Danfoss EIM 365 User manual

User Guide
Superheat controller
Type EIM 365 (PV01)
For commercial air conditioning and refrigeration applications

Contents
Introduction 3
Portfolio overview 4
Installation 5
Applications 10
User Interface 11
Conguration 12
Alarms 21
Parameter list 23
Ordering 28
Certicates, declarations, and approvals 29
Online support 30
Superheat controller, type EIM 365 (PV01)
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Introduction
EIM 365 is a superheat controller that can be used to control the superheat of the evaporator by adjusting the
opening degree of a valve. It is used in applications such as air conditioning, heat pumps and refrigeration. The
controller can also be used as stepper valve driver by setting the valve opening degree manually via communication
Bus.
Benets:
The evaporator is charged optimally for various load and suction pressure variations.Increase Energy Eciency by
ensuring optimum utilization of the Evaporator.It controls EEV in microsteps providing a smooth superheat curve
and less noise.
Features:
• Superheat regulation
• Maximum Operating Pressure function (MOP)
• Defrost
• Compressor protection functions
• Manual control via Modbus Communication
• Loss of Charge indication (LOC).
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Superheat controller, type EIM 365 (PV01)

Portfolio overview
Table 1: Portfolio overview
Features
Specications
Supply voltage
24 V AC / DC (+ 15%), 50 / 60 Hz, 15 VA / 8 W, Class II isolation
Power Consumption
Idle: Max. 20 mA @ 24 V DC
Operating: Max. 900 mA RMS @ 24 V DC
Backup battery
Yes (EKE 2U recommended)
Number of temperature sensors
2
Temperature sensor inputs
• S2: PT1000
• S4: PT1000 or Digital input from external contact
Number of Pressure sensor
1
Pressure Transmitter types
Ratiometric 0.5 – 4.5 V
Sensor Signal Sharing via ModBus
No
Valve Support
ETS 12.5, 25, 50, 100, 250, 400; ETS 6, CCMT 16-42; CTR; ETS Colibri 12-100C and User dened
Superheat Reference Mode
• MSS
• LoadAp
Startup mode
• Fixed OD
• P-Control
Operation
• Standalone
• Modbus RS485 (not terminated internally)
User interface
Modbus to supervisor, Modbus to PC
PC suite
Koolprog
Gateway to PC suite
ICPCON RS485 to usb convertor
Display
None
Table 2: Related products
Pressure transducer
Temperature sensor
Electric Expansion valve
M12 Angle Cables
AKS 32R
AKS 21, AKS 11
ETS 6, ETS 12.5-400, ETS Colibri
Various lengths of standard M12 cable
are available for connecting stepper
motor valves.
Superheat controller, type EIM 365 (PV01)
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Installation
Technical specication
Table 3: Technical specication
Features
Description
Supply voltage
24 V AC / DC (± 15%), 50 / 60 HZ Galvanically Isolated
Power consumption
Idle: Max. 20 mA @ 24 V DC
Operating: Max. 900 mA RMS @ 24 V DC
Input signals
Po
AKS 32R (or similar Ratiometric pressure transmitter)
S2
Measuring range: -60 – +120 °C / -76 – 248 °F
S4
PT1000 or Digital input from external contact.
EEV Driver
Max. current 900mA RMS
Supported valves:
ETS 12.5, 25, 50, 100, 250, 400; ETS 6, CCMT 16-42; CTR; ETS Colibri 12-100C and User dened
Data communication
Type
RS485 – Modbus RTU (Not terminated internally)
Baud rate
19200
Address settings
Selectable via Software (default 164)
Connector
Pluggable
Internal Termination
No
Galvanic isolation
No
Environmental conditions
Storage
-34 °C to 71 °C / -30 °F to 160 °F
Operating
-25 °C to 60 °C / -13 °F to 140 °F
Humidity
<95% RH, non-condensing
Dimensions
25 × 50 × 80 mm / 0.98 × 1.97 × 3.15 inch
Battery backup
18 – 28 V DC, > 49 VmAh (Recommend using Danfoss EKE 2U)
Operation
Standalone or via MODBUS data communication
Connector type
4 way Mini t receptacle Molex 39-01-2040 or similar
2 way Mini t receptacle Molex 39-01-2020 or similar
Crimp: 24- 18 AWG Molex 39-020-0039 or similar.
