Emerson XM678D Manual Download Page 15

 

 

1592023140 XM678D GB r2.8  01.09.2017.docx 

XM678D  

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LABEL 

VALUE 

DESCRIPTION 

RANGE 

NOTES 

 

LOF 

LAN ON/OFF Synchronization. 

n; Y 

This parameter states if the On/Off command of the section will act 
on all the other ones too:  

= the On/Off command acts only in the local section; 

= the On/Off command is sent to all the other sections. 

 

LLi 

LAN Light Synchronization. 

n; Y 

This parameter states if the light command of the section will act 
on all the other ones too:  

= the light command acts only in the local section; 

= the light command is sent to all the other sections. 

 

LAU 

AUX Synchronization. 

n; Y 

This parameter states if the AUX command of the section will act 
on all the other ones too:  

= the light command acts only in the local section; 

= the light command is sent to all the other sections. 

 

LES 

Energy Saving Synchronization. 

n; Y 

This parameter states if the energy saving command of the section 
will act on all the other ones too:  

= the Energy Saving command acts only in the local section; 

= the Energy Saving command is sent to all the other sections. 

 

LSd 

Remote probe displaying. 

n; Y 

This parameter states if the section has to display the local probe 
value or the value coming from another section:  

= the displayed value is the local probe one; 

=  the  displayed  value  is  the  one  coming  from  another  section 

(which has parameter 

LdS = Y

). 

 

LPP 

Pressure probe through the LAN. 

n; Y 

n = 

the value of pressure probe is read from local probe; 

Y = 

the value of pressure probe is sent via LAN. 

 

LCP 

Probe 4 through the LAN. 

n; Y 

 

 

StM 

Cooling request from LAN enable 
compressor relay. 

n; Y 

n = 

not used;

  

Y = 

a generic cooling requests from LAN activate the solenoid valve 

connected to compressor relay. 

 

ACE 

Cooling request from LAN enable even if 
compressor is stopped by door switch 

n; Y 

n = 

not used;

  

Y = 

a generic cooling requests from LAN activate the solenoid valve 

connected to compressor relay. 

 

 

 

PROBE CONFIGURATION

  

NTC (10KΩ a 25°C), PtC (806Ω a 0°C) 

 

 

 

P1C 

ntC 

P1 configuration. 

nP; PtC; ntC; CtC; PtM 

nP 

=

 

not present; 

PtC 

=

 

Ptc; 

ntC 

=

 

ntc; 

CtC 

=

 

ntc US 

PtM 

=

 

Pt1000. 

 

Ot 

P1 calibration. 

[-12.0°C to 12.0°C] 

Allows to adjust possible offset of the thermostat probe. 

 

P2C 

ntC 

P2 configuration. 

nP; PtC; ntC; CtC; PtM 

nP 

=

 

not present; 

PtC 

=

 

Ptc; 

ntC 

=

 

ntc; 

CtC 

=

 

ntc US 

PtM 

=

 

Pt1000. 

 

oE 

P2 calibration. 

[-12.0°C to 12.0°C] 

Allows to adjust possible offset of the evaporator probe. 

 

P3C 

nP 

P3 configuration. 

nP; PtC; ntC; CtC; PtM 

nP 

=

 

not present; 

PtC 

=

 

Ptc; 

ntC 

=

 

ntc; 

CtC 

=

 

ntc US 

PtM 

=

 

Pt1000. 

 

O3 

P3 calibration. 

[-12.0°C to 12.0°C] 

Allows to adjust possible offset of the probe 3. 

 

P4C 

nP 

P4 configuration. 

nP; PtC; ntC; CtC; PtM; LAN 

nP 

=

 

not present; 

PtC 

=

 

Ptc; 

ntC 

=

 

ntc; 

CtC 

=

 

ntc US 

PtM 

=

 

Pt1000; 

LAN 

= value received from master. 

 

O4 

P4 calibration. 

[-12.0°C to 12.0°C] 

Allows to adjust possible offset of the probe 4. 

 

P5C 

420 

P5 configuration. 

nP; PtC; ntC; CtC;  

PtM; 420; 5Vr; LAN 

nP 

=

 

not  present; 

PtC 

=

 

Ptc; 

ntC 

=

 

ntc; 

CtC 

=

 

ntc  US; 

PtM 

=

 

Pt1000; 

420 

=

 

4 to 20mA; 

5Vr 

=

 

0 to 5V ratiometric; 

LAN

 = value 

received from master. 

