49
211
Preset Reference 1
(PRESET REF. 1)
212
Preset Reference 2
(PRESET REF. 2)
213
Preset Reference 3
(PRESET REF. 3)
214
Preset Reference 4
(PRESET REF. 4)
Value:
-100.00 % to +100.00 %
★
0.00%
of the reference range or external reference
Function:
Four different preset references can be programmed in parameters 211
to 214,
Preset Reference
. The preset reference is stated as a
percentage of the reference range or as a percentage of the other
external references, depending upon the choice made in parameter
210,
Reference Type
.
The choice of preset references is made by activating terminals 16, 17,
29, 32 or 33, as shown in the table below.
Terminal 17/29/33
Terminal 16/29/32
preset reference msb
preset reference lsb
0
0
Preset reference 1
0
1
Preset reference 2
1
0
Preset reference 3
1
1
Preset reference 4
Description of choice:
Set the required preset reference(s) that is/are to be used.
215
Current Limit
(CURRENT LIMIT)
Value:
0.1 to 1.1 x rated current
★
rated current
Function:
This is where the maximum output current is set. If the motor attempts to
draw more than this amount of current, the drive will reduce its output
frequency until the current is less than or equal to the current limit
value.
The factory setting corresponds to the rated output current. If the
current limit is to be used as motor protection, the rated motor current
must be set. If the current limit is set within the range of 1.0 to 1.1 times
the rated output current of the drive, the drive can only handle current
greater than its rated output intermittently. After the load has been higher
than rated output current limit, it must be reduced to a level that is lower
than the rated current of the drive for a period of time.
Note that if the current limit is set to less than the maximum value of the
drive, acceleration torque is reduced correspondingly.
Description of choice:
Set the required maximum output current.
NOTE
When drive is in current limit and a stop
command is issued by pressing the STOP key
on LCP keypad, drive output is immediately cut
off and motor will coast-to-stop.
216
Frequency Bypass, Bandwidth
(FREQUENCY BYPASS B.W.)
Value:
0 (OFF) to 100 Hz
★
DISABLED
Function:
Mechanical resonance in the driven system sometimes makes it
desirable to avoid operation at critical speeds.
These output frequencies can be programmed in parameters 217
through 220.
In this parameter,
Frequency Bypass, Bandwidth
, the width of the
frequency to be bypassed is defined.
Description of choice:
The bypass bandwidth is equal to the programmed bandwidth
frequency. This bandwidth will be centered around each bypass
frequency.
217
Frequency Bypass 1
(BYPASS FREQ. 1)
218
Frequency Bypass 2
(BYPASS FREQ. 2)
219
Frequency Bypass 3
(BYPASS FREQ. 3)
220
Frequency Bypass 4
(BYPASS FREQ. 4)
Value:
0 to 120 or 1000 H
Z
★
120.0 Hz
The frequency range depends on the selection made in parameter
200,
Output Frequency Range
.
Function:
Some systems require that some output frequencies be avoided
because of mechanical resonance problems in the system.
Description of choice:
Enter the frequencies to be avoided.
See also parameter 216,
Frequency Bypass, Bandwidth.
✭
I
ndicates factory default setting. Numbers in brackets [ ] represent selection as displayed on the serial bus.