Gateway
Standard RS485 to USB convertor. (eg; ADAM-4561, ICP DAS I-7561U-G)
Note: check compatibility of gateway tool with PC operating system
Display
None
PC suite
None (EIM 365 is to be connected and congured using supervisor systems).
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Superheat controller, type EIM 365 (PV01)

PWR PO S4 S2 COM
ADR
+
-
GnD
+
D
EEV
1
3
2
V
M
B
P
T
C
E
Danfoss 80G8361
Black
Red
Yellow
Orange
ETS 6 valve
Green
Red
Black
White
Yellow
Orange
Black
Brown
B2
B1
A2
A1
ETS / KVS
Colibri®
CCMT / CTR valve
GND
TxD– TxD+
ETS 5M
V
P
M
B
T
C
E
Power Supply 24 V AC or DC
Pressure transmitter
Ratiometric 0.5 – 4.5 V i.e. AKS
32R
Modbus to master controller
Battery backup
Temperature sensors PT 1000
i.e. AKS 11
Regulation control On/O
switch (enable parameter HW
Main Switch to 1)
ETS 12.5, 25, 50, 100, 250, 400;
ETS 6, CCMT 16-42; CTR; ETS
Colibri 12-100C and user
dened
Dimension and Mounting
Figure 1: Connection diagram
IMPORTANT:
• The supply voltage is not galvanically separated from the input and output signals, hence it is not recommended
to use shared power supply.
• No voltage should be supplied externally, if S4 terminal is setup as a Regulation on/o switch.
• Do not reverse the polarity of the power connection cables or Modbus signal cable else it could damage the
terminals.
• EIM should be grounded and measures must be taken during installation to connect the board to a grounding
point.
Figure 2: Modbus one to one connection
Danfoss 80G166.10
PWR COM
M
RS485 (-) A
RS485 (+)
Superheat controller, type EIM 365 (PV01)
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M
A
B
R
N
G
Figure 3: Modbus in Daisy Chain
M
A B
RS485 (-)
RS485 (+)
RS485 (-)
RS485 (+)
Danfoss 80G165.10
PWR COM PWR COM
Master controller
EIM slave 1
EIM slave 2
120 Ohm min. 0.25 Watt termination
NOTE:
• Modbus transmission lines usually require termination resistors, especially for longer cable lengths.
• If two EIMs are connected remember to remove the addressing jumper on one of the EIMs. This will change the
address of EIM or else change the address of second unit using Modbus.
Mating connectors for EIM Controller Type Molex Mini-Fit Jr.™
80G159.10
11.6 mm
0.46 in
10.7 mm
0.42 in
8.5 mm
0.33 in
6.3 mm
0.25 in
80G160.10
80G161.10
10.6 mm
0.42 in
RECEPT CONTACT
24-18AWG Molex
39-00-0039 or similar
2 WAY MINI-FIT RECEPTACLE
Molex 39-01-2020 or similar
4 WAY MINI-FIT RECEPTACLE
Molex 39-01-2040 or similar
Connector kit for 5x EIM controller 080G1601
80G162.10
80G163.10
Connecting Modbus
• For the Modbus cable, it is best to use 24AWG shielded twisted-pair cable with a shunt capacitance of 16 pF/ft and
100Ω impedance.
• The max. permissible number of devices simultaneously connected to RS485 output is 32. The RS485 cable is of
impedance 120 Ω with maximum length of 1000 m.
• Terminal resistors 120 Ω for terminal devices are recommended for length > 1 m
Not in use
Ground
WARNING:
• Accidental damage, poor installation, or site conditions, can give rise to malfunctions of the control system, and
ultimately lead to a plant breakdown.
• Every possible safeguard is incorporated into our products to prevent this. However, a wrong installation, for
example could still present problems. Electronic controls are no substitute for normal, good engineering practice.
• Danfoss will not be responsible for any goods, or plant components, damaged because of the above defects. It is
the installer’s responsibility to check the installation thoroughly, and to t the necessary safety devices.
