Special Relay List - Mitsubishi Q01CPU User Manual

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TROUBLESHOOTING

12.7 Special Relay List

Item
Number • Indicates special register number
Name • Indicates name of special register
Meaning • Indicates contents of special register
Explanation • 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
U
S/U
<When set>
Indicated only for registers set by system
Set by
Each END
(When set)
Initial
Status change
Error
Instruction execution : Set when instruction is executed
Request
System switching
• Indicates the corresponding special relay (M9
Corresponding
(When the contents are changed, the special relay is represented M9
ACPU M9 Q00J/Q00/Q01 and QnPRH.)
• New indicates the special relay newly added to the QnACPU or Q series CPU module.
Indicates the corresponding CPU module type name.
QCPU
Q00J/Q00/Q01
Qn(H)
Corresponding
QnPH
CPU
QnPRH
QnU
QnA
Rem
Each CPU module model name: Indicates the relevant specific CPU module. (Example: Q4AR, Q3A)
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- 270 12.7 Special Relay List
Special relays, SM, are internal relays whose applications are fixed in the Programmable
Controller.
For this reason, they cannot be used by sequence programs in the same way as the
normal internal relays.
However, they can be turned ON or OFF as needed in order to control the CPU module
and remote I/O modules.
The heading descriptions in the following special relay lists are shown in Table12.27.
Table12.27 Explanation of special relay list
: Set by system
: Set by user (sequence programs or test operations from GX Developer)
: Set by both system and user
: 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.)
: Set when system switching is executed.
: Indicates all the QnACPUs and QCPU.
: Indicates all the Q series CPU modules.
: Indicates the Basic model QCPU.
: Indicates the High Performance model QCPU.
: Indicates the Process CPU.
: Indicates the Redundant CPU.
: Indicates the Universal model QCPU
: Indicates the QnA series and Q2ASCPU series.
: Indicates the MELSECNET/H remote I/O modules.
For details on the following items, refer to the following manuals:
• Networks Manual of the corresponding network module
• SFC QCPU(Q mode)/QnACPU Programming Manual (SFC)
POINT
(1) SD1200 to SD1255 are used for QnACPU.
These relays are vacant with QCPU.
Function of Item
) of the ACPU.
format change. Incompatible with the