Precautions
If the creation of a module-specific backup parameter fails because the data memory of the control CPU does not have
sufficient free space or the module-specific backup parameter is being used, a module-specific backup parameter creation
error (error code: 17E1H) occurs.
Reading of module-specific backup parameters
To read a module-specific backup parameter and restore offset/gain values, set "Auto restore of Offset/gain setting with the
module change" of the module parameter to "Enable" in advance.
[Navigation window]  [Parameter]  [Module Information]  Module model name  [Application setting]  [Online
module change]
■Reading timing
Module-specific backup parameters are read when a new module is mounted and recognized in the process of online module
change. If the module is replaced with the programmable controller powered off, module-specific backup parameters are not
read.
■Precautions
When the module-specific backup parameter for the target slot does not exist in an SD memory card or the data memory of
the control CPU, the subsequent restoration of the offset/gain values is not performed. If the offset/gain values cannot be
restored even though the module-specific backup parameter exists, a module-specific backup parameter restore error (error
code: 17E0H) occurs.
Restoring the offset/gain values of the user range
Upon the successful completion of reading module-specific backup parameters, the values are converted (restored) into the
offset/gain values of the user range for the new module, and stored in the flash memory. At the same time, the module-
specific backup parameter in the data memory of the control CPU is updated with the setting of the new module.
Description
A module-specific backup parameter is created or updated when the offset/
gain setting is completed with "Offset/gain setting" of the engineering tool.
A module-specific backup parameter is created or updated when the offset/
gain values of the user range are changed in the offset/gain setting mode.
When 'User range write request' (YA) is turned on in the normal output mode,
the offset/gain values of the user range are restored based on the settings of
the buffer memory areas (Save data type, CH1 Factory default setting offset
value to CH4 User range setting gain value). At this timing, module-specific
backup parameters are updated.
When the G(P).OGSTOR instruction is executed in the normal output mode,
the offset/gain values of the user range are restored.
At this timing, module-specific backup parameters are updated.
When a new module is mounted and recognized after the online module
change, the offset/gain values of the user range are restored. At this timing,
module-specific backup parameters are updated.
1.18 Backing up, Saving, and Restoring Offset/Gain Values
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