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Superheat controller, type EIM 365 (PV01)

1
2
3
Mounting temperature sensor
• Mount sensor on a clean surface without any paints.
• Remember to put on heat conducting paste and insulate the sensor.
• Sensor mounting max. 5 cm from the outlet of the evaporator to get the precise measurements.
Evaporator
Temperature sensor mounted close to the evaporator
Pressure sensor
Mounting pressure transmitter
Installation of the pressure transmitter is less critical but mounting of pressure transmitter should be closer to the
temperature sensor, right after the evaporator and with its head in upright position. Power supply
NOTE:
• Separate the sensor and digital input cables as much as possible (at least 3 cm) from the power cables to the loads
to avoid possible electromagnetic disturbance.
• Never lay power cables and probe cables in the same conduits (including those in the electrical panels).
Mounting EIM
• Grounding of secondary (output) of transformer is not recommended.
• Do not reverse the polarity of the power connection cables and avoid ground loops (i.e. avoid connecting one
eld device to several controllers as this may result in short circuits and can damage your device).
• Use individual transformers for EIM 365 controller to avoid possible interference or grounding problems in the
power supply.
• Use metal fasteners to place EIM board as this is important to reduce EMC and facilitate grounding.
Valve Stepper Motor Output
• All valves are driven with a 24 V supply chopped to control the current (Current driver).
• The stepper motor is connected to the “Stepper Valve” terminals (see terminal assignment) with Danfoss M12
connection cable.
• To congure stepper motor valves other than Danfoss stepper motor valves, the correct valve parameters must be
set as described in the Valve conguration section (see the conguration section for details).
• The correct valve must be dened in “Valve Type”, i.e., parameter 3002.
Superheat controller, type EIM 365 (PV01)
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Valve Cable Connection
Table 4: ETS Colibri / KVS Colibri/ ETS / KVS / CCM / CCMT / CTR
EIM terminals
A1
A2
B1
B2
Danfoss M12 Cable
White
Black
Red
Green
ETS Colibri® / KVS Colibri / CCMT / CTR / CCM Pin
number
3
4
1
2
ETS 6
Orange
Yellow
Red
Black
To be used with 4 pole terminal block.
Figure 4: ETS Colibri
NOTE:
For ETS 6 do not connect gray cable while using terminal block connection. If using JST 5pin its plug and play.
Guideline for long M12 cables on Danfoss stepper motor valves.
Long cables will lead to degradation of performance.
You can overcome this degradation by changing the settings for the valve driver.
This guideline is based on the cable type being the same type as the standard Danfoss stepper motor cable
Table 5: Recommended wire size and cable distance (twisted pair) between EIM controller and stepper motor valve
Cable length
1 m – 15 m
15 m – 30 m
Wire diameter for valve connection
0.52 / 0.33 mm2 20 / 22 AWG
Min. 0.52 mm2 20 AWG
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Superheat controller, type EIM 365 (PV01)

Applications
Superheat control
For superheat control, EIM implements a PI controller. The actual superheat is calculated based on temperature
sensor S2 and pressure sensor Pe values, and the controller will adjust the OD of the valve to bring the superheat to
the desired reference. If superheat is too low the ow in the expansion is decreased and superheat will be higher
and vice versa.
The EIM 365 controller is designed to be operated via Modbus and to rely on a constant connection to the master
controller of the system it is located within. In this conguration the master controller reads the readout registers
from the EIM 365 and uses the parameters to change the control behavior of the EIM 365 (see parameter list).
Figure 5: Superheat control
Evaporator temperature (Te) control for de-humidifying
For applications with a need to de-humidify the evaporator, it is possible to control on the saturated evaporator
temperature instead of the normal control signal.
Manual control (Stepper driver via Modbus)
In this application the EIM 365 is a stepper motor driver, where the valve can be controlled manually by setting the
desired opening degree via Modbus.
Superheat controller, type EIM 365 (PV01)
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User Interface
EIM 365 is to be setup using Modbus with connection to supervisor or using Danfoss Koolprog PC suite.
In order to connect the product to Koolprog, Customer has to use modbus convertor mentioned in techincal
specication.
Remember to check the PC operating system compatibility when using 3rd party convertors.
