Lenze PositionServo 940, Руководство пользователя

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S94P01B
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6.3.1.3 Position mode
In this mode the drive reference is a pulse-train applied to P3.1-4 terminals, if the
parameter “Reference” is set to “External”. Otherwise the reference is taken from
the drive’s internal variable. (See Programmer’s manual for details).
P3.1-4 inputs can be configured for two types of signals: step and direction and
Master encoder quadrature signal. Refer to section 5.2.1 for details on these
inputs connections. Refer to section 8.3 for details about positioning and gearing.
When the Reference is set to Internal, the drives reference position, (theoretical
or Target position), is generated by trajectory generator. Access to the trajectory
generator is provided by motion statements, MOVEx and MDV, from the User
Program. See Programmer’s manual for details
6.3.2 Drive PWM frequency
This parameter sets the PWM carrier frequency. Frequency can be changed only
when the drive is disabled. Maximum overload current is 300% of the drive rated
current when the carrier is set to 8kHz, it is limited to 250% at 16kHz.
6.3.3 Current Limit
The CURRENT LIMIT setting determines the nominal current, in amps RMS per phase.
6.3.4 8 kHz Peak current limit and 16 kHz Peak current limit
Peak current sets the motor RMS phase current that is allowed for up to 2 seconds.
After this two second limit, the current limit will be reduced to the value set in the
Current Limit parameter. When the motor current drops below nominal current for two
seconds, the drive will automatically re-enable the peak current level. This technique
allows for high peak torque on demanding fast moves and fast start/stop operations
with high regulation bandwidth. The control will use only the Peak current limit
parameter for the carrier frequency selected.
6.3.5 Analog input scale (Current scale)
This parameter sets the analog input sensitivity for current reference used when the
drive operates in Torque mode. Units for this parameter are A/Volt. To calculate this
value use the following formula:
Iscale = Imax / Vin max
Imax maximum desired output current (motor phase current RMS)
Vin max max voltage fed to analog input at Imax
Example: Imax = 5A (phase RMS)
Vin max = 10V
Iscale = Imax / Vin max = 5A / 10V = 0.5 A / Volt (value to enter)
6.3.6 Analog input scale (Velocity scale)
This parameter sets the analog input sensitivity for the velocity reference used
when the drive operates in Velocity mode. Units for this parameter are RPM/Volt. To
calculate this value use the following formula:
Vscale = VELOCITYmax / Vin max
VELOCITYmax maximum desired velocity in RPM
Vin max max voltage fed to analog input at Velocity
max
Example: VELOCITYmax = 2000 RPM
Vin max = 10V
Vscale = VELOCITYmax / Vin max
= 2000 / 10V
= 200 RPM / Volt (
value to enter
)