Danfoss MCO 305, Design Manual, Page: 104 / 242

MCO 305 Design Guide
__ Software Reference __
104
MG.33.L4.02 – VLT
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is a registered Danfoss trademark
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CVEL
Summary sets velocity for speed controlled motor movements
Syntax CVEL v
Parameter v = velocity value (negative value for reversing)
Resolution Velocity 83 - 32 par.
Velocity Maximum 80 - 32 par.
* V [RPM] Velocity Command
Description The velocity for the next speed controlled motor movement is set with the CVEL
command. The value remains valid until a further CVEL sets a new velocity.
The velocity value to be given will be related to the parameters 32-80 Maximum
Velocity and 32-83 Velocity Resolution .
NB!:
CVEL commands which take place after CSTART will be carried out immediately i.e.
the velocity will be adapted via the ACC/DEC set acceleration or deceleration to the
new value of CVEL.
If a velocity has not been defined before the start of speed control mode (CSTART),
then the default velocity is 0, i.e. the motor will not turn, and a velocity input via
CVEL will start the movement in speed control mode.
Command Group ROT
Cross Index ACC, DEC, CSTART, CSTOP,
Parameter: 32-80 Maximum Velocity
Syntax Example CVEL 100
Program Sample CMODE_01.M
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DEC
Summary sets deceleration
Syntax DEC a
Parameter a = deceleration
Description The DEC command defines the deceleration for the next motion command (speed
control synchronization or positioning). This value will remain valid until a new
deceleration value is set with another DEC command. The value is related to the
parameters 32-81
Shortest Ramp and 32-80 Maximum Velocity as well as 32-83
Velocity Resolution .
NB!:
If deceleration is not defined previous to the positioning command then decele-
ration will be the setting of parameter 32-85 Default Acceleration .
NB!:
If you work with the MCO 305 then you should always set the ramps via the option
card and not in the FC 300. The FC ramps must always be set to minimum.
Command Group REL, ABS
Cross Index ACC,
Parameters: 32-81
Shortest Ramp , 32-80 Maximum Velocity , 32-83 Velocity
Resolution
Syntax Example ACC 50 /* acceleration: 50, while braking 10 */
DEC 10
Example minimum acceleration time: 1000 ms
maximum velocity: 1500 RPM
velocity resolution: 100