Danfoss VLT HVAC, Руководство по программированию

Страница: 9 / 99

Break-away torque
175ZA078.10
Pull-out
rpm
Torque
η
VLT
The efficiency of the frequency converter is defined as the
ratio between the power output and the power input.
Start-disable command
A stop command belonging to the group 1 control
commands - see this group.
Stop command
See Control commands.
References:
Analog Reference
A signal transmitted to the analog inputs 53 or 54, can be
voltage or current.
Binary Reference
A signal transmitted to the serial communication port.
Preset Reference
A defined preset reference to be set from -100% to +100% of
the reference range. Selection of eight preset references via
the digital terminals.
Ref
MAX
Determines the relationship between the reference input at
100% full scale value (typically 10 V, 20mA) and the resulting
reference. The maximum reference value set in
3-03 Maximum Reference .
Ref
MIN
Determines the relationship between the reference input at
0% value (typically 0V, 0mA, 4mA) and the resulting
reference. The minimum reference value set in
3-02 Minimum
Reference .
Miscellaneous:
Analog Inputs
The analog inputs are used for controlling various functions
of the frequency converter.
There are two types of analog inputs:
Current input, 0-20mA and 4-20mA
Voltage input, 0-10V
Analog Outputs
The analog outputs can supply a signal of 0-20mA, 4-20mA.
Automatic Motor Adaptation, AMA
AMA algorithm determines the electrical parameters for the
connected motor at standstill.
CTW
Control Word
Digital Inputs
The digital inputs can be used for controlling various
functions of the frequency converter.
ETR
Electronic Thermal Relay is a thermal load calculation based
on present load and time. Its purpose is to estimate the
motor or frequency converter temperature.
Initialising
If initialising is carried out (
14-22 Operation Mode ), the
frequency converter returns to the default setting.
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 makes up a complete interface for
control and programming of the frequency converter. The
control panel is detachable and can be installed up to 3
metres from the frequency converter, i.e. in a front panel by
means of the installation kit option.
lsb
Least significant bit.
msb
Most significant bit.
MCM
Short for Mille Circular Mil, an American measuring unit for
cable cross-section. 1 MCM = 0.5067mm
2
.
Process PI
The PI control maintains the desired speed, pressure,
temperature, etc. by adjusting the output frequency to
match the varying load.
Power Cycle
Switch off the mains until display (LCP) is dark – then turn
power on again.
RCD
Residual Current Device.
Introduction VLT HVAC Basic Drive Programming Guide
8 MG.18.B1.02 - VLT
®
is a registered Danfoss trademark
1 1