Mitsubishi Electric MELSEC iQ-R Series User Manual page 157

System information
The following table lists the special register areas relating to the system information.
No. Name Description
SD200 Status of switch Remote head
module switch
status
SD201 LED status Remote head
module LED status
SD203 Remote head Remote head
module operating module operating
status status
SD228 Redundant system Number of remote
information head modules
SD229 Remote head
module number
SD230 Remote head No.1
operating status
SD231 Remote head No.2
operating status
SD241 Extension stage 0: Main base unit
number only
1 to 7: Number of
extension base
units
SD242 Identification for Identification of the
whether or not Q base type
series module can 0: Cannot be
be mounted mounted (There is
no base unit on
which the Q series
module can be
mounted.)
1: Can be mounted
(There is a base
unit on which the Q
series module can
be mounted.)
Details
The switch status of the remote head module is stored as follows:
0: RUN
1: STOP
The information that indicates LED status (0: off, 1: on, 2: flashing) of the
remote head module is stored in the following bit patterns. 0 = Off, 1 =
On, 2 = Flashing
b0, b1: RUN
b2, b3: ERR
b4, b5: BUS RUN
b6, b7: D LINK
b8, b9: CTRL
b10, b11: SD/RD
b12, b13: SBY
b14, b15: L ERR
The operating status of the remote head module is stored as follows:
0: RUN
2: STOP
The number of remote head modules which constitute a redundant
system is stored.
1: Non-redundant system
2: Redundant system
The remote head number of the own remote head module is stored when
a redundant system is configured.
The operation information for each remote head number is stored. (The
amount of stored information depending on the number of remote head
modules indicated in 'Redundant system information' (SD228) is stored).
b0 to b3: Operating status
• 0: RUN
• 2: STOP
• 4: INITIALIZE
• FH: RESET
b4, b5: Classification
• 0: Normal
• 1: Minor error
• 2: Moderate error
• 3: Major error
b6: Empty
b7: Stop error flag
• 0: No stop error
• 1: Stop error
b8 to b14: Empty
b15: Mounting status
• 0: Not mounted
• 1: Mounted
The maximum number of implemented extension base units is stored.
Identify whether or not Q series module can be mounted. When no SD
memory card is inserted, the value is fixed to 0.
b0: Main base unit (fixed to 0)
b1: 1st extension base unit (Q series module can be mounted.)
b2: 2nd extension base unit (Q series module can be mounted.)

b7: 7th extension base unit (Q series module can be mounted.)
b8 to b15: Fixed to 0
Set by (setting
timing)
S (Switch change)
S (Status change)
S (Always)
S (Initial)
S (Initial)
S (During END/Error)
S (Initial)
S (Initial)
Appendix 4 List of Special Register (SD) Areas
A
APPX
155