APPENDICES
APP
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30
Table 3.1 Special Relay List (Continued)
Number
Name
Stored Data
Explanation
M9054
STEP RUN flag
OFF STEP RUN not in effect
ON
STEP RUN in effect
!
ON when the RUN/STOP key switch is set to the RUN position.
M9055
Status latch completion
flag
OFF Not completed
ON
Completed
!
Comes ON when status latch is completed.
Goes OFF on execution of a reset instruction.
M9084
(Note-
2)
Error check
OFF Error check executed
ON
No error check
!
Set whether or not the error check shown below is executed on END
instruction processing. (Used to shorten END instruction processing
time.)
(1) Blown fuse check
(2) I/O module verification check
(3) Battery check
Device
number
Signal name
Signal
direction
Refresh cycle
Fetch cycle
M9073
PCPUWDT error flag
M9074
PCPU ready completion flag
M9075
Test mode flag
M9076
External rapid stop input flag
M9077
Manual pulse generator axis setting error flag
M9078
Test mode request error flag
M9079
Servo program setting error flag
PCPU
→
SCPU
END
POINTS
(1) All special relays, M, are turned OFF by turning the power, OFF,
performing latch clear, or resetting with the RESET key switch.
When the RUN key switch is set to "STOP", the special relay settings are
retained.
(2) The special relays (Note-1) in the table above remain "ON" even after a
return to normal. They must therefore be turned OFF by using one of the
following methods.
(a) Method using the user program
Insert the ladder block at right into the program and turn the reset
execution command contact ON to clear the special relay.
(b) Method using a peripheral device
Perform a forced reset using the test function of the peripheral
device.
For details on this operation, refer to the manual for the peripheral
device.
(c) Turn the special relay OFF by setting the RESET key switch on the
front panel of the CPU module to "RESET".
Reset execution
command
Enter the special relay
to be reset here.
RST M9000
(3) The ON/OFF status of special relays (Note-2) in the table above is
controlled by the sequence program.
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