Figure 6: EIM 365
Danfoss 80G8127.10
12
34
1 1 1
3
112 2
222
344
GND
Power
Power supply
Modbus
connection to
ICPCON(RS485)
ICPCON to PC
Tx+
Tx-
MODbus
Battery
BAcku Pressure
sensor S2 S4
+_
EIM 365
Koolprog pc tool
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Superheat controller, type EIM 365 (PV01)

Conguration
This section represents a guide on how to congure the EIM 365 series controller for various application. Also, the
conguration for other features, like startup, defrost and protection are also explained. The parameters are given in
a form of a parameter table, where the most important parameters in a mode are shown and described.
The EIM 365 controller has a default conguration to be operated via Modbus and to rely on a constant connection
to the master controller of the system it is located within. In this conguration the master controller reads the
readout registers from the EIM 365 and uses the parameters to change the control behavior of the EIM 365 (see
Parameter list).
The following control modes are available:
• Superheat control
• Manual Control
• Defrost
• Te Control for dehumidifying
• Protection features
Superheat Control Mode
For superheat control, one temperature sensor S2, and one pressure sensor Pe are needed. The actual superheat is
calculated based on these two sensor readings, and the controller will adjust the OD of the valve to bring the
superheat to the desired reference. If superheat is too low the ow in the expansion is decreased and superheat will
be higher and vice versa
Table 6: Quick Guide for setting the controller in Superheat control mode
Features
Description
EnablingRegulation control ON/O switch (optional)
HwMainSwitch= 1 (default is 0, i.e S4 sensor)
Forstandalone conguration it is recommended to enable Regulation control
ON/O switch in order to control start/ stop regulation when needed, otherwise
the controller will start regulating when controller is powered up.
Select Refrigerant
O30= 1 - 42 (default value is 20 i.e R407C)
Select startup method
Startup mode:
1: xed OD, 2: P-control
Select superheat reference calculation method
n21 SH mode:
1: MSS; 2: LoadAp
Note: EIM can be set to Fixed SH mode by using LoadAp and setting Max SH =
Min SH
Select valve setting
n03=Valve type
Dene pressure sensor rangein bar absolute (x10)
o20 = Min. Transducerpressure
o21 =Max.Transducer pressure
Dene min/max superheat
N09= max. superheat
n10= min. superheat
Dene MOP (optional)
n11= maximum operating pressure (default is 12.5 bar absolute, max. 200 = MOP
o)
Set force opening of the valve (optional)
Start OD% (n17 )Start Up time (n15)
To start the superheat control
Set r12= ON
NOTE:
Make sure that r12 = 0 (OFF) for changing the settings.
Conguring the superheat control
The superheat controller is a PI controller, The time constant for the superheat control can be changed by setting
“Tn SH”.The alpha value is the design time constant and should be in reasonable proximity to the time constant of
theevaporator. A large alpha value means a slow reaction, a small alpha value means a fast reaction.If the superheat
drops below “n22 SH close”, the controller will close the valve faster to avoid the risk of liquid in the compressors
suction line.
In superheat mode the controller will control the superheat to be stable and closer to the superheat reference. The
Superheat reference is calculated based on following dierent methods:
Superheat controller, type EIM 365 (PV01)
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Table 7: Conguring the superheat control
Minimum Stable Superheat (MSS):
The controller will be searching for the minimum stable superheat between an
upper and lower boundary specied by the user. Then if the superheat is stable at
a certain value, the controller decreases the superheat reference, if the SH gets
unstable, the SH reference is raised again. The goal of this method is to search for
the lowest possible superheat that can be obtained while still maintaining a sta-
ble system.
EIM
365
Applicable
✔
Danfoss 84B1487.10
100 %
10 %
40 %
Superheat
Qo
Unstable region
(wet)
Stable
region (dry)
Min. SH Max. SH
Danfoss MSS
LoadAP:
In LoadAp application, SH reference follows a dened curve as shown in the dia-
gram. This two-point curve is dened by SH max and SH min. These two values
must be selected in such a way that the curve is situated between the MSS curve
and the curve for average temperature dierence ΔTm (temperature dierence
between media temperature and evaporating temperature). This makes the regu-
lation more stable compared to MSS because it does not seek a usability.
