Appendices; Appendix 1 Special Relay And Special Register List - Mitsubishi MELSEC-Q Series Programming Manual

APPENDICES

APPENDICES

APPENDIX 1 Special Relay and Special Register List

This section lists the special relays and special registers that can be used in SFC programs.
For the special relays and special registers for other programs, refer to the user's manual for the
CPU module used.
The heading descriptions in the lists are shown in the table below.
Item
Number • Indicates special relay and special register number.
Name • Indicates name of special relay and special register.
Meaning • Indicates contents of special relay and special register.
Explanation • Discusses contents of special relay and special register in more detail.
Set by • Indicates whether the relay or register is set by the system or user, and, if it is set by the system,
(When set) when setting is performed.
<Set by>
S
U
S/U : Set by both system and user
<When set>
Indicated only for relays and registers set by system
Initial
Status change
Error
Instruction execution
Corresponding
Indicates the corresponding CPU module type name.
CPU
A
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: Set by system
: Set by user (sequence programs or test operations from GX Developer)
: 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 when instruction is executed
Function of Item
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