Emerson EV1000-2S0004G User Manual page 36

34 Chapter 5 Parameters
The reference value is based on 10V (i.e. 10V means 100%
input) ; and the feedback value is based on 20mA (20mA
corresponds to 100% output) .
Close-loop characteristic is selected through F5.16 to satisfy
different applications.
In order to meet the control requirements, the motor's speed
should be increased with reference speed. This kind of
control characteristic is called positive response. If the motor
speed is required to be decreased when the reference value
is increased, this control characteristic is called negative
response.
See Figure 5-32. F5.16 defines the two characteristics.
Speed
Figure 5-32 Close-loop Control Characteristics
After the system type is determined, the following
procedures can be used to determine the close loop
parameters:
Determine the close-loop reference and feedback
channel (F5.01 and F5.02) ;
Define the relationship between close-loop reference
and feedback value (F5.08~F5.11) ;
Determine the speed reference of speed close-loop
control and the number of revolutions of PG
(F5.06~F5.07) ;
Determine the close-loop regulation characteristic, that
is, if the motor speed decreases while the input
reference increases, then the close-loop control
characteristic should be set to negative (F5.16=1) ;
Set integral regulation and close-loop frequency
(F5.17~F5.19) ;
Adjust close-loop filter time, sampling cycle, bias limit
and gain factor (F5.12~F5.15) .
F5.00 Close loop control
0: disabled
1: enabled
F5.01 Reference input method Range: 0~4 【 1 】
0: digital setting
Take the value of F5.05 (set analog close loop feedback,
F5.02＝0~5) ;
Take the value of F5.06, (set pulse close loop feedback,
F5.02＝6) .
1: VCI (0~10V)
2: CCI
Positive
Negative
Close loop
reference
Range: 0, 1 【 0 】
EV1000 Series General Purpose Variable Speed Drive User Manual
Pay attention to the setting of jumper CN10.
3: Keypad
4: PULSE
Note
The motor speed is controlled by pulse feedback. Given analog
input 10V (20mA) or max. input frequency F1.03, the output
pulse will be max. frequency F0.05, which corresponds to the
motor synchronous speed n
0
F5.02 Feedback method
0: VCI analog voltage 0~10V
1: CCI analog input
2: VCI + CCI
3: VCI-CCI
4: Min {VCI,CCI}
5: Max {VCI, CCI}
When current input is selected, the signal will be converted
to voltage signal, whose value is determined by the formula:
Vout=mA/2;
F5.02=6, pulse
It can be single-phase or 2-phase PG close loop feedback.
Please refer to multi-function input terminal X4, X5
(F7.03~F7.04) .
F5.03 Input filter
F5.04 Feedback filter
Both the input signal and feedback signal have some noise
signals. These signals can be filtered by setting the time
constant of filter (settings of F5.03 and F5.04) . The bigger
the time constant, the better the immunity capability, but the
response becomes slow. The smaller the time constant, the
faster the response, but the immunity capability becomes
weak.
F5.05 Digital reference input
When analog feedback is selected (F5.02=0~5) , this
function allows parameter setting from keypad or serial port.
F5.06 Speed close-loop setting
When PG pulse feedback is selected (F5.02=6) , speed can
be set through keypad or serial port.
F5.07 Pulse number per
revolution of encoder
Please set this parameter according to the characteristics of
the pulse encoder.
F5.08 Min. input
F5.09 Feedback of min. input
F5.10 Max. input
F5.11 Feedback of max. input
F5.08~F5.11 define the relation of analog close loop input
and feedback. The values of the above parameters are
＝120fmax/P) .
(n
0
Range: 0~6 【 1 】
Range: 0.01~50.00s 【 0.50s 】
Range: 0.01~50.00s 【 0.50s 】
Range: 0.00~10.00V 【 0.00 】
Range: 0~39000rpm 【 0 rpm 】
Range: 1~9999 【 1024 】
Range: 0.0%~F5.10 【 0.0% 】
Range: 0.0~100.0% 【 20.0% 】
Range: F5.08~100.0% 【 100.0% 】
Range: 0.0~100.0% 【 100.0% 】