EIM
365
Applicable
✔
Danfoss
84B1489.10
100 %
Superheat
Qo
Unstable region
(wet)
Min. SH Max. SH
10 %
90 %
Stable
region(dry)
NOTE:
A xed superheat reference can be achieved by setting the “n10 Min SH” and “n09 Max SH” can both be set to the
desired reference value. This will disable the minimum stable superheat search algorithm and the controller will
instead regulate the superheat according to this reference.
Figure 7: Superheat reference tracking
Table 8: Superheat control conguration
Symbolic name
PNU
Description
n21 SH mode
3026
1: MSS; 2: LoadAp
n09Max. SH
3015
Maximum superheat reference setting.
n10Min. SH
3021
Minimum superheat reference setting.
n20Kp T0
3025
Pressure feedback gain.
n22SH close
3027
Superheat close level. If the superheat goes below
this value, the valve will close faster.
---Tn SH
3103
Integration time for superheat control
---Alpha
3111
Design time constant. A large alpha means a slow re-
sponse, a small alpha mean a fast response.
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Superheat controller, type EIM 365 (PV01)

Standalone conguration
The EIM 365 can be set in a standalone conguration by setting the modbus register i.e “HWMainSwitch” to 1. This
will setup the S4 input to be used as a Regulation On / O switch. Note that only external control of the EIM 365/336
in this conguration is through the Regulation On / O switch.
NOTE:
That the only external control of the EIM 365/336 in this conguration is through the Regulation control On / O
switch. It is not possible to manually control the opening degree or change settings, and the defrost and Te control
modes are not available.
Table 9: Related parameters
Symbolic name
PNU
Description
---HW Main Switch
64100
0= no external main switch
1 = regulation control On /O switch
Manual Control
In this mode The EIM 365 is acting as stepper motor valve driver, where valve opening degrees is sent using
Modbus. In this mode, no sensor is needed, and no superheat control is performed, and no safety features are
present.
Table 10: Manual control
EIM
365
Applicable
✓
When setting the manual control register “o18 Manual ctrl” to 1, the controller will be in manual control. During this
mode the opening degree is controlled by setting the “Manual OD%”.
NOTE:
• On using system conguration, it is necessary to read the "Ctrl Stats" register 3100 continuously, failure to do so
will start the MSS regulation automatically irrespective to the dierent status of the regulation On /O switch
• The manual control mode does not depend on the “r12 Main Switch” and will set the opening degree regardless of
its state.
• Setting “o18 Manual ctrl.” to 0 again, the controller will go to the default control, and will open or close from the
current opening degree
Table 11: Related parameters
Symbolic name
PNU
Description
o18 Manual ctrl.
2075
0 = Superheat control
1 = Manual control
o45Manual OD%
2064
Manual opening degree in %.
0 = fully closed.
100 = fully open.
Defrost Mode
EIM
365
Applicable
✓
Superheat controller, type EIM 365 (PV01)
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A defrost sequence is initiated by setting the defrost activate register “Def Activate” to 1. As long as this register is
kept at 1, the valve opening degree is 100%. When “Def Activate” returns to 0, the valve opening degree is kept at
“Def Hold OD” for “Def Hold Ti 1” seconds. When this time expires, the valve opening degree is set to a calculated
average opening degree for “Def Hold Ti 2” seconds. When this time expires the controller resumes normal
operation
NOTE:
That defrost is not initiated by the EIM 365, but must be initiated by the master controller. In a standalone
conguration the defrost mode is not possible. If a more dynamic control of the opening degree during defrost is
required, the user should disable the “Def Hold Ti 2” by setting it to 0, and only use the “Def Hold Ti 1”.
Figure 8: Defrost Mode
Avg.
OD
Def Hold
time 2
% opening
degree Auto
control
Fixed
Avg.OD%
Def Hold
OD%
Fixed 100
OD%
Table 12: Defrost table
Symbolic name
PNU
Description
Def Activate
50011
Defrost activating,
0 = No defrost
1 = Defrost active
Def Hold OD
50008
Opening degree during Def Hold Ti 1
Def HoldTi 1
50009
Defrost hold time 1
Def HoldTi 2
50010
Defrsot hold time 2
Te Control
EIM
365
Applicable
✓
For applications with a need to de-humidify the evaporator, it is possible to control on the saturated evaporator
temperature instead of the normal control signal.
