Carel EVD4, User Manual, Page: 38 / 48

38
ENGL
ISH
EVD
4
+030220227 - rel. 2.1 - 12.06.2008
Power request cooling capacity Reading of the cooling capacity, from pCO
Probes offset S1 A 1 0 0 0 correction of S1 Correction of the value measured by sensor S1
Probes offset S2 A 2 0 0 0 correction of S2 Correction of the value measured by sensor S2
Probes offset S3 A 3 0 0 0 correction of the lower limit of S3 Correction of the value measured by sensor S3
„
Refrigerant I 50 4 3 2 number indicating the type of refrige-
rant used “Type of refrigerant (consult the electronic expansion valve technical documentation
to check the complete valve-driver
system compatibility with the chosen refrigerant):
1 = R22
2 = R134a
3 = R404a
4 = R407c
5 = R410a
6 = R507a
7 = R290
8 = R600
9 = R600a
10 = R717
11 = R744
12 = R728
13 = R1270”
Regulation I 200 READ ONLY, received from µC
2
READ ONLY, received from µC
2
Regulation type I 17 0 0 0 type of control “Type of control, if EEV man. mode is not enabled:
0 = standard PID with protectors
1 = simple PID without protectors
2 = positioner on S4
In positioner mode, the activation of any control or alarm is disabled: the driver
positions the valve between 0 and the Maximum steps proportionally to a signal on
input S4 (see the instruction sheet), either 0-10 Volt or 4-20 mA”
Re-install AUTOSE-
TUP values confi rm enable restore default parame-
ter values Confi rms the reset of default parameter values, based on the information entered for
the System Set group of parameters from the pCO
Relay stdby D 58 0 0 0 relay status in standby, in stand-alone
mode Relay status in standby (unit powered but capacity demand equal to 0) when the
driver operates in stand-alone mode: normally the relay is open, if 1 the relay is closed
Requested steps I 62 0 0 0 required motor position in manual
control Required position of the motor in manual control
Reset to default D 1 0 0 0 restore the values of the parameters to
the default, tLAN version Restores the parameters to the internal default values if Enable reset to default or
KEY1 are equal to 14797, tLAN version
„
S1 probe limits Max I 42 9,3 9,3 9,3 end scale for pressure sensor on
input S1 Pressure value corresponding to the maximum of ratiometric output S1 (4.5 V).
„
S1 probe limits Min I 41 -1 -1 -1 ‘zero’ scale for pressure sensor on
input S1 Pressure value corresponding to the minimum of ratiometric output S1 (0.5 V).
S2-Pt1000 calib. I 68 0 0 0 calibration index for PT1000 sensor Calibration value engraved on the metallic body of the probe, minus 1000.0.
S4 probe type I 36 0 0 0 type of probe on channel S4 “Number that indicates the type of sensor connected to input S4:
0 = no measurement
5 = 4-20 mA
6 = 0-10 V”
S4 signal A 7 0 0 0 signal on input S4 Reading of the input signal on S4
SHeat dead zone A 32 0 0 0 dead zone for PID control Value that defi nes an interval around the SH set point: if the SH measured is within
this interval, the driver stops control and the valve will not perform any movements;
control resumes when the superheat value is outside of the dead zone.
„
Stand alone D 67 0 0 1 enable StandAlone Enables the StandAlone function from µC 2 or supervisor, the driver will operate in this
mode if digital input ID1 is enabled
Stand alone I 63 enable StandAlone Enables StandAlone from pCO, the driver will operate in this mode if digital input ID1
is enabled
Standby steps I 25 5 5 5 number of valve back steps Number of the steps for reopening the valve after complete closing, to release the
end spring
Steprate I 26 100 100 100 motor speed Speed of the stepper motor, in steps/s
Still current I 28 120 120 120 current with the motor off Current running through the motor when stationary
Suction temp. A 13 0 0 0 value measured by the suction tempe-
rature sensor Value measured by the suction temperature sensor
Superheat A 15 0 0 0 superheat value measured Value of the superheat calculated on the Mollier chart using the suction temperature
and evaporation pressure values
T diff cl A 48 3 3 3 temperature differential with modulating
thermostat in CH mode Differential temperature with modulating thermostat in CH, equal to the proportional
band
TX not fi ltered D 54 0 0 1 enable complete TX on TLAN/485 Set to 0, limits transmission on the main serial port only to the variables required for
the operation with the microchiller.
VAC D 19 0 0 0 alternating current power supply status Read-only, if 0 the power supply is present, if 1 it is not present.
†
Valve alarm D 70 1 1 1 enable/disable valve alarm Enables/disables the valve alarm (valve not closed at shutdown alarm), see EEV not
closed