Mitsubishi Electric MELSEC iQ-R Series Manual page 32

Checks before replacement
The following shows the check procedure before replacement. In this procedure, stop the control of the online module change
target module for safe online module change.
■Redundant function modules
Check that a redundant function module in the other system is not being changed online.
■I/O modules
1.
Stop all the outputs (Y) and inputs (X).
2.
For an I/O module to which the external power supply is supplied, shut off the external power supply with a switch or
other means.
■I/O modules with diagnostic functions
1.
Stop all the outputs (Y) and inputs (X).
2.
Shut off the external power supply with a switch or other means.
■A/D converter modules (for the R60AD4)
1.
Set A/D conversion disable (1) in 'CH1 A/D conversion enable/disable setting' (Un\G500) of all the channels with an
external device (such as a GOT).
2.
Turn on and off 'Operating condition setting request' (Y9).
3.
Turn off all the Y signals.
4.
Check that the A/D conversion is stopped with 'A/D conversion completed flag' (Un\G42).
To replace other A/D converter modules, also stop the A/D conversion as above. For details on the I/O signals and buffer
memory areas of each A/D converter module, refer to the User's Manual (Application) for the A/D converter module used.
■D/A converter modules (for the R60DA4)
1.
Set D/A conversion disable (1) in 'CH1 D/A conversion enable/disable setting' (Un\G500) of all the channels with an
external device (such as a GOT).
2.
Turn on and off 'Operating condition setting request' (Y9).
3.
Turn off all the Y signals.
4.
Shut off the external power supply with a switch or other means.
5.
Check that the D/A conversion is stopped and the analog output value is 0V/0mA.
To replace other D/A converter modules, also stop the D/A conversion as above. For details on the I/O signals and buffer
memory areas of each D/A converter module, refer to the User's Manual (Application) for the D/A converter module used.
■Temperature input modules (for the R60TD8-G)
1.
Set Conversion disable (1) in 'CH1 Conversion enable/disable setting' (Un\G500) of all the channels with an external
device (such as a GOT).
2.
Turn on and off 'Operating condition setting request' (Y9).
3.
Turn off all the Y signals.
4.
Check that the temperature conversion is stopped with 'Conversion completed flag' (Un\G42).
To replace other temperature input modules, also stop the temperature conversion as above. For details on the I/O signals
and buffer memory areas of each temperature input module, refer to the User's Manual (Application) for the temperature input
module used.
3 REPLACEMENT PROCEDURE
30
3.4 Changing a Module by Controlling Special Relays and Special Registers