 

o5 

P5 calibration. 

[-12.0°C to 12.0°C] 

Allows to adjust possible offset of the probe 5. 

 

P6C 

PtM 

P6 configuration. 

nP; PtC; ntC; CtC; PtM 

nP 

=

 

not present; 

PtC 

=

 

Ptc; 

ntC 

=

 

ntc; 

CtC 

=

 

ntc US 

PtM 

=

 

Pt1000. 

 

o6 

P6 calibration. 

[-12.0°C to 12.0°C] 

Allows to adjust possible offset of the probe 6. 

 

 

 

SERVICE 

 

 

 

CLt 

- - - 

ON/OFF percentage (C.R.O.). 

(read only) 

It  shows  the  effective  cooling  time  calculated  by  XM600  during 
regulation (cooling time percentage). 

 

tMd 

- - - 

Time remaining before next defrost 
activation (only for interval defrost). 

(read only) 

It  shows  time  before  the  next  defrost  when  interval  defrost  is 
selected. 

 

LSn 

Auto 

Number of devices in LAN. 

1 to 8 (read only) 

Shows the number of sections available in the LAN. 

 

LAn 

Auto 

List of address of LAN devices. 

1 to 247 (read only) 

Identifies the instrument address (

1 to LSn

) inside local network of 

multiplexed cabinet controller. 

 

Adr 

ModBUS address. 

1 to 247 

Identifies  the  instrument  address  when  connected  to  a  ModBUS 
compatible monitoring system. 

 

rEL 

2.8 

Firmware release. 

(read only) 

Microprocessor firmware release. 

 

Ptb 

- - - 

Parameter table. 

(read only) 

It shows the original code of the Dixell parameter map. 

 

Pr2 

- - - 

Pr2 menu access. 

(read only) 

Access to the protected parameter list

.

 

 
 
 
 
 
 
 
 
 
 
 

 

Summary of Contents for XM678D

Page 1: ... that permits to be programmed in a simple way The optional direct serial output RS485 ModBUS compatible permits a simple XWEB interfacing RTC is available as options The HOT KEY connector can be used to connect X REP display Depending on the model 4 QUICK REFERENCE GUIDE HOW TO RUN THE SELF ADAPTIVE REGULATION IN 5 STEPS 1 After wiring the XM678D configure the type of valve bipolar or unipolar vi...

Page 2: ... wrong settings tEP Model LSt steps 10 uSt steps 10 CPP mA 10 CHd mA 10 Sr step s tEu bip unip HSF Half full 0 Manual settings Par Par Par Par Par Par Par 1 Danfoss ETS 25 50 7 262 10 10 300 bP FUL 2 Danfoss ETS 100 10 353 10 10 300 bP FUL tEP Model LSt steps 10 uSt steps 10 CPP mA 10 CHd mA 10 Sr step s tEu bip unip HSF Half full 3 Danfoss ETS 250 400 11 381 10 10 300 bP FUL 4 Sporlan SEI 5 to 11...

Page 3: ...the bounds of the pressure transducer or the P5C parameter is wrong Check all these options and eventually change the transducer rPF the remote pressure transducer is on error situation Check the status of the onboard GREEN LED if this LED is OFF the LAN is not working otherwise check the remote transducer LAST CHECKS ABOUT SUPERHEAT On the fast access menu dPP is the value read by the pressure ga...

Page 4: ...ow the air temperature set is sufficient to press and release the SET button the value is displayed for about 60 sec 9 HOW TO PROGRAM THE PARAMETERS PR1 AND PR2 The device provide 2 programming levels Pr1 with direct access and Pr2 protected with a password intended for experts ACCESS to Pr1 Press and hold for about 3 sec to have access to the first programming level Pr1 Select item or Select the ...

Page 5: ...can perform simultaneous defrosts with the possibility to end them in a synchronized way The Adr parameter cannot be duplicated because in this case the defrost cannot be correctly managed BEGIN Press for 3 seconds the rtC or other will be showed The measurement unit blinks Find Adr Press more than once the DOWN arrow to find the Adr parameter the press SET Modify Adr or Set the value of Adr param...