If the “Te Reference” register is set to a value above 0, Te control is activated. Te and the 'Te Reference' to calculate a
new reference for the superheat control. The Te control consists of a separate PI control, which settings can be
changed by setting the gain, “Kp Te” and time constant, “Tn Te”. A large Kp will lead to a large change in the output
even at small changes in the evaporator temperature, but may lead to instability. A large Tn will lead to a slow
reacting system, while a small Tn will lead to a fast reacting system. The MOP function is still active during Te control
and it will assume control, if the evaporator is above the “MOP” limit.
Figure 9: Te Control
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Superheat controller, type EIM 365 (PV01)

Table 13: Te Control mode
Symbolic name
PNU
Description
Kp Te
3115
Kp proportional gain while in Te control mode
Tn Te
3116
Tn integration time while in Te control mode
Te Reference
3117
Te reference while in Te control mode
Protection or Limiter features
EIM 365 has protection features and Limiter features that prevents the system from operating under bad conditions
or gives indication towards it, these features are
• Superheat close
• MOP (Maximum operating pressure)
• LOC (Loss of Charge indication)
Superheat Close
EIM
365
Applicable
✓
SH close is a protection feature, When the SH values go below the SH close value, the controller will close the valve
faster.
Symbolic name
PNU
Description
n22 SH close
3027
Superheat close level. If the superheat goes below
this value, the valve will close faster.
Maximum operating pressure (MOP)
EIM
365
Applicable
✓
In order to reduce the current to the compressor it is possible to control the maximum operating pressure of the
evaporator. If the evaporator pressure exceeds the “MOP” limit, the valve opening degree is controlled by the MOP
function which will keep the pressure below the “MOP” limit. This function takes precedence over the superheat
control, so during MOP control the superheat is not controlled.
The MOP function can be disabled by setting the “MOP” to the maximum value (2000 equaling 200 bar absolute).
When the pressure reaches the set MOP point, an increase in OD is restricted. If the pressure reaches MOP + 0.5 Bar,
an increase in OD is prohibited, and instead the OD will start to decrease. If the pressure goes below the MOP point,
the controller will start to regulate the superheat normally.
The MOP controller consists of a separate PI control, which settings can be changed by setting “Kp MOP” and “Tn
MOP”. A large Kp will lead to a large change in opening degree even at small changes in the evaporator pressure but
may lead to instability. A large Tn will lead to a slow reacting system, while a small Tn will lead to a fast-reacting
system
Figure 10: MOP controlling
Danfoss 80G12.11
bar
Superheat controller, type EIM 365 (PV01)
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P1
P2
Pe
VOD
R
N
C
F
Figure 11: MOP controlling
At this pressure the OD increases slower and slower.
At this pressure the OD no longer increases. Beyond it the OD decreases.
pressure
Valve Opening Degree
Normal regulation
Normal OD
Controlled OD
Force closed OD
Table 14: Related parameters
Symbolic name
PNU
Description
n11 MOP
3013
Maximum operation pressure. If Pe goes above this
value, the controller will control on Pe, and not on su-
perheat.
--- Kp MOP
3113
Kp proportional gain while in MOP control mode.
--- Tn MOP
3114
Tn integration time while in MOP control mode.
LOC Indication
EIM
365
Applicable
✓
When a system loses refrigerant charge, the controller will have diculties keeping the superheat low, even when
increasing the valve opening degree. Therefore, if both the valve opening degree and the superheat are high for a
long period of time, this could indicate that refrigerant charge was lost.
When the valve opening degree exceeds the trigger level "LOC Trig, and the superheat exceeds the superheat
trigger level "LOC SH Trig", a timer is started.
When the timer exceeds the user dened time “LOC Timer” the “LOC Alarm” is set. If the valve opening degree drops
below the user dened reset level “LOC Reset”, the timer and the alarm are reset.
The loss of charge alarm does not perform any actions, except setting the “LOC Alarm”.
