Mitsubishi MELSEC L Series User Manual page 284

(16) Built-in I/O function
Number Name
SM1840 Axis 1 busy
Axis 1 positioning
SM1841
completion
Axis 1 OPR
SM1842
request
Axis 1 OPR
SM1843
completion
SM1844 Axis 1 speed 0
SM1845 Axis 1 error
SM1846 Axis 1 warning
Axis 1 start in
SM1847
busy status
282
Meaning
• This relay turns on when positioning
control, OPR control, JOG operation, or
absolute position restoration is started.
This relay turns off when each control is
completed. In positioning control, this relay
OFF : Not busy turns off when the axis 1 decelerates and
ON : Busy stops, and then "dwell time" elapsed. (This
relay remains on while positioning control is
being performed.)
• This relay turns off when each control is
ended due to such as an error or stop
operation.
• This relay turns on when OPR control,
position control, or absolute position
restoration is completed.
• This relay turns off when OPR control,
OFF : Not completed positioning control, absolute position
ON : Completed restoration, or JOG operation is started.
• This relay remains off when JOG operation
is completed.
• This relay remains off when position control
is stopped.
• This relay turns on when the CPU module
OFF : Machine OPR
is powered on, is reset, or is set from STOP
control
to RUN; or the drive unit ready signal turns
completed
off; or machine OPR control is started.
ON : Machine OPR
• This relay turns off when machine OPR
control started
control is completed.
• This relay turns on when machine OPR
control is completed.
• This relay turns off when OPR control,
OFF : Not completed
positioning control, absolute position
ON : Completed
restoration, or JOG operation is started; or
the CPU module is set from STOP to RUN;
or the drive unit ready signal turns off.
• This relay turns on when JOG operation or
speed control in speed/position switching
OFF : Operating at
control set at a speed of "0" is started.
speed other than
• This relay turns on when speed is changed
0
with a new speed value of "0", and turns off
ON : Operating at
when speed is changed with a new speed
speed 0
value other than "0".
• This relay turns off when SM1840 turns off.
• This relay turns on if an error occurs.
• The present error can be checked by
OFF : No error
SD1845.
ON : Error
• This relay is turned off by turning on
SM1850.
• This relay turns on if a warning occurs.
• The present warning can be checked by
OFF : No warning
SD1846.
ON : Warning
• This relay is turned off by turning on
SM1850.
• This relay turns on when positioning
OFF : No start
control, OPR control, JOG operation, or
attempted in
absolute position restoration is attempted
busy status
while the axis 1 is in the busy status. The
ON : Start attempted in
executed start instruction will be ignored.
busy status
• This relay is reset by the user.
Explanation
Status change)
Status change)
Corre-
Set by sponding Corresponding
(When Set) ACPU
M9
S
(Every END
processing)
S
(Instruction
execution/
S
(Every END
processing)
New
S
(Instruction
execution/
S
(Every END
processing)
S
(Instruction
execution)
/U
CPU
LCPU