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6-36
Drive Control
Functional Description
Fine Interpolator
Units of the Processed Data
Open-Loop U/f Control
Diagnostic and Status Messages
Monitoring the Velocity Limit
Pertinent Diagnostic Messages
• F8079 Velocity limit S-0-0091 exceeded
When the drive is running in open-loop operation (open-loop U/f control),
the preset velocity command value can be smoothed by a fine interpolator
via 2 steps.
velocity command
value
S-0-0037:
additive velocity command value
P-0-0048:
effective velocity command value
P-0-0556:
control word of axis controller
Fig. 6-24:
Fine interpolation of the velocity command value
Note:
The fine interpolator can be activated via bit 0 in parameter
P-0-0556, Control word of axis controller.
The physical data for velocity control have the following units:
• velocity data:
• acceleration data:
• torque data:
Note:
The fine interpolator can be activated via bit 0 in parameter
P-0-0556, Control word of axis controller.
The output variable of the fine interpolator (P-0-0048) is used as the input
variable for the subsequent open-loop U/f control which is described in
the section "Motor Control: Voltage-Controlled Operation".
The actual velocity value generated internally via the stall protection loop
Value
is monitored with regard to the limit value of 1.125 * S-0-0091 (bipolar
velocity limit value). When the limit value is exceeded, the following error
message is generated:
• F8079 Velocity limit S-0-0091 exceeded
command value
fine interpolation
+
Bit 0
S-0-0037
P-0-0556
rpm or mm/min
(rpm)/controller clock or (mm/min)/contr. clock
Nm or N
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
MPH-02, MPB-02, MPD-02
P-0-0048
S-0-0091
DF000113v01_en.fh7
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