Technical Manual Cold Storage Controller EVP 3150-1 and EVP 3150-2
Page 3
Error Messages / Error Memory / Error Codes
If a failure occurs, the controller will show parameter
P43
with an error code with a flashing display au-
tomatically. Always the last
15
errot messages keep memorized with date and time of their appearance
and can be read-out via data interface.
----
..............no error
sel
............ error in assignment page, e.g. function selected too often
Thi
............ alarm sensor, overtemperature
tlo
............ alarm sensor, undertemperature
t
X
b
............ sensor X broken
t
X
c
............ sensor X hot-wired
dbt
............ number of defrost cycles without termination by temperature exceeded,
maybe too many ice or heater malfunction.
rrt
............ cooling has achieved maximum runtime. This message is only active at point-in-time
set by
P42
(mode page).
rdo
............ door contact is open too long. This message
is only active at point-in-time set
by
P42
(mode page).
dor
............ door X is open
opc
............ alarm at digital input X
cha
............ safety chain open
hrd
............ hardware failure
If a sensor is short or broken, a time delay of 5 seconds takes effect before an alarm will be activated.
Configuration Concept
The inputs/outputs of the EVP-cold storage controller
have no fixed tasks. The EVP works with a "
free
configurable
" concept, this means that all available
inputs and outputs (
relays, sensors, digital inputs,
analogue output
) can be configured to work with any
integrated control function or control circuit.
Sensors
Each sensor can fulfill each function, even up to 3
functions at the same time. (Function (a) of sensor
X, Function (b) of sensor X, Function (c) of sensor
X, X = sensor#).
e.g.
:
1. Control sensor /alarm sensor at the same time
2. Defrost limitation sensor and control sensor at
the same time, e.g. to control a refrigerated
shelf by the temperature of its air outlet.
Virtual Sensors
Up to 4 sensors can be combined to a 'virtual' sensor
to realize averaging with selectable emphasis.
Digital inputs (Optocoupler inputs)
Each digital input can be assigned to one of the
possible functions.
Relay Outputs
Each relay can be used to control one of the possible
functions. The same function can even be assigned
to multiple relays.
Relay output #4 is a Solid State Relay
with a lower contact rating than the
standard relay outputs. Normally, this
output is used for driving Electronic Ex-
pansion Valves, but can be used for any
other task if it works within the specified current
range.
Parameter
Parameters of functions which are not assigned will not
appear in the parameter pages to improve survey.
Assignment
The function of each input and output can be preset
on the 'assignment page'. The assignment can be
done by keys or via interface.
Configuration Example for an EEx-Valve
Configuration of the controller
Hereby we use the example from above: A cold storage with an evaporator with Electronic Expansion
Valve.
Action
Key
Display
Remarks
enter page lising ..........................."
P
" ....... (A) ...............hold key for > 2 seconds
select assignment page................"
" .... (h)
enter asssignment page ..............."
P
" ....... h01 ..............h01 is the 1st parameter on the page and
determines the function of relay 1
displaying the function of relay 1 .."
P
" ....... any
new assignment of relay 1 ..........."
P
" ....... C00 ............(Code expected) only if no key key is hit for
about 3 minutes
enter access code ........................"
" ....... C88
confirm .........................................."
P
" ....... any
select function ..............................."
" .... ALA .............ALA = alarm relay
confirm .........................................."
P
" ....... h01 ..............parameter # will be displayed again
select new in-/output ....................."
" ....... h02 ..............determines the function of relay 2
displaying the function of relay 2 .."
P
" ....... any
new assignment of relay 2 ..........."
P
" ....... any
select function ..............................."
" .... dF1 .............dF 1= defrost relay (evaporator 1)
confirm .........................................."
P
" ....... h02 ..............parameter # will be displayed again
Repeat this steps until all inputs and outputs are assigned to the desired functions.
Display of actual values and states
All actual values are shown on the "
Actual Values
Page
" (
(l)
).
Status of the controller unit
If the 4 status LED's on the front are blinking
simultaneously and the display shows "oFF", the
control functions are disabled by digital input or
data interface.
Display of temperatures
"
L01
" -"
L04
" (Actual Values Page) show the actual
temperature value of the sensors 1-4 in a range
within -100... +100°C. "
L05
" shows a temperature
value which is calculated from the pressure value
of the transducer and the selected refrigerant table,
"
L07
" shows the 'virtual' temperature value.
With "
P31
"-"
P34
" and "
P36
" (Mode Page) this
displays can be calibrated.
Expansion Valve Status Display
This shows the current, average aperture size
from 0...100 % and additionally the actual state
of the valve.
cut
= Restart of the evaporator after abnormal
operating conditions (cutoff)
pdo
= Pumpdown of the refrigerant
(cooling relay ON for 30 sec.)
Setpoints
The active day or night setpoints are indicated by
the left decimal point switched on.
Time information
The Actual Values Page contains all runtime- /
remaining time information, so the times up to the
start of a function can be read.
Status of inputs/outputs
Digital-(OK)-Inputs State of the relays
Analogue Output: Parameter
L50
, value in %
Temperature Sensors
These types of temperature sensors can be used:
-
TF 201
, PTC sensor (2000 ohms@25°C)
-
TF 501
, PT1000 sensor (1000 ohms@0°C)
- customer specific sensor
So1
(-40...+25°C)
- customer specific sensor
So2
(-50...+50°C)
The type of sensor can be set by '
P35
' (Mode
Page).
Please don't use the TF 201 sensor
if you work with Electronic
Expansion Valves.
'Permanent Parameter' - Function
After power-up of the controller, the display will
indicate the 'permanent parameter' after some
seconds (or in case of a failure it will display the
current failure). This can also be read if you don’t
touch a key for more than 3 minutes.
If you think that it is suggestive to show any sensor
value as permanent parameter, do the following:
Change permanent parameter
- Select the parameter you want to have as
'permanent parameter'
- Press "
" and "
" simultaneously.
The display shows "
888
" for a moment, after
that the selected parameter will be shown as
the 'permanent parameter'.
OK
2
1
230V
0V
1 2
3 4
Relay
On
OFF
1: con
2: ALA
3:........................
1: dF1
2: .......................
3:........................
1: out
2: .......................
3:........................
1: InL
2: .......................
3:........................
dEF
dnh
sensor 1
sensor 2
sensor 3
sensor 4
relay 1
relay 2
relay 3
SolidState
Relay 4
Analog
EVP
Assignment
In-/Outputs
ALA
dF1
FAn
EEP
dIS
DI 1
DI 2
