Digital Inputs
The digital inputs can be used for controlling various adjustable frequency drive functions.
Digital Outputs
The drive features two solid state outputs that can supply a 24 V DC (max. 40 mA) signal.
DSP
Digital Signal Processor.
Relay Outputs:
The adjustable frequency drive features two programmable relay outputs.
ETR
Electronic Thermal Relay is a thermal load calculation based on present load and time. Its purpose is to estimate the motor temperature.
GLCP:
Graphical Local Control Panel (LCP102)
Initializing
If initializing is carried out (par. 14-22), the programmable parameters of the adjustable frequency drive return to their default settings.
Intermittent Duty Cycle
An intermittent duty rating refers to a sequence of duty cycles. Each cycle consists of an on-load and an off-load period. The operation can be either
periodic duty or non-periodic duty.
LCP
The Local Control Panel (LCP) makes up a complete interface for control and programming of the adjustable frequency drive. The control panel is
detachable and can be installed up to 9.8 ft [3 m] from the adjustable frequency drive, i.e., in a front panel by means of the installation kit option.
The local control panel is available in two versions:
- Numerical LCP101 (NLCP)
- Graphical LCP102 (GLCP)
lsb
Least significant bit.
MCM
Short for Mille Circular Mil, an American measuring unit for cable cross-section. 1 MCM ≡ 0.00079 in
2
(0.5067 mm
2
).
msb
Most significant bit.
NLCP
Numerical Local Control Panel LCP101
On-line/Off-line Parameters
Changes to on-line parameters are activated immediately after the data value is changed. Changes to offline parameters are not activated until you enter
[OK] on the LCP.
PID Controller
The PID controller maintains the desired speed, pressure, temperature, etc., by adjusting the output frequency to match the varying load.
1 How to Read this Design Guide VLT
®
AQUA Drive Design Guide
1-6
MG.20.N5.22 - VLT
®
is a registered Danfoss trademark
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