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Application Manual CDA3000
5 Software functions
5.5.11_64CA-Current-
controlled
startup
Parameters of current-controlled startup/rundown
Note: When setting the parameter values manually in VFC mode,
please pay attention to the information set out in section 6.1.5
“Tips and optimization aids for control engineers” (step 3),
otherwise the “current-controlled startup” function may nega-
tively affect the “current injection” function.
Function Effect
• The drive accelerates with
the preset acceleration ramp.
When a programmable
current limit is reached the
acceleration is slowed or
stopped, depending on
selected function, until suffi-
cient current reserves are
available again.
• The same applies to deceler-
ation of the drive.
• Protection against current
overload shut-off in acceler-
ation of large moments of
inertia
• Protection against drive
stalling
• Acceleration and decelera-
tion processes with maxi-
mum dynamics along the
current limit
Parameter Function Value range FS Unit Online
639-CLTF Filter time constant for current-controlled
startup/rundown
0.002 ... 20 0.01 s
640-CLSL1 CDS1: Function selector 0 ... 2 2
641-CLCL1 CDS1: Current limit value 0 ... 200 100 %
642-CLFL1 CDS1: Lowering frequency 0 ... 100 4 Hz
643-CLFR1 CDS1: Initial frequency 0 ... 1600 0 Hz
644-CLRR1 CDS1: Lowering ramp 0 ... 1600 100 Hz
645-CLSL2 CDS2: Function selector 0 ... 2 2
646-CLCL2 CDS2: Current limit value 0 ... 200 100 %
647-CLFL2 CDS2: Lowering frequency 0 ... 100 4 Hz
648-CLFR2 CDS2: Initial frequency 0 ... 1600 0 Hz
649-CLRR2 CDS2: Lowering ramp 0 ... 1600 100 Hz
Table 5.80 Parameters of subject area _64CA Current-controlled startup
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