VLT
®
Series 3500
65
★
= ROM default setting.
✔
= Normal Danfoss setup. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
115 Display Value at Minimum Feedback
(DIS VLU@mi)
Value:
0 to 9999
★
0
Function:
Parameters 115 and 116 are used to scale a display read-
out which is proportional to a feedback transmitter signal.
The value is displayed if feedback has been selected in
Display mode.
Description of choice:
If a transmitter, for example, has a range of 2 to 10 in wg, 2
can be programmed in parameter 115 and 10 in parameter
116. In parameter 117 the unit, in wg, [23], is chosen.
116 Display Value at Maximum Feedback
(DIS VLU@ma)
Value:
0 to 9999
★
100
Function & Description of choice:
Same as parameter 115, except sets the maximum..
117 Display Unit (DISPLAY UN)
Value:
★
%
[0]
°
F
[21]
°
C
[1]
PPM
[22]
PPM
[2]
in wg
[23]
Pa
[3]
bar
[24]
bar
[4]
RPM
[25]
RPM
[5]
gal/s
[26]
l/s.
[6]
ft
3
/s
[27]
m
3
/s.
[7]
gal/min.
[28]
l/min.
[8]
ft
3
/min.
[29]
m
3
/min.
[9]
gal/h
[30]
l/h
[10]
ft
3
/h
[31]
m
3
/h
[11]
lb/s
[32]
kg/s.
[12]
lb/min.
[33]
kg/min.
[13]
lb/h
[34]
kg/h
[14]
t/min.
[35]
t/h
[15]
ft
[36]
m
[16]
lb ft
[37]
Nm
[17]
ft/s
[38]
m/s.
[18]
ft/min.
[39]
m/min.
[19]
mVs
[40]
(no unit)
[20]
lb/in
2
[41]
Function:
Choose the values that are to be shown in the Display
mode together with the feedback value. Scaling of the dis-
play readout is carried out in parameters 115 and 116.
Description of choice:
Sets the units to be scaled.
Parameters 119 through 125 are used only for
PID control.
119 FF Factor (FEED FWD F)
Value:
0 to 500%
★
100%
Function:
This parameter is used in connection with a PID controller.
The FF function makes a large or small part of the refer-
ence signal (setpoint) bypass the PID controller. This
means that the PID controller only affects part of the control
signal. Any change of the setpoint will affect the motor rpm
directly. This parameter can be used to tune and stabilize
the system.
Description of choice:
The feed forward factor is selected if the desired reference
signal (setpoint) does not lead to the right start frequency.
See the section on the PID controller at the end of the pa-
rameter section.
