Mitsubishi Electric MELSEC iQ-R Series User Manual page 69

Creating and refreshing a module-specific backup parameter
A module-specific backup parameter is created or refreshed at the refresh timing of offset/gain values stored in the non-
volatile memory of a temperature input module.
Timing of creating or refreshing the
backup data
Completion of offset/gain setting using "Offset/
gain setting" of the engineering tool
Turning on 'User range write request' (YA) in the
offset/gain setting mode
Turning on 'User range write request' (YA) in the
normal mode
Executing the G(P).OGSTOR in the normal mode
Recognizing a new module during online module
change
When the creation of a module-specific backup parameter is required using the current offset/gain setting because the
parameter does not exist in the data memory of a control CPU, shift a temperature input module to the offset/gain setting
mode, and then turn on 'User range write request' (YA). This operation creates a module-specific backup parameter using a
current data of flash memory.
■Precautions
If a control CPU runs out of free space on the data memory, or module-specific backup parameter creation fails because the
creation was attempted in use of the backup parameter, a module-specific backup parameter creation error (error code:
17E1H) occurs.
Reading a module-specific backup parameter
To read a module-specific backup parameter and restore offset/gain values, set "Auto restore of Offset/gain setting with the
module change" of [Module Parameter] to "Enable" in advance.
[Navigation window]  [Parameter]  [Module Information]  Module model name  [Application setting]  [Online
module change]
■Read timing
A module-specific backup parameter is read at the timing when a new module is installed and recognized during online
module change. A module-specific backup parameter is not read if a module is replaced with the programmable controller
being powered off.
■Precautions
When the module-specific backup parameter corresponding to the target slot does not exist in the data memory or SD
memory card of a control CPU, the subsequent restoration of offset/gain values is not performed. When offset/gain values
have not been restored even if the module-specific backup parameter exists, a module-specific backup parameter restoration
error (error code: 17E0H) occurs.
Restoring offset/gain values in the user range
When the read of the module-specific backup parameter has been completed normally, the read data is converted (restored)
to the offset/gain values in the user range for the new module, and saved in the non-volatile memory. At the same time, the
module-specific backup parameter in the data memory of the control CPU is refreshed with the setting of the new module.
Description
A module-specific backup parameter is created or refreshed at the completion of "Offset/gain setting" of the
engineering tool.
A module-specific backup parameter is created or refreshed when offset/gain values in the user range
have been changed in the offset/gain setting mode.
Turning on 'User range write request' (YA) in the normal mode restores offset/gain values in the user range
using data in buffer memory areas (CH1 Factory default setting offset value (L) to CH8 User range setting
gain value (H)). A module-specific backup parameter is refreshed at this timing.
Executing the G(P).OGSTOR in the normal mode restores offset/gain values in the user range. A module-
specific backup parameter is refreshed at this timing.
During online module change, when a new module is installed and recognized, offset/gain values in the
user range are restored. A module-specific backup parameter is refreshed at this timing.
1.14 Backing up, Saving, and Restoring Offset/Gain Values
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1 FUNCTIONS
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