6 How to Programme
6.1.1 Parameter Set-Up
Group
Title
Function
0**
Operation and Display
Parameters used to program the fundamental functions of the frequency converter and the LCP in-
cluding: selection of language; selection of which variables are displayed at each position in the dis-
play (e.g. static duct pressure or condenser water return temperature can be displayed with the set-
point in small digits in the top row and feedback in large digits in the centre of the dispay); enabling/
disabling of the LCP keys/buttons; passwords for the LCP; upload and download of commissioned pa-
rameters to/from the LCP and setting the built in clock.
1**
Load / Motor
Parameters used to configure the frequency converter for the specific application and motor including:
open or closed loop operation; type of application such as compressor, fan or centrifugal pump; motor
nameplate data; auto-tuning of the drive to the motor for optimum performance; flying start (typically
used for fan applications) and motor thermal protection.
2**
Brakes
Parameters used to configure braking functions of the frequency converter which although not com-
mon in many HVAC applications, can be useful on special fan applications. Parameters including: DC
braking; dymamic/resistor braking and over voltage control (which provides automatic adjustment of
the deceleration rate (auto-ramping) to avoid tripping when decelerating large inertia fans)
3**
Reference / Ramps
Parameters used to program the minimum and maximum reference limits of speed (RPM/Hz) in open
loop or in actual units when operating in closed loop); digital/preset references; jog speed; definition
of the source of each reference (e.g. which analog input the reference signal is connected to); ramp
up and down times and digital potentiometer settings.
4**
Limits / Warnings
Parameters used to program limits and warnings of operation including: allowable motor direction;
minimum and maximum motor speeds (e.g. in pump applications it is typical to program a minimum
speed to approx 30-40% to ensure pump seals are adequately lubricated at all times, avoid cavitation
and ensure adequate head is produced at all times to create flow); torque and current limits to pro-
tect the pump, fan or compressor driven by the motor; warnings for low/high current, speed, refer-
ence, and feedback; missing motor phase protection; speed bypass frequencies including semi-auto-
matic setup of these frequencies (e.g. to avoid resonance conditions on cooling tower and other fans).
5**
Digital In / Out
Parameters used to program the functions of all digital inputs, digital outputs, relay outputs, pulse in-
puts and pulse outputs for terminals on the control card and all option cards.
6**
Analog In / Out
Parameters used to program the functions associated with all analog inputs and analog outputs for
the terminals on the control card and General Purpose I/O option (MCB 101) (note: NOT Analog I/O
option MCB 109, see parameter group 26-00) including: analog input live zero timeout function (which
for example can be used to command a cooling tower fan to operate at full speed if the condenser
water return sensor fails); scaling of the analog input signals (for example to match the analog input
to the mA and pressure range of a static duct pressure sensor); filter time constant to filter out elec-
trical noise on the analog signal which can sometimes occur when long cables are installed; function
and scaling of the analog outputs (for example to provide an analog output representing motor cur-
rent or kW to an analog input of a DDC controller) and to configure the analog outputs to be control-
led by the BMS via a high level interface (HLI) (e.g. to control a chilled water valve) including ability to
define a default value of these outputs in the event of the HLI failing.
8**
Communication and Options Parameters used for configuring and monitoring functions associated with the serial communications /
high level interface to the frequency converter
9**
Profibus
Parameters only applicable when a Profibus option is installed.
10**
CAN Fieldbus
Parameters only applicable when a DeviceNet option is installed.
11**
LonWorks
Parameters only applicable when a Lonworks option is installed.
13**
Smart Logic Controller
Parameters used to configure the built in Smart Logic Controller (SLC) which can be used for simple
functions such as comparators (e.g. if running above xHz, activate output relay), timers (e.g. when a
start signal is applied, first activate output relay to open supply air damper and wait x seconds before
ramping up) or a more complex sequence of user defined actions executed by the SLC when the asso-
ciated user defined event is evaluated as TRUE by the SLC. (For example, initiate an economiser
mode in a simple AHU cooling application control scheme where there is no BMS. For such an applica-
tion the SLC can monitor the outside air relative humidity and if it is below a defined value, the supply
air temperature setpoint could be automatically increased. With the frequency converter monitoring
VLT HVAC Drive High Power Operating In-
structions
6 How to Programme
MG.11.F3.02 - VLT
®
is a registered Danfoss trademark
91
6