Maximum Frequency - Danfoss ERC 112D VSC User Manual

User Guide | ERC 112D VSC Refrigeration Controller
CoP Compressor settings
"CSL" Min speed
Minimum operating speed of variable speed compressor. The actual rpm is multiplied by 10 to the selected value,
Min. 50 rpm
hence read actual rpm=value*10.
Max. 500 rpm
Default 200 rpm
"CSH" Max speed
Maximum operating speed of variable speed compressor. The actual rpm is multiplied by 10 to the selected value,
Min. 50 rpm
hence read actual rpm=value*10.
Max. 500 rpm
Default 450 rpm
"CSS" Start speed
Start speed is the speed at compressor must start before changing to the requested speed to ensure the proper lubrication.
Min. 50 rpm
The actual rpm is multiplied by 10 to the selected value, hence read actual rpm=value*10.
Max. 500 rpm
Default 200 rpm
"HdS" Hot gas Defrost Speed
Required compressor speed during hot gas defrost. The actual rpm is multiplied by 10 to the selected value,
Min. 50 rpm
hence read actual rpm=value*10.
Max. 500 rpm
Default 200 rpm
"CtP" Cabinet Temperature Percentage
If compressor is controlled based on the weighted average temperature of cabinet air and evaporator sensors, this parameter
Min. 0 %
defines the percentage of cabinet air temperature to be considered for the calculation of weighted average temperature.
Max. 100 %
Default 100 % For example, CtP= 40% , SCo=5°C and EuA =3°C. Weighted average temperature = 0.4 x 5 + 0.6 x 3 = 3.8°C
"SSS" Step size
In order to achieve lower start and stop noise compressor is made to start at certain speed and then ramp up / ramp down to
Min. 0 rpm
the desired speed. This is the rate at which compressor must ramp up and ramp down from start and stop speed. Ramp up and
Max. 150 rpm
Default 25 rpm ramp down rate to ensure smooth start and stop of compressor and reduce compressor noise during start and stop. The actual
rpm is multiplied by 10 to the selected value, hence read actual rpm=value*10.
"CoF" Off frequency
This is required frequency from the controller to give stop signal to the compressor. Any frequency below this is considered as
Min. 10 Hz
stop frequency.
Max. 200 Hz
Default 50 Hz
"uFL" Minimum Frequency
Required input frequency from the controller corresponding to minimum speed of the compressor
Min. 10 Hz
(Compressor speed in rpm = Frequency in Hz * Multiplication factor)
Max. 200 Hz
Default 66 Hz
"uFH"

Maximum frequency

Required Input frequency from the controller corresponding to Maximum speed of the compressor
Min. 10 Hz
(Compressor speed in rpm = Frequency in Hz * Multiplication factor)
Max. 200 Hz
Default 150 Hz
"uLF" Multiplication factor
Multiplication factor used in the compressor to calculate the required speed based on the received frequency signal
Min. 1
(Compressor speed in rpm = Frequency in Hz * Multiplication factor)
Max. 100
Default 30
"PPF" Proportional Gain(Kp)
Propotional gain to be used in the PI controller Proportional gain value to be defined based on the required capacity adaptation
Min. 0
speed
Max. 100
Default 50
Integral Gain( Ki)
"PIF"
Integral gain to be used in the PI controller, Integral gain value to be defined based on the required capacity adaptation speed.
Min. 0
Max. 100
Default 3
"PcI" Integral Time constant(Ti)
Integral time constant to be used in the PI controller, Integral Time Constant value to be defined based on the required capacity
Min. 0
adaptation speed
Max. 999
Default 100
"EHd" Sensor Error handling Type
Method to handle the refrigeration system in case of cabinet sensor error.
Default no
"no": no sensor error handling.
"SEt": Run the refrigeration system based on error run/stop time.
14 | BC286552322855en-000201 © Danfoss | DCS (vt) | 2019.07