Online Module Change Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

Online module change function

The following is the list of special register areas relating to the online module change function.
No. Name
SD1600 Module selection (base
unit No.)
SD1601 Module selection (slot
No.)
SD1602 I/O No. of the module
being changed online
SD1617 Online module change
progress status
SD1618 Online module change
error code
SD1619 Disable request error
code during online
module change
APPX
700
Appendix 5 List of Special Register Areas
Data stored Details
Base unit No. where the The base unit number where the online change target module is
online change target mounted is specified.
module is mounted 0: Main base unit
1: Extension base unit 1

7: Extension base unit 7
FFFFH: Not specified (Default)
The stored value returns to its default (FFFFH) upon completion of
the online module change processing. When changing a module
directly, the system stores the corresponding base unit number
upon removal of the target module.
Slot No. where the online The slot number where the online change target module is
change target module is mounted is specified.
mounted 0: Slot No.0
1: Slot No.1

11: Slot No.11
FFFFH: Not specified (Default)
The specified value returns to its default (FFFFH) upon completion
of the online module change processing. When changing a module
directly, the system stores the corresponding slot number upon
removal of the target module.
I/O No. of the module The value of the I/O number of the module being changed online
being changed online divided by 16 is stored.
Other than FFFFH: I/O No.  16
FFFFH: Not specified (Default)
The stored value returns to its default (FFFFH) upon completion of
the online module change processing.
Online module change The online module change progress status is stored.
progress status 0: Normal operation
1: Module being selected
2: Module selected
3: Module removal requested
4: Module removal ready
5: Module removed
6: Module mounted
7: Module being recognized
8: Module recognized
9: Module control resumed
The value becomes 0 upon completion of the online module
change processing.
0: Normal operation The corresponding error code is stored when an error is detected
Other than 0: Error code during online module change. For the value stored, refer to the list
of error codes. ( Page 627 Error codes related to the online
module change function) This register is cleared to 0 when the
error cause is eliminated and the online module change related
request is executed. However, the error code needs to be cleared
to 0 before module selection since this register is not cleared to 0 if
an error occurs in selecting a module.
0: Normal operation The corresponding error code is stored when a disable request is
Other than 0: Error code executed during online module change. The error code is cleared
to 0 when the error cause is eliminated and the online module
change related request is executed.
For the value stored, refer to the list of error codes. ( Page 627
Error codes related to the online module change function)
Set by (setting
timing)
S (Status change)/
U (Request)
S (Status change)/
U (Request)
S (Status change)
S (Status change)
S (Status change)/
U (Request)
S (Status change)