Table 15: Related parameters
Symbolic name
PNU
Description
--- LOC Trig
50003
Trigger value for loss of charge
--- LOC Reset
50004
Reset value for loss of charge
--- LOC Timer
50005
Timer to trigger LOC alarm
--- LOC Alarm
50006
Loss of charge alarm ag, 0 = no alarm, 1 = LOC alarm
--- LOC SH Trig
50007
SH error trigger level for LOC alarm
--- LOC Tmr
3102
Loss Of Charge time readout displays the elapsed
time since the alarm became active.
© Danfoss | Climate Solutions | 2022.09 BC415322248492en-000101 | 17
Superheat controller, type EIM 365 (PV01)

Sensor, Valve and Refrigerant Conguration
Pressure Sensor Settings
The pressure sensor input is setup by default to accept an AKS32R pressure transducer. If another sensor is to be
used, it is important to note that it needs to be a 0.5 - 4.5 Vd.c. radiometric type (10% - 90% of supply voltage). The
default range for the sensor is 0 to 16 bar absolute. This can be changed by setting the minimum transducer
pressure “o20 MinTransPres” and the maximum transducer pressure “o21 MaxTransPres” to the new values. The
values must be entered in bar absolute so a sensor with a range of -1 to 12 bar gauge, needs to be dened as 0 to 13
bar absolute.
Table 16: Pressure sensor parameters
Symbolic name
PNU
Description
o20 MinTransPres
2034
Minimumtransducer pressure (in bar absolute x 10).
Example: 0 bar absolute is entered as 0
o21 MaxTransPres
2033
Maximum transducer pressure(in bar absolute x 10).
Example: 13 bar absolute is entered as 130
NOTE:
BothDanfoss AKS 32R and Danfoss Saginomiya Pressure transmitter NSK-BExxx follows the relative (gauge) pressure,
therefore same rules apply as explained above in converting and dening it in bar absolute in EIM controller.
Temperature sensor Settings
The temperature sensor input is setup by default to accept PT1000 temperature sensor. The values for the sensor
can be adjusted to calibrate the sensor through the parameter “r09 Adjust S2”.
Table 17: Temperature sensor value oset
Symbolic name
PNU
Description
r09 Adjust S2
113
S2 Oset adjustment to correct the sensor signal due
to long wires etc.
Valve Conguration
The EIM 365 can be congured to be used with a wide range of valves ETS 12.5 or 25; ETS 50; ETS 100; ETS 250; ETS
400; USER DEFINE; Saginomiya; ETS 6; CCMT; CCMT16; CCMT24; CCMT30; CCMT42; CTR; CCMT 0; CCMT 1; ETS Colibri
valve
Table 18: Valve conguration parameters
Symbolic name
PNU
Description
EIM 365 common settings
n03 Valve type
3002
0: ETS 12.5, ETS 25, KVS 15
1: ETS 50, CCM 10, CCM 20, CCM30
2: ETS 100, CCM 40
3: ETS 250, KVS 42
4 : ETS 400
5: User dened
6: UKV, SKV, VKV, PKV
7: ETS 6
8: CCMT 2, CCMT 4, CCMT 8
9: CTM16
10: CCMT 24
11: CCMT 30
12: CMT 42
13: CTR
14: CCMT 0
15: CCMT 1
16: No valve selected
17: ETS 12C, 24C, 25C, 50C, 100C, KVS 2C, 3C, 5C
User dened valves:
Only The EIM 365 can be congured to be used with to use a valve from a dierent manufacturer, then these
parameters must be provided by the user.
EIM
365
Applicable
✓
Superheat controller, type EIM 365 (PV01)
© Danfoss | Climate Solutions | 2022.09 BC415322248492en-000101 | 18

Table 19: User dened valve
Symbolic name
PNU
Description
n03 Valve type
3002
User dened
n37 Max steps
3032
Maximum number of steps (384 x 10 micro steps = 480 half steps)
n38 Max steps/sec
3033
Steps per second
n39 Start backlash
3034
Backlash (steps) to close in percent at startup (power on).
n40 Backlash
3035
Backlash (steps) for spindle play compensation. This is active during normal control
n42 Comp. dir.
