Emerson XM678D Manual page 5

HM Access to clock menu or reset of the RTC alarm;
Use
An Value of analog output;
SH Value of superheat. nA = not Available;
oPP Percentage of valve opening.
dP1 (Pb1) Value read by probe 1.
or
dP2 (Pb2) Value read by probe 2.
dP3 (Pb3) Value read by probe 3.
dp4 (Pb4) Value read by probe 4.
arrows to
dP5 (Pb5) Temperature read by probe 5 or value obtained from
select an
pressure transducer.
entry,
dP6 (Pb6) Value read by probe 6.
dPP Pressure value read by (Pb5) transducer.
then
rPP Virtual pressure probe, only on slave.
press
L°t Minimum room temperature;
H°t Maximum room temperature;
dPr Virtual probe for room temperature regulation [rPA and rPb];
dPd Virtual probe for defrost management [dPA];
to see the
dPF Virtual probe for fan management [FPA];
value or
to go on rSE Real thermoregulation set point: the value includes the sum of
SET, HES and/or the dynamic set point if the functions are
with other
value. enabled.
Exit
Pressed together or wait the timeout of about 60 sec
11. MENU FOR MULTIMASTER FUNCTION: SEC
The function "section" SEC is enabled when icon
remote programming mode, from a keyboard not physically connected to the board,
through the LAN functionality.
Button or
Action
display
Enter menu
Waiting for
SEC
action
Enter section
list
LOC
ALL
Select proper
Or
SE1
function
SEn
SE8
Confirm
Exit menu
(*) The devices on the LAN are indexed by using the Adr parameter (in ascending
order).
EXAMPLES:
1. To modify the same parameter values in all the devices connected to the LAN:
enter multimaster menu. Select and confirm ALL. Exit from multimaster menu.
Enter the programming menu and change the required parameter values.
The new values will be changed on all devices connected to the LAN.
2. To modify a parameter value in the device with [Adr = 35]: find the relevant
indexed section (the one linked to [Adr = 35]). Enter multimaster menu. Select
and confirm this section from the multimaster menu. Exit from multimaster menu.
Enter the programming menu and change the required parameter value.
3. If the alarm nod is present: enter the multimaster menu. Select and confirm the
LOC section. Exit from multimaster menu.
AT THE END OF THE PROGRAMMING PROCEDURE, SELECT THE
SECTION "LOC". IN THIS WAY THE ICON
11.1 SYNCHRONIZED DEFROST
The synchronized defrost allow to manage multiple defrost from different boards
connected through the LAN connection. In this way, the boards 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.
Press for 3 seconds, the rtC or other will be
BEGIN
showed. The measurement unit blinks.
1592023140 XM678D GB r2.8 01.09.2017.docx
is lit. It allows entering in the
Notes
Press UP arrow for about 3 sec, the
will be ON.
The menu to change the section will be
entered. SEC label will be displayed.
Press SET to confirm. The following list will
be available to select the proper network
function.
To gain access only to the local device.
To gain access to all the devices connected
to the LAN.
To gain access to the device with 1st Adr (*)
...
To gain access to the device with 8th Adr (*)
Select and confirm an entry by pressing SET
button.
Press SET and UP together or wait about 10
seconds.
WILL BE SWITCHED OFF!!
Find Adr
Modify
Adr
or
EXIT
The LSn and LAn parameter are only to show the actual settings (read only). Se the
following example of configuration:
DAILY DEFROST FROM RTC: [EdF = rtC]
IdF Parameter: for safety reason force the value of Idf at +1 respect to the interval
between two Ld parameters. The IdF timer is reinitialized after defrost and at every
power-on.
DEFROST START: at the time selected by the parameters Ld1 to Ld6 or Sd1 to Sd6.
DEFROST END: if the probes reach the dtE temperature or for maximum MdF time.
SAFETY and RtC or RtF ALARM: with clock alarm the device will use the parameter
IdF, dtE and MdF.
WARNING: don't set [EdF = rtC] and [CPb = n].
MULTIMASTER DEFROST: all the probes with clock
Table for example
Par. Unit A (RTC)
Adr
n
EdF rtC (clock)
IdF 9 hours safety
MdF 45 min safety
dtE
12°C safety
Ld1
06:00
Ld2 14:00
Ld3 22:00 3°
12. COMMISSIONING
icon
12.1 CLOCK SETTING AND RTC ALARM RESET
If the clock is present: [EdF = rtC] enable the defrost from rtc [Ld1 to Ld6].
BEGIN
HM identify the clock RTC submenu; press
Display
HUr = hour  press
Min = minutes  press
Display
...... don't use others parameters if present.
EXIT
Note: the rtC clock menu is present also on the second level of parameters.
Warning: if the board shows the rtF alarm, the device has to be changed.
12.2 ELECTRONIC VALVE SETTINGS
Some parameters have to be checked:
[1] Superheat temperature probe: Ntc, Ptc, Pt1000 with parameter P6C. The sensor
has to be fixed at the end of the evaporator.
[2] Pressure transducer: [4 to 20mA] or ratiometric P5C = 420 or 5Vr with parameter
P5C.
[3] Range of measurement: check the parameter of conversion PA4 and P20 that are
related to the transducer.
TRANSDUCER: [-0.5/7Bar] or [0.5/8Bar abs] the correct setup is relative pressure with
PA4 = -0.5 and P20 = 7.0. The [0.5/12Bar abs] the correct setup is relative pressure
with PA4 = -0.5 and P20 = 11.00.
Example of virtual pressure with unique [4 to 20mA] or [0 to 5V] transducer:
XM6x8D_1
Param.
without transducer
Adr n
LPP LPP = n
LAN or not connect
P5C
the probe
PA4
Not used
P20 Not used
[4] From EEV submenu: select the correct kind of gas with FTY parameter.
[5] Use the following parameters to setup the right valve driving, according to the valve
datasheet from the manufacturer.
XM678D
Press more than once the DOWN arrow to find the
Adr parameter, the press SET.
Set the value of Adr parameter, then press SET to
confirm the parameter.
Press the two keys together to exit from menu or
wait for about 10 seconds.
Unit B (RTC)
N + 1
rtC (clock)
9 hours safety
45 min safety
12°C safety
1° 06:00 1°
2° 14:00 2°
22:00 3°
UP arrow (press once) to access the fast access
menu
to confirm/modify
to confirm/modify
Press for about 10 sec. The operation resets the RTC
alarm.
XM6x8D_2 + with
transducer
n + 1
LPP = Y
P5C= 420 or 0-5V
-0.5 bar
7.0 bar
Unit C (RTC)
N + 2
rtC (clock)
9 hours safety
45 min safety
12°C safety
06:00 1°
14:00 2°
22:00 3°
XM6x8D_3+
without transducer
n + 2
LPP = n
LAN or not connect
the probe
Not used
Not used
5/
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