Mitsubishi Electric MELSEC iQ-R Series User Manual page 148

No. Name
SM1615 Module selection cancellation
request flag
SM1616 Online module change
availability flag
SM1617 Online module change status
flag
SM1618 Online module change error
flag
SM1619 Disable request flag during
online module change
Redundant function (own system remote head module information)
The following table lists the special relay areas relating to the redundant function. The remote head module information of the
own system is stored.
These relays are enabled only for a redundant system. All relays are turned off when a redundant system is not used.
: Can be set, : Cannot be set
No. Name
SM1634 Control system
judgment flag
SM1635 Standby system
judgment flag
SM1637 System switching
detection (standby
system to control
system)
SM1646 System switching by
a user
SM1654 Memory copy being
executed
SM1655 Memory copy
completion
APPX
146
Appendix 3 List of Special Relay (SM) Areas
Data stored
OffOn: Module selection
cancellation requested
Off: Disabled
On: Enabled
Off: Function not executed
On: Function being
executed
Off: No error
On: Error
Off: No disabled request
On: Disable request
detected
Data stored Details
Flag that indicates the operating status of the remote head module
SM1634=Off, SM1635=Off: Systems not determined
SM1634=Off, SM1635=On: Standby system
SM1634=On, SM1635=Off: Control system
Off: Not detected This relay is turned on after the standby
On: Detected system has been switched to the control
system.
Off: Disabled This relay stores whether to enable system
On: Enabled switching operation by a user using an
engineering tool. The initial value is off.
Off: Not executed This relay is turned on during memory copy
On: Being from the control system to the standby
executed system.
This relay is turned off when memory copy is
complete.
Off: Not This relay is turned on upon completion of
completed memory copy from the control system to the
On: Completed standby system.
The initial value is off.
Details
This relay is turned on to cancel a module
selection request. This relay can be turned on
only when the value set in 'Online module
change progress status' (SD1617) is 2 (Module
selected). This relay is turned off after the
selection is canceled.
Note that the setting details in the direct change
setting cannot be checked with 'Online module
change availability flag' (SM1616). To check the
direct change setting, check the CPU
parameters.
This relay is turned on when 'Module selection
request flag' (SM1600) is turned on to start the
online module change processing. This relay is
turned off upon completion of the online module
change processing.
This relay is turned on when an error is
detected. This relay is turned off when the error
cause is eliminated and the online module
change related request is executed.
An error occurs in selecting a module. Thus,
turn off the relay before module selection.
This relay is turned on when a disabled request
is issued during the online module change
processing. This relay is turned off upon
completion of the online module change
processing.
Set by (setting
timing)
S (Status change)
S (Status change)
U
S (Status change)
S (Status change)
Set by (setting timing)
S (Status change)/U
(Request)
S (Initial)
S (Status change)
S (Status change)/U
(Request)
S (Status change)
Effective system
Control Standby
system system
 
 
 
 
 