Emerson XJAL-020Z-CFV-012 Manual page 37

5.7 THE ON/OFF FUNCTION
With "onF = oFF", pushing the ON/OFF key, the instrument is switched off. The
"OFF" message is displayed. In this configuration, the regulation is disabled.
To switch the instrument on, push again the ON/OFF key.
WARNING: Loads connected to the normally closed contacts of the relays are always
supplied and under voltage, even if the instrument is in stand by mode.
6. PARAMETERS
rtc Real time clock menu: to set the time and date and defrost start time.
DISPLAY
CF Temperature measurement unit: °C=Celsius; °F=Fahrenheit. WARNING: When the
measurement unit is changed the SET point and the values of the parameters Hy, LS,
US, Ot, ALU and ALL have to be checked and modified if necessary).
rES Resolution (for °C): (in = 1°C; dE = 0.1 °C) allows decimal point display.
DEFROST
EdF Defrost mode:
rtc = Real Time Clock mode. Defrost time follows Ld1÷Ld6 parameters on workdays
and Sd1÷Sd6 on holidays.
in = interval mode. The defrost starts when the time "Idf" is expired.
IdF Interval between defrost cycles: (0÷120h) Determines the time interval between the
beginning of two defrost cycles.
MdF (Maximum) length for defrost: (0÷255min) When P2P = n, (not evaporator probe: timed
defrost) it sets the defrost duration, when P2P = y (defrost end based on temperature) it
sets the maximum length for defrost.
dFd Temperature displayed during defrost: (rt = real temperature; it = temperature at
defrost start; SEt = set point; dEF = "dEF" label)
dAd MAX display delay after defrost: (0÷255min). Sets the maximum time between the end
of defrost and the restarting of the