Carel Clima User Manual download pdf (Page 38)

38 “MPXPRO” +030220186 - rel. 1.0 - 22.05.2007

E N G L I S H

6.1.6 Probe and saturated evaporation temperature calibration

MPXPRO can adjust the values read by the probes and some of the internal variables. In particular, /c1 to

/c7 are used to increase or decrease the values read by the physical probes if conﬁgured as temperature

probes. Parameter Po5, on the other hand, corrects the value of the saturated evaporation temperature

calculated directly based on the evaporation pressure. The serial probes cannot be calibrated, while the

probes shared with the master are calibrated by the master.

/c1…/c7 Calibration of probes S1 to S7 (cannot be uploaded)

Code UOM. Min Max Def.

/c1…/c7

°C/°F or barg -20.0 20.0 0.0

These correct the reading made by probes S1 to S7 respectively (see the table to the side), so that MPX-

PRO considers the value read increased or decreased by the set value as the effective value. considers the value read increased or decreased by the set value as the effective value.

The table to the side shows the association between parameter-calibrated probe (the virtual sensors S8

to S11 do not require calibration). Calibration is performed before checking if the value if out-of-range,

that is, MPXPRO ﬁrst determines the values read by the probes, correcting them based on the calibration ﬁrst determines the values read by the probes, correcting them based on the calibration

parameters, then checks if these are outside of the range speciﬁed and where necessary generates a

probe error.

Example: To decrease the temperature measured by sensor S1 by 3 °C, set /c1 = -3.

Po5 Saturated evaporation temperature calibration

Code UOM Min Max Def.

Po5

°C/°F -20.0 20.0 0.0

To calibrate the value of the saturated evaporation temperature, enter the offset value for this parameter.

The action of this parameter is similar to the ones described above.

6.1.7 LAN and Hardware

Below are the parameters corresponding to the advanced conﬁguration of the local communication

network (LAN), the hardware features and navigation.

/5 Select °C or °F

Code UOM Min Max Def.

ﬂag 0 1 0

Deﬁnes the unit of measure used for control and display

/5 = 0: degrees centigrade (°C)

/5 = 1: degrees Fahrenheit (°F)

/6 Disable decimal point

Code UOM Min Max Def.

ﬂag 0 1 0

This is used to enable or disable the temperature display with resolution to the tenth of a degree between

–20.0 and +20.0. Outside of this range the resolution is always unvaried (°C/°F)

/6 = 0: data displayed with resolution to the tenth of a degree

/6 = 1: data displayed without resolution to the tenth of a degree

/t Enable display alarms and messages on secondary terminal

Code UOM Min Max Def.

ﬂag 0 1 0

This is used to enable or disable the display of the alarm codes on the secondary display)

/t = 0: alarms not displayed

/t = 1: alarms and messages displayed

/t2 Select display on secondary terminal

Code UOM Min Max Def.

/t2

ﬂag 0 14 0

This is used to select the probe displayed on the secondary terminal (display)

/t2 Associated probe

0 Absent (*) (default)

1 S1

2 S2

3 S3

4 S4

5 S5

6 S6

7 S7

8 S8 - serial

9 S9 - serial

10 S10 - serial

11 S11 - serial

12 Control probe (Sreg)

13 Virtual probe (Sv)

14 Set point

(*) No probe is displayed / Display not installed

d6 Select display on terminal during the defrost

Code UOM Min Max Def.

- 0 2 1

•

/C1 to /C7

Parameter Probe

/C1 S1

/C2 S2

/C3 S3

/C4 S4

/C5 S5

/C6 S6

/C7 S7

/C1 to /C7

Parameter Probe

/C1 S1

/C2 S2

/C3 S3

/C4 S4

/C5 S5

/C6 S6

/C7 S7

Important:

The calibration parameters are only active for probes set for

temperature measurements.

If the probe is not suitably conﬁgured, the calibration

parameters show the message “___”;

If there is a probe error, the display shows the speciﬁc error

message for the probe.

•

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