Mitsubishi Electric MELSEC iQ-R Series User Manual page 73

Saving and restoring by reading from and writing to the buffer memory
Use buffer memory areas of CH1 Factory default setting offset value (L) to CH8 User range setting gain value (H), and 'User
range write request' (YA) to read the offset/gain values from the source temperature input module. Use the buffer memory
areas again to write the values to the destination temperature input module.
The following describes the procedure with using the buffer memory.
■To restore offset/gain values onto a new replaced module:
1.
Operation to the source
temperature input module
2.
When the power of the
module is off
3.
Operation to the destination
temperature input module
4.
5.
6.
7.
When replacing modules, prevent the saved offset/gain setting data from being deleted, by one of the
following methods before powering off the module.
• Use latch settings for the internal device of the destination module.
• Save the data onto an SD memory card. (For data write: Use the SP.FWRITE instruction. For data read:
Use the SP.FREAD instruction.)
• Record the saved data.
■To apply the offset/gain values set in one module to the other modules in the same system:
1.
Operation to the source
temperature input module
2.
Operation to the destination
temperature input module
3.
4.
5.
6.
Save the stored values of CH1 Factory default setting offset value (L) to CH8 User range
setting gain value (H).
Replace the temperature input module.
Write the data saved in CH1 Factory default setting offset value (L) to CH8 User range setting
gain value (H).
Turn on 'User range write request' (YA).
Check that 'Offset/gain setting mode status flag' (XA) is on.
Turn off 'User range write request' (YA).
Check that the destination temperature input module operates with the offset/gain values that
are restored.
Save the stored values of CH1 Factory default setting offset value (L) to CH8 User range
setting gain value (H).
Write the data saved in CH1 Factory default setting offset value (L) to CH8 User range setting
gain value (H).
Turn on 'User range write request' (YA).
Check that 'Offset/gain setting mode status flag' (XA) is on.
Turn off 'User range write request' (YA).
Check that the destination temperature input module operates with the offset/gain values that
are restored.
1.14 Backing up, Saving, and Restoring Offset/Gain Values
1
1 FUNCTIONS
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