Danfoss MCO 305, Design Manual, Page: 126 / 242

MCO 305 Design Guide
__ Software Reference __
126
MG.33.L4.02 – VLT
®
is a registered Danfoss trademark
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MOTOR OFF
Summary Turns off motor control
Syntax MOTOR OFF
Description The motor control can be disabled by using the MOTOR OFF command. After
MOTOR OFF, the drive axis can be moved freely, as long as there is no motor
brake. A monitoring of the actual position will continue to take place, i.e. the actual
position (APOS) can still be queried after MOTOR OFF.
NB!:
For a restart of a motion process after MOTOR OFF the command MOTOR ON must
be used. Only the command ERRCLR automatically activates MOTOR ON.
Command Group INI
Cross Index MOTOR ON
Syntax Example MOTOR OFF /* switch off controller of the axis */
Program Sample MOTOR_01.M, POS_01.M
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MOTOR ON
Summary Turns on motor control
Syntax MOTOR ON
Description The motor control can be enabled again, following a previous MOTOR OFF, by use of
the MOTOR ON command. When carrying out the MOTOR ON, the commanded
position is set to the actual position, i.e. the motor remains at the actual position.
Thus the positioning error is reset at the execution of MOTOR ON.
NB!:
The MOTOR ON command is not suitable for re-activation of position control
following an error. For this purpose, the ERRCLR command is to be used.
Command Group INI
Cross Index MOTOR OFF
Syntax Example MOTOR ON /* switch on controller of the axis */
Program Sample MOTOR_01.M, POS_01.M
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MOTOR STOP
Summary Stops the drive
Syntax MOTOR STOP
Description By using the MOTOR STOP command, a drive in positioning, speed or synchronizing
mode can be decelerated with programmed acceleration and arrested at the
momentary position.
A drive arrested with this command can, at a later point, via the CONTINUE
command, resume its original motion. (Exception: CONTINUE does not continue an
interrupted synchronization command.)
NB!:
If MOTOR STOP is executed in a subprogram or if NOWAIT is set to ON, then the
next lines in the program are already processed while MOTOR STOP is being
processed; the braking process runs in the background.
Therefore, in order to slow the drive down to a speed of zero it is necessary to
ascertain that no new positioning command is given during braking.
Command Group CON
Cross Index POSA, POSR, CSTART, CONTINUE, CSTOP, NOWAIT
Syntax Example MOTOR STOP /* interrupt motion of the axis */
Program Sample MSTOP_01.M