Special Functions; Fc Information; Data Readouts; Info & Readouts - Danfoss FC 100 Instruction Manual

VLT ® HVAC DRIVE High Power
Instruction Manual
Group
14-
15-
16-
18-
20-
21-
22-
23-
24-
25-
26-
Title Function

Special Functions

Parameters used to configure special functions of the adjustable frequency drive in-
cluding: setting of the switching frequency to reduce audible noise from the motor
(sometimes required for fan applications); kinetic backup function (especially useful
for critical applications in semi-conductor installations where performance under line
power dip/line power loss is important); Line imbalance protection; automatic reset
(to avoid the need for a manual reset of alarms); energy optimization parameters
(which typically do not need changing but enable fine tuning of this automatic func-
tion (if necessary) ensuring the adjustable frequency drive and motor combination
operate at their optimum efficiency at full and partial load conditions) and auto-de-
rating functions (which enable the adjustable frequency drive to continue operation
at reduced performance under extreme operating conditions ensuring maximum up
time).

FC Information

Parameters providing operating data and other drive information including: operating
and running hour counters; kWh counter; resetting of the running and kWh counters;
alarm/fault log (where the past 10 alarms are logged along with any associated value
and time) and drive and option card indentification parameters such as code number
and software version.

Data Readouts

Read-only parameters which display the status/value of many operating variables
which can be displayed on the LCP or viewed in this parameter group. These pa-
rameters can be particularly useful during commissioning when interfacing with a
BMS via a high level interface.
Info & Readouts Read-only parameters which display the last 10 prevantative maintenance log items,
actions and time and the value of analog inputs and outputs on the analog I/O option
card which can be particularly useful during commissioning when interfacing with a
BMS via a high level interface.

FC Closed-loop

Parameters used to configure the closed-loop PI(D) controller which controls the
speed of the pump, fan or compressor in closed-loop mode including: defining where
each of the 3 possible feedback signals come from (e.g., which analog input or the
BMS HLI); conversion factor for each of the feedback signals (e.g., where a pressure
signal is used for indication of flow in an AHU or converting from pressure to tem-
perature in a compressor application); engineering unit for the reference and feed-
back (e.g., Pa, kPa, m Wg, in Wg, bar, m3/s, m3/h, °C, °F, etc.); the function (e.g.,
sum, difference, average, minimum or maximum) used to calculate the resulting
feedback for single zone applications or the control philosophy for multi-zone appli-
cations; programming of the setpoint(s) and manual or auto-tuning of the PI(D) loop.
Extended Closed-loop Parameters used to configure the 3 extended closed-loop PI(D) controllers which,
for example, can be used to control external actuators (e.g., chilled water valve to
maintain supply air temperature in a VAV system) including: engineering unit for the
reference and feedback of each controller (e.g. °C, °F, etc.); defining the range of
the reference/setpoint for each controller; defining where each of the references/
setpoints and feedback signals come from (e.g., which analog input or the BMS HLI);
programming of the setpoint and manual or auto-tuning of the each of the PI(D)
controllers.

Application Functions

Parameters used to monitor, protect and control pumps, fans and compressors in-
cluding: no-flow detection and protection of pumps (including auto-setup of this
function); dry pump protection; end of curve detection and protection of pumps;
sleep mode (especially useful for cooling tower and booster pump sets); broken belt
detection (typically used for fan applications to detect no air flow instead of using a
∆p switch installed across the fan); short cycle protection of compressors and pump
flow compensation of setpoint (especially useful for secondary chilled water pump
applications where the ∆p sensor has been installed close to the pump and not acoss
the furthest most significant load(s) in the system; using this function can compen-
sate for the sensor installation and help to realize the maximum energy savings).
Time-based Functions Time-based parameters including: those used to initiate daily or weekly actions based
on the built-in real time clock (e.g., change of setpoint for night setback mode or
start/stop of the pump/fan/compressor start/stop of external equipment); preven-
tative maintenance functions which can be based on running or operating hour time
intervals or on specific dates and times; energy log (especially useful in retrofit ap-
plications or where information of the actual historical load (kW) on the pump/fan/
compressor is of interest); trending (especially useful in retrofit or other applications
where there is an interest to log operating power, current, frequency or speed of the
pump/fan/compressor for analysis and a payback counter.
Application Functions 2 Parameters used to set up fire mode and/or to control a bypass contactor/starter if
designed into the system.

Cascade Controller

Parameters used to configure and monitor the built-in pump cascade controller (typ-
ically used for pump booster sets).

Analog I/O Option MCB

Parameters used to configure the analog I/O option (MCB109) including: definition
109 of the analog input types (e.g., voltage, Pt1000 or Ni1000) and scaling and definition
of the analog output functions and scaling.
MG.11.F1.22 - VLT ® is a registered Danfoss trademark.
4. How to Program
4
83