Danfoss EIM 336 Manual Download Page 13

© Danfoss A/S (AC-MCI / sw), 2014-11 

DKRCC.PS.RQ0.B7.02 /520H8832   

 13

Manual 

Superheat Controller EIM 336

Group

PNU

Parameter Symbolic name

Min.

Max.

Default Units

e2 W

*10

Description

MOP

3013

n11

MOP

0

200

13.7

bar 

(abs.)

ü

ü

ü

Maximum operation pressure. If Pe goes 

above this value, the controller will 

control on Pe, and not on superheat

3113

KpM

Kp MOP

0.5

10

0.5

ü

ü

ü

Kp proportional gain while in MOP 

control mode

3114

TnM

Tn Mop

30

600

180

ü

ü

Tn integration time while in MOP control 

mode

3121

DMO

Diff MOP

-20

0

0

bar 

(abs.)

ü

ü

Differential MOP. A remote offset that is 

added to the MOP. Needs to be written 

every 5 seconds, else the offset is set 

to 0. 

Defrost

50011

DeA

Def Activate

0

1

0

ü

Defrost activating

50008

DHO

Def Hold OD

0

100

30

%

ü

ü

Defrost holding level

50009

DH1

Def Hold Ti 1

0

32000

120

s

ü

ü

Defrost holding timer 1

50010

DH2

Def Hold Ti 2

0

32000

60

s

ü

ü

Defrost holding timer 2

64305

DDO

Def hold OD 

shdw

0

100

30

%

ü

ü

Copy of 50008. If it is required to write 

Def Hold OD frequently, this should be 

used instead.

T

e

 Control

3115

KpTe

Kp Te

0.5

10

1

ü

ü

Kp proportional gain while in Te control 

mode

3116

TnT

Tn Te

30

600

60

ü

ü

Tn integration time while in Te control 

mode

3117

TeR

Te Reference

-200

200

0

°C

ü

ü

Te reference while in Te control mode

External 

sensors

2643

PEV

ext. EvapPress 

P0

0

65535

0

milli 

bar

ü

External evaporator pressure. This value 

can be used instead of a sensor. This 

register must be written at least every 5 

seconds, otherwise the sensor value will 

be used.

2644

TS2

ext. S2 temp

-200

200

0

°C

ü

ü

External S2. This value can be used 

instead of a sensor. This register must 

be written at least every 5 seconds, 

otherwise the sensor value will be used.

2646

TS4

ext. S4 Air temp

-200

200

0

°C

ü

ü

External S4. This value can be used 

instead of a sensor. This register must 

be written at least every 5 seconds, 

otherwise the sensor value will be used.

LOC

50003

LTR

LOC Trig

0

100

95

%

ü

ü

Trigger value for loss of charge

50004

LRe

LOC Reset

0

100

85

%

ü

ü

Reset value for loss of charge

50005

LTm

LOC Timer

0

7200

3600

s

ü

ü

Timer to trigger LOC alarm

50007

LST

LOC SH Trig

0

50

20

K

ü

ü

ü

SH error trigger level for LOC alarm

Setup

Modbus

2008

003

Unit Addr

1

240

165

ü

ü

Primary unit address is used when 

jumper KM7 is mounted

2009

UA2

Unit Addr 2

1

240

164

ü

ü

Secondary unit address is used when the 

jumper KM7 is not mounted

50060

MBa

MB Baud

0

2

1

ü

ü

Communication setting baud rate, 0 

=9600 , 1 = 19200, 2 = 38400

50061

MPa

MB Parity

0

2

2

ü

ü

Communication setting parity, 

0 = no parity, 1 = odd parity, 2 = even

50062

MSB

MB StopB

1

2

1

ü

ü

Communication setting stop bit, 1 = 1 

stop bit, 2 = 2 stop bit

64200

-

Modbus trans

0

3

1

ü

ü

1 = Enabling translation tables. If 

the translation table is enabled, only 

registers some are accessible.

