Danfoss Metasys N2 Instruction Manual

Group Title Function
3-** Reference/Ramps Parameters used to program the following:
•
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.
•
Denition of the source of each reference (for example, to which analog input is the
reference signal connected).
•
Ramp-up and ramp-down times.
•
Digital potentiometer settings.
4-** Limits/Warnings Parameters used to program limits and warnings of operation including:
•
Allowable motor direction.
•
Minimum and maximum motor speeds. As an example, in pump applications the minimum
speed is often set to approximately 30–40%. This speed ensures that pump seals are always
adequately lubricated, avoid cavitation and ensure that adequate head is always produced to
create ow).
•
Torque and current limits to protect the pump, fan or compressor driven by the motor.
•
Warnings for low/high current, speed, reference, and feedback.
•
Missing motor phase protection.
•
Speed bypass frequencies, including semi-automatic set-up of these frequencies (for example,
to avoid resonance conditions on cooling tower and other fans).
5-** Digital In/Out Parameters used to programme the functions of all
•
digital inputs
•
digital outputs
•
relay outputs
•
pulse inputs
•
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 control card terminals and general purpose I/O option (MCB 101). The parameters
include:
•
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 lter out electrical noise on the analog signal, which sometimes occurs
when long cables are installed.
•
Function and scaling of the analog outputs (for example. to provide an analog output
representing motor current or kW to an analog input of a DDC controller).
•
Conguring the analog outputs to be controlled by the BMS via a high-level interface (HLI)
(for example to control a chilled water valve) including ability to dene a default value of
these outputs in the event of the HLI failing.
8-** Communication and
Options
Parameters used for conguring and monitoring functions associated with the serial communi-
cations/high-level interface to the adjustable frequency drive.
9-** Probus Parameters only applicable when a PROFIBUS option is installed.
10-** CAN Fieldbus Parameters only applicable when a DeviceNet option is installed.
How to Program Instruction Manual
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Danfoss Metasys N2 Specifications

General

Brand	Danfoss
Model	Metasys N2
Category	DC Drives
Language	English