CERUS CI-007-P2, Installation, Programming Operation, & Maintenance Manual

Page: 70 / 137

Chapter 6 - Parameter Description
6-3
SET Acc. time
11 20.0 sec
SET Dec. time
12 30.0 sec
parameter DRV-00. Use the [Shift] key to move the
flashing cursor to proper position to make fast or
slow change of the speed reference value.
When V1 is selected, the VFD speed is
controlled by 0-10VDC analog input signal from
BMS, PLC, potentiometer or other control device.
This input is polarity sensitive with V1 terminal as
signal positive and 5G (up to 40HP) or CM
terminal as negative. The voltage input is very
sensitive to any electrical noise so shielded cable
should be used. The input range is adjustable in I/O
group parameters from 0 to 12VDC.
When
V1S is selected, the VFD speed is
controlled by bipolar ±10VDC analog input signal
from PLC, potentiometer or other control device.
The polarity of the signal corresponding to analog
common 5G (up to 40HP) or CM determines
Forward or Reverse direction and the absolute
value of the signal changes the speed reference. The
voltage input is very sensitive to any electrical
noise so shielded cable should be used. The input
range is adjustable in I/O group parameters up to
±12VDC.
When I is selected, the VFD speed is controlled
by 4-20mA analog input signal from BMS, PLC or
other control device. This input is polarity sensitive
with I terminal as signal positive and 5G (up to
40HP) or CM terminal as negative. The current
input is less sensitive to any electrical noise but
shielded cable is recommended. The input range is
adjustable in I/O group parameters.
When V1+I is selected, the VFD speed is
controlled by both 0-10VDC and 4-20mA analog
input signals from BMS, PLC, potentiometer or
other control device. Both analog signals are
compared with each other and the greatest value
determines the VFD speed reference. The inputs
can be selected by digital input set to ANA_CHG
(Analog change). The input ranges are adjustable in
I/O group parameters.
When Pulse is selected, the VFD speed is
controlled by the frequency of the pulses on A0 and
B0 input terminals from counter, encoder or other
control device. The input range is adjustable in I/O
group parameters.
When
Int.485 is selected, the VFD speed is
controlled via Modbus-RTU communication from
BMS, Process Controller, PLC or other control
device. See parameter mapping in Parameter list.
) 6 + % " ! ! " !
The VFD increases and decreases the output
Voltage and Frequency using acceleration and
deceleration time.
If parameter FG1-73 is set to Max. Frequency ,
the ACC or DEC time will be applied from 0Hz to
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