Mitsubishi Electric MELSEC iQ-R Series User Manual page 113

Saving and restoring by reading from and writing to the buffer memory
Use Save data type setting (Un\G4002), CH1 Factory default setting offset value (Un\G4004) to CH4 User range setting gain
value (Un\G4019), and 'User range write request' (YA) to read the offset/gain values from the source D/A converter module.
Use the buffer memory again to write the values to the destination D/A converter module.
The following describes the procedure for using the buffer memory.
■To restore offset/gain values onto a new replaced module:
1.
Set Save data type setting (Un\G4002).
Performing the
operations to the
2.
Turn on and off 'Operating condition setting request' (Y9).
source D/A converter
module
3.
Save the stored values of Save data type setting (Un\G4002) and CH1 Factory default setting offset
value (Un\G4004) to CH4 User range setting gain value (Un\G4019).
4.
Replace the D/A converter module.
Performing the
operation when the
power of the module
is off
5.
Performing the Write the data saved in Save data type setting (Un\G4002) and CH1 Factory default setting offset
operations to the
value (Un\G4004) to CH4 User range setting gain value (Un\G4019).
destination D/A
6.
converter module
Turn on 'User range write request' (YA).
7.
Check that 'Offset/gain setting mode status flag' (XA) is on.
8.
Turn off 'User range write request' (YA).
9.
Check whether the destination D/A converter module operates with the offset/gain values that are
restored.
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. (To write data: use the SP.FWRITE instruction. To read data: use
the SP.FREAD instruction.)
• Store the saved data.
■To apply the offset/gain values set in one module to the other modules in the same system:
1.
Set Save data type setting (Un\G4002).
Performing the
operations to the
2.
Turn on and off 'Operating condition setting request' (Y9).
source D/A converter
module
3.
Save the stored values of Save data type setting (Un\G4002) and CH1 Factory default setting offset
value (Un\G4004) to CH4 User range setting gain value (Un\G4019).
4.
Performing the Write the data saved in Save data type setting (Un\G4002) and CH1 Factory default setting offset
operations to the
value (Un\G4004) to CH4 User range setting gain value (Un\G4019).
destination D/A
5.
converter module
Turn on 'User range write request' (YA).
6.
Check that 'Offset/gain setting mode status flag' (XA) is on.
7.
Turn off 'User range write request' (YA).
8.
Check whether the destination D/A converter module operates with the offset/gain values that are
restored.
1.18 Backing up, Saving, and Restoring Offset/Gain Values
1
1 FUNCTIONS
111