Valve

3032

n37

Max steps

100

1000

384

ü

ü

Maximum number of steps

(384 x 10 microsteps = 480 half steps)

3033

n38

Max steps/sec

5

300

31

ü

ü

Steps per second

3034

n39

Start backlash

1

100

10

%

ü

ü

Backlash (steps) to close in percent at 

startup (power on). 

3035

n40

Backlash

0

100

20

%

ü

ü

Backlash (steps) for spindle play 

compensation. This is active during 

normal control

3037

n42

Comp. dir.

1

2

1

ü

ü

Compensation direction

3051

n56

Motor current

0

300

150

mA

ü

ü

Motor current

Regulation

 (continued)

Summary of Contents for EIM 336

Page 1: ...ess noise The EIM 336 is the superheat controller that can be used to control the opening degree of a valve based on the superheat of the evaporator This is applicable in applications such as air cond...

Page 2: ...allation sensors 17 Warnings 17 Acronyms and abbreviations used in this manual LOC Loss of charge indication SH Superheat MOP Maximum operating pressure MSS Minimum stable superheat Te Saturated sucti...

Page 3: ...densed Superheat close When the superheat is below a set minimum value the valve will close faster in order to protect the compressor from the risk of getting liquid in the suction line Manual control...

Page 4: ...S2 PT1000 S4 PT1000 or digital input from external contact EEV driver Max current 150 mA EEV Uni or bipolar coil Data communication RS485 Modbus RTU Environment Storage 34 C to 71 C 30 F to 160 F Ope...

Page 5: ...odbus address stored in PNU no 40041 default 165 Jumper not mounted Outdoor unit condenser Modbus address stored in PNU no 40042 default 164 Com KM5 1 Drain D 2 RS485 TxD RxD 3 RS485 TxD RxD 4 Not Use...

Page 6: ...trol mode does not depend on the r12 Main Switch and will set the opening degree regardless of its setting Setting o18 Manual ctrl to 0 again the controller will assume normal control and will open or...

Page 7: ...secondary address is 164 Note Changes to these parameters will become active immediately This means that a modbus tool or controller that changes these settings will loose connection to the EIM 336 an...

Page 8: ...e controller is powered the valve will first be closed fully so that the controller starts from a known opening degree 0 In order to make sure that it is fully closed the valve will be closed 100 plus...

Page 9: ...sensor value will be used 5 Configuring the superheat control The superheat control algorithm will attempt to regulate the superheat down to the lowest stable value between the minimum superheat sett...

Page 10: ...um operation pressure If Pe goes above this value the controller will control on Pe and not on superheat Kp MOP 3113 Kp proportional gain while in MOP control mode Tn MOP 3114 Tn integration time whil...

Page 11: ...05 Timer to trigger LOC alarm LOC Alarm 50006 Loss of charge alarm flag 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...

Page 12: ...t regulation response Very low value give the risk of unstable regulation For Danfoss only 3105 SHL SH Low 3 20 6 K Superheat low setting for non linear control 3106 SHH SH High 8 40 16 K Superheat hi...

Page 13: ...ext S2 temp 200 200 0 C External S2 This value can be used instead of a sensor This register must be written at least every 5 seconds otherwise the sensor value will be used 2646 TS4 ext S4 Air temp 2...

Page 14: ...ain Switch 64309 Manual OD as steps 0 1 0 Enable the manual OD in o45 to be entered as halfsteps Readouts are still in percent Service Alarm 2046 RAL Reset alarm 0 1 0 1 clear alarm 20001 EKC Error 0...

Page 15: ...troller will go to either the low or high boundary de pending on the error The highest value will be shown if the signal is above the maximum value The lowest value will be shown if the signal is belo...

Page 16: ...it 3 Bit 2 Bit 1 Bit 0 Unused MOP Active Close Timer active Sensor Errors Control state Variables parameters CTRLstatus bit 0 3 Controlstate 0 closed 1 Error 2 Inject 3 De humidify 4 Force OD 5 Defros...

Page 17: ...ght after the evaporator If the measured value is 1 2 K lower than the actual value of Pe right after the evaporator it may cause the evaporator to flood This is the case when the pressure transmitter...

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