Appendix 5 Special Register (Sd) For Remote I/O Module List - Mitsubishi Electric QJ71LP21 Reference Manual

APPENDIX

Appendix 5 Special Register (SD) for Remote I/O Module List

Number
Name
Meaning
Explanation
Set by (When set)
Corresponding ACPU
M9
Corresponding CPU
For details on the following items, see these manuals:
• CPU
• Networks
• SFC
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Special registers SD are internal registers whose specifications are decided by the
CPU and remote I/O module. For this reason, they cannot be used by sequence
programs in the same way as the normal internal registers. However, they can be used
to write data as needed in order to control the CPU and remote I/O modules.
Data stored in the special registers is stored as BIN values unless otherwise specified.
Use the GX Developer, or use a READ/WRITE command sent by the sequence
program, to monitor and write to the remote I/O module's special register.
Use the GX Developer to monitor and operate the ON/OFF controls of the remote I/O
module's special relay.
Connect the GX Developer to the remote master station or the remote I/O module,
then operate the online menu monitor and the device test. The sequence program will
read the special register according to the READ command, and write to the special
register according to the WRITE command.
The following table applies only to special registers related to remote I/O modules.
The headings in the table that follows have the following meanings.
Item
• Indicates special register number
• Indicates name of special register
• Indicates contents of special register
• Discusses contents of special register in more detail
• Indicates whether the relay is set by the system or user, and, if it is set by the system, when
setting is performed.
<Set by>
S : Set by system
U : Set by user (sequence programs or test operations from peripheral devices)
S/U : Set by both system and user
<When set>
Each END
Initial
Status change
Error
Instruction execution : Set when instruction is executed
Request
• Indicates corresponding special register in ACPU (D9
there has been a change in contents)
• Items indicated as "New" have been newly added for QnACPU
• Indicates the corresponding CPU type name.
+Rem: Can be applied to all CPU types and MELSECNET/H remote I/O modules.
: Can be applied to all types of CPU
QCPU: Can be applied to Q-series CPU
QnA: Can be applied to QnA series and Q2ASCPU series
Remote: Can be applied to the MELSECNET/H remote I/O modules.
Each CPU type name: Can be applied only to the specific CPU. (e.g. Q4ARCPU, Q3ACPU)
• QCPU User's Manual (Function Explanation, Program Fundamentals)
• Q-corresponding MELSECNET/H Network System Reference Manual (PLC to
PLC network)
• Q-corresponding MELSECNET/H Network System Reference Manual (Remote
I/O network)
• MELSECNET/10 Network System Reference Manual for QnA
• QCPU(Q mode)/QnACPU Programming Manual (SFC)
Function of Item
Indicated only for registers set by system
: Set during each END processing
: Set only during initial processing (when power supply is turned
ON, or when going from STOP to RUN)
: Set only when there is a change in status
: Set when error occurs
: Set only when there is a user request (through SM, etc.)
MELSEC-Q
)(Change and notation when
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