3037
Compensation direction
n56 Motor current
3051
Motor current
Decay Mode
64321
0: Fast decay; 1: Slow decay; 2: Mixed decay
External sensor values via Modbus
In some applications, the suction pressure and/or the refrigerant temperature on the evaporator outlet, is measured
by a system controller. This is often the case if the suction pressure is used to trigger low temperature/pressure
alarms by the systems main controller. In these cases the sensors can be omitted from the EIM 365, and the sensor
values can be received via modbus instead.
This requires that the systems main controller continuously transmits these values to the EIM 365.
If no new sensor value is received within 5 seconds of the last transmission, the sensor will revert to using the
physical sensors.
The suction gas temperature S2 and the evaporator pressure Pe can be set by writing to the registers “ext S2 Temp”
and “ext EvapPress P0” respectively.
NOTE:
The external evaporator pressure is received in millibar so 8.4 bar absolute must be sent as 8400.
It is possible to set the S4 temperature as an external sensor value also, but since this sensor is not used in the
superheat regulation, little practical use.
Table 20: External sensor values via Modbus
Symbolic name
PNU
Description
extEvapPress P0
2643
External evaporator pressure. This value can be used instead of a sensor.
This registermust be written at least every 5 second, otherwise the sensor value will
be used. The entered value is in millibar
ext S2temp
2644
ExternalS2. This value can be used instead of a sensor.
This register must be written at least every 5 second, otherwise the sensor value
will be used.
extS4 air temp.
2646
ExternalS4. This value can be used instead of a sensor. This register must be written
at least every 5 second, otherwise the sensor value will be used.
Selecting a refrigerant
The controller needs to know which refrigerant is used in order to accurately control the superheat. This can be
selected by setting the “o30 Refrigerant” to the desired refrigerant as dened in the list below.
If no refrigerant is selected (“o30 Refrigerant” is set to 0 meaning the refrigerant is undened), the “No Rfg. Sel.”
alarm is set and the controller will not start regulating.
Before refrigeration can be started , the refrigerant has to be dened. You can select the following refrigerant.
Table 21: Refrigerant settings
Symbolic name
PNU
Description
o30Refrigerant
2551
1= R12
10= R503
19= R404A
28= R744
37= R407F
2= R22
11= R114
20= R407C
29= R1270
38= R1234ze
3= R134a
12= R142b
21= R407A
30= R417A
39= R1234yf
4= R502
13= User dened
22= R407B
31= R422A
40= R448A
5= R717
14= R32
23= R410A
32= R413A
41= R449A
6= R13
15= R227
24= R170
33= R422D
42= R452A
7= R13b1
16= R401A
25= R290
34= R427A
© Danfoss | Climate Solutions | 2022.09 BC415322248492en-000101 | 19
Superheat controller, type EIM 365 (PV01)

WARNING:
Wrongselection of refrigerant may cause damage to the compressor.
Startup Modes
Forced opening During startup
In some applications it is necessary to open the valve quickly when the compressor turns on, to prevent too low
suction pressure. This is ensured by setting a xed opening degree and a startup time for the controller. Note that
this will give a xed opening degree for the duration of the start time, regardless of the superheat value. Thesetting
parameters are called Start OD% (n17) and StartUp time (n15).
EIM
365
Applicable
✓
Table 22: Forced opening During startup Parameters
Symbolic name
PNU
Description
Common EIM 336/ EIM 365
n15 Startup time
3017
Time for startup state (in seconds)
n17 Startup OD
3012
Opening degree during startup state
EIM 365
--- Startup mode
64322
1: Fixed OD; 2: P-Control
Select 1 for Fixed OD
P-control
The controller is programmed for auto proportional control that will quickly Change the opening degree based
onthe superheat of the system. The proportional control is active during the Minimum start time set by the user,
and until the Super heat crosses the reference.
EIM
365
Applicable
✓
Table 23: P-control Parameters
Symbolic name
PNU
Description
EIM 365
--- Startup mode
64322
1: Fixed OD; 2: P-Control
Select 2 for P-control
--- Min Startup Time
64324
minimum regulation time in seconds when use P-
control
n15 Startup time
3017
Time for startup state (in seconds)
Superheat controller, type EIM 365 (PV01)
© Danfoss | Climate Solutions | 2022.09 BC415322248492en-000101 | 20