Danfoss vlt aqua User Manual

[74] m WG
[75] mm Hg
[80] kW
[120] GPM
[121] gal/s
[122] gal/min
[123] gal/h
[124] CFM
[125]
ft
3
/s
[126]
ft
3
/min
[127]
ft
3
/h
[130] lb/s
[131] lb/min
[132] lb/h
[140] ft/s
[141] ft/min
[145] ft
[160] °F
[170] psi
[171]
lb/in
2
[172] in WG
[173] ft WG
[174] in Hg
[180] HP This parameter determines the unit that is used for the setpoint reference and feedback that the
PID controller will use for controlling the output frequency of the adjustable frequency drive.
20-21 Setpoint 1
Range: Function:
0.000 Proc-
essCtrlU-
nit*
[-999999.999 - 999999.999 Proc-
essCtrlUnit]
Setpoint 1 is used in closed-loop mode to enter a setpoint reference that is used by the adjustable
frequency drive’s PID controller. See the description of par. 20-20
Feedback Function .
NOTE!
Setpoint reference entered here is added to any other references that are enabled
(see par. group 3-1*).
20-81 PID Normal/Inverse Control
Option: Function:
[0] * Normal
[1] Inverse
Normal [0] causes the adjustable frequency drive’s output frequency to decrease when the feedback
is greater than the setpoint reference. This is common for pressure-controlled supply fan and pump
applications.
Inverse [1] causes the adjustable frequency drive’s output frequency to increase when the feedback
is greater than the setpoint reference.
5 How to program the adjustable frequency
drive
VLT AQUA High Power Instruction Manual
5-36 MG.20.P3.22 - VLT
®
is a registered Danfoss trademark
5

Danfoss vlt aqua Specifications

General

Supply Voltage	200-240V, 380-500V, 525-600V
Enclosure	IP20
Features	Energy optimization
Approvals	CE, UL, cUL
Input Voltage Range	200-240V, 380-500V, 525-600V
Output Voltage Range	0 to supply voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Short circuit, Ground fault
Communication Interfaces	PROFIBUS
Cooling Method	Air-cooled