Page 6: ...h racks Sub 5 13 2 GENERAL CONSIDERATIONS The controller is able to regulate the superheat in manual or self adaptive mode according to the value of the parameter AMS autotuing enabling With AMS n the normal SH regulation is performed With AMS y the self adaptive SH regulation is performed 13 3 MANUAL OPERATING MODE AMS NO The temperature and SH regulation can be performed in 2 ways according to t...

Page 7: ... physical probe or virtual probe obtained by a weighted average between two probes following the formula value_for_room_regulation rPA rPE rPb 100 rPE 100 If the temperature increases and reaches set point plus differential the solenoid valve is opened and then it is closed when the temperature reaches the set point value again In case of fault in the thermostat probe the opening and closing time ...

Page 8: ...o that the relay will be ON for AMt minutes and OFF for 60 AMt minutes In case of P4 error or if P4 is absent the output is at AMA value for the AMt time then the output is at 0 value for the time 255 AMt time performing a simple PWM modulation 16 6 AUXILIARY OUTPUT The auxiliary output is switch ON and OFF by means of the corresponding digital input or by pressing and releasing the down arrow key...

Page 9: ...0 during workdays nU not used Format hours 10min resolution 10min Ld2 13 0 Workdays Second defrost start Ld1 to 23h50min 143 nU 144 Ld3 21 0 Workdays Third defrost start Ld2 to 23h50min 143 nU 144 Ld4 nU Workdays Fourth defrost start Ld3 to 23h50min 143 nU 144 Ld5 nU Workdays Fifth defrost start Ld4 to 23h50min 143 nU 144 Ld6 nU Workdays Sixth defrost start Ld5 to 23h50min 143 nU 144 Sd1 6 0 Holid...

Page 10: ...pening valve percentage during hot gas defrost During hot gs defrost there is not SH control MnF 100 Maximum percentage of opening admitted during normal functioning 0 to 100 During regulation it sets the maximum valve opening percentage This value is not used during the SFd phase soft start and during hot gas defrost where the fixed percentace of the valve opening is set by oPd Fot nU Manual open...

Page 11: ... closer of the valve and then will restart working REGULATION SET 5 0 Set point LS US Target set point for temperature regulation HY 2 Differential 0 1 C to 25 5 C 1 F to 45 F If CrE n then HY is the hysteresis for ON OFF thermoregulation If CrE Y or CrE EUP then HY is the proportional band for temperature PI controller On these cases the value should be greater than 5 C int 150 Integral time for ...

Page 12: ...evaporator probe is present idF 6 Defrost interval 0 to 120hours It sets the time interval between the beginning of two defrost cycles EdF in it is the interval between 2 defrost EdF rtC it is the safety interval in case of clock alarm RtC RtF idF 0 the defrost can be activated only manually or through RS485 or from external contact or from LAN MdF 45 Maximum duration for defrost 0 to 255min When ...

Page 13: ... reached and the ALd delay time is expired the LA alarm will be enabled AHY 1 0 Differential for room temperature alarm 0 1 C to 25 5 C 1 F to 45 F Threshold recovery after a temperature alarm ALd 15 Room Temperature alarm delay 0 to 255min Time interval between the detection of an alarm condition and the corresponding alarm signaling dLU 150 High temperature alarm detected by defrost probe dLL 15...

Page 14: ...P CL Digital input 3 polarity OP CL CL means the digital input is activated by closing the contact OP means the digital input is activated by opening the contact i3F ES Digital input 3 configuration EAL bAL PAL dor dEF AUS LiG OnF Htr FHU ES HdY EAL external alarm bAL serious external alarm PAL pressure switch activation dor door open dEF defrost activation AUS auxiliary activation LiG light activ...

Page 15: ...C ntC P1 configuration nP PtC ntC CtC PtM nP not present PtC Ptc ntC ntc CtC ntc US PtM Pt1000 Ot 0 P1 calibration 12 0 C to 12 0 C Allows to adjust possible offset of the thermostat probe P2C ntC P2 configuration nP PtC ntC CtC PtM nP not present PtC Ptc ntC ntc CtC ntc US PtM Pt1000 oE 0 P2 calibration 12 0 C to 12 0 C Allows to adjust possible offset of the evaporator probe P3C nP P3 configurat...

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