Sako SKI600, Manual

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098
F6.07
AI2 input lower limit
0.00V ～ 10.00V
0.00
F6.08
AI2 lower limit corresponding physical
quantity setting
-200.0% ～ 200.0%
0.0%
F6.09
AI2 input upper limit
0.00V ～ 10.00V
10.00
F6.10
AI2 upper limit corresponding
physical quantity setting
-200.0% ～ 200.0%
100.0%
F6.11
AI2 input filtering time
0.00S ～ 10.00S
0.05
When analog input signal shows frequent
fluctuation around the set point, set F6.12 to
restrain the frequency fluctuation caused by
this fluctuation.
F6.12
Error limit of analog input
0.00V ～ 10.00V
0.10
When F0.18=1 (high frequency mode), the
upper limit of this function code is 500.0Hz.
F6.13
Threshold of zero-frequency operation
Zero-frequency hysteresis
～ 50.00Hz
0.00
These above function codes defined input
range of analog input voltage channel AI1,
AI2, and the corresponding physical quantity
percentage and filtering time constant. AI1 can
be chosen as voltage/current input via J1 wire
jumper, and the digital setting can be based
on the relation of 0 ～ 20mA in accordance
with 0 ～ 10V. The specific setting should be
depended on the actual condition of input
signal.
AI1, AI2 input filtering time constant are used
for filtering process of analog input signal,
thus eliminating the disturbing influence. The
greater of the time constant, the better of the
anti-interference ability, and the steadier of
the control, but the slower of the response;
otherwise, the smaller of the time constant,
the faster of the response, but the weaker of
the anti-interference ability, and the control
may not be steady. If the optimum value can't
be decided in practical application, make
appropriate adjustment for this parameter
based on whether the control is steady and
response delay condition.
These two function codes are used to set
zero-frequency hysteresis control function.
Take analog AI1 current setting channel for
example, as showed in Fig. F6-1.
Start process:
After start command is sent, only when analog
AI1 current input reaches or exceeds value Ib
and the according frequency reaches fb, the
motor can start and speed up according to
accelerating time until reaching the according
frequency of analog AI1 current input.
Stop process:
When AI1 current falls to value Ib during
running, the VFD won't stop immediately. Only
when AI1 current falls to Ia and the according
F6.14
Zero-frequency hysteresis
0.00 ～ zero-frequency
running threshold value
0.00
4.2 Detailed Function Description