Parameter List - Danfoss EIM 336 Manual

Manual

Parameter list

Row text Explanation
The Parameter Number in the EIM 336 controller.
All parameters are addressed as holding register.
PNU The Modbus PDU address corresponds to PNU-1.
If no translation table is used, this is the register
number in modbus.
Min. Minimum value
Def. Factory default value
Max. Maximum value
e2 Is the value stored in EEPROM
W Is writing to the register possible
The scaling of the parameter. All values are read/
written as integers over modbus. Parameters
*10 need to be scaled, these are marked with a
checkmark. This means that 0.1 is sent as 1 over
modbus, 1.0 is sent as 10 etc.
Symbolic name The name of the parameter
Description Short parameter description
Group PNU Parameter
Control
Regulation
117 r12
Control
2075 o18
2064 o45
3017 n15
3012 n17
64308 OOD
Regulation
3015 n09
Super Heat
3021 n10
Control
3025 n20
3027 n22
3103 TSH
3105 SHL
3106 SHH
3107 GaH
3108 GaL
3109 TaH
3110 TaL
3111 Aph
3120 CoS
x
64301 n09
64302 n10 x
x
64303 TSH
64304 Aph x
12
Superheat Controller EIM 336
Symbolic name Min. Max.
Main switch 0 1
Manl control 0 1
100 /
Manual OD 0
480
Startup time 0 1000
Startup OD 0 100
OD while OFF 0 100
Max. superheat 2 20
Min. superheat 1 20
KpT0 -1 20
SH close 0 16
Tn SH 10 1800
SH Low 3 20
SH High 8 40
Gain High 0.5 10
Gain Low 0.1 50
Tau High 10 600
Tau Low 10 600
Alpha 15 600
Comp Speed 0 100
Max. superheat
2 20
shdw
Min. superheat
1 20
shdw
Tn SH shdw 10 1800
Alpha shdw 15 600
DKRCC.PS.RQ0.B7.02 /520H8832
Note:
Some parameters have what is called a "config lock". This means
that they can only be changed when the main switch of the EIM 336
is set to OFF (r12 = 0). This applies for instance to the type of
refrigerant (o30). So if you want to change the refrigerant, the
main switch (r12) must first be set to 0, then the refrigerant type
(o30) can be changed.
The following parameters require the main switch (r12) to be OFF:
n37 Max steps
n38 Max steps/sec
o03 Unit address
o30 Refrigerant
Please refer to the list below.
It should be possible to change all other parameters while the unit
is running (regulation parameters etc.).
Shdw ( ): Shdw values are stored in the volatile memory and will
x
revert back to the previously stored value in its main parameter if the
power failure occurs. Altering the main parameter will automatically
change the shdw value. If frequent change in parameter required, it
is recommended to use shdw parameter.
Default Units e2 W *10
0 ü
0
ü
% /
0
ü
step
0 s
ü ü
0 %
ü ü
0 %
ü ü
16 K
ü ü ü
4 K
ü ü ü
-1
ü ü ü
0.5 K ü ü ü
600
ü ü
6 K
ü ü ü
16 K
ü ü ü
1
ü ü ü
12.5 ü ü ü
45
ü ü
110
ü ü
130
ü ü
0 %
ü ü
16 K
ü ü
4 K
ü ü
600
ü
130
ü
Description
Start/stop of regulation. With this setting the
regulation can be started and stopped. This can
also be accomplished with the external hardware
main switch. See also appendix 1
0 = Superheat control, 1= Manual control
Manual opening degree for manual control .
Used when the o18 Manual Control is set to 1.
0%/0 step = fully closed,
100%/480 step = fully open.
% is chosen by default.
See PNU 64309 for changing to step.
Time for startup state (in seconds)
Opening degree during startup state
Opening degree during Off state
Maximum superheat reference setting
Minimum superheat reference setting
Pressure feedback gain
Automatic = -1, OFF = 0 , Fixed = 1 and above
Superheat close level. If the superheat goes below
this value, the valve will close faster
Tn integration time for the superheat control.
Lower value give fast regulation response.
Very low value give the risk of unstable regulation.
Superheat low setting for non-linear control
Superheat high setting for non-linear control
Expected gain at SH high for non-linear control
Expected gain at SH low for non-linear control
Expected tau at SH high for non-linear control
Expected tau at SH low for non-linear control
Design time constant.
A large alpha means a slow response, a small
alpha mean a fast response.
Compressor speed
Tn=2x Tn if compressor speed is set to 0%
Tn= Tn if the compressor speed is set between 25 -
100% - ref. parameter 3103
Copy of 3015. If it is required to write Max
superheat frequently, this should be used instead
Copy of 3021. If it is required to write Min
superheat frequently, this should be used instead
Copy of 3103. If it is required to write TnSH
frequently, this should be used instead.
Copy of 3111. If it is required to write alpha
frequently, this should be used instead.
© Danfoss A/S (AC-MCI / sw), 2014-11