Miscellaneous - Danfoss VLT HVAC Drive FC 131 Programming Manual

VLT® HVAC Drive FC 131
Programming Guide
A signal transmitted to the analog inputs 53 or 54 can be voltage or current.
• Current input: 0–20 mA and 4–20 mA
• Voltage input: 0–10 V DC
Bus reference
A signal transmitted to the serial communication port (FC port).
Binary reference
A signal transmitted via the serial communication port.
Preset reference
A defined preset reference to be set from -100% to +100% of the reference range. Selection of 8 preset references via the digital
terminals. Selection of 4 preset references via the bus.
Ref
MAX
Determines the relationship between the reference input at 100% full scale value (typically 10 V, 20 mA) and the resulting reference.
The maximum reference value is set in parameter 3-03 Maximum Reference.
Ref
MIN
Determines the relationship between the reference input at 0% value (typically 0 V, 0 mA, 4 mA) and the resulting reference. The
minimum reference value is set in parameter 3-02 Minimum Reference.

6.2.5 Miscellaneous

Analog inputs
The analog inputs are used for controlling various functions of the drive.
There are 2 types of analog inputs:
• Current input: 0–20 mA and 4–20 mA.
• Voltage input: 0–10 V DC.
Analog outputs
The analog outputs can supply a signal of 0–20 mA, 4– 20 mA, or a digital signal.
Automatic motor adaptation, AMA
The AMA algorithm determines the electrical parameters for the connected motor at standstill and compensates for the resistance
based on the length of the motor cable.
Digital inputs
The digital inputs can be used for controlling various functions of the drive.
Digital outputs
The drive features 2 solid-state outputs that can supply a 24 V DC (maximum 40 mA) signal.
DSP
Digital signal processor.
Relay outputs
The drive provides 2 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 tempera-
ture and prevent overheating of the motor.
Initializing
If initializing is carried out (parameter 14-22 Operation Mode), the drive returns to the default setting.
Parameter 14-22 Operation Mode does not initialize communication parameters, fault log, or fire mode log.
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 opera-
tion can be either periodic duty or nonperiodic duty.
LCP
The local control panel makes up a complete interface for control and programming of the drive. The LCP is detachable. With the
installation kit option, the LCP can be installed up to 3 m (9.8 ft) from the drive in a front panel.
NLCP
The numerical local control panel interface for control and programming of the drive. The display is numerical and the panel is used
to show process values. The NLCP has storing and copy functions.
GLCP
194 | Danfoss A/S © 2022.05
Appendix
AU370727746889en-000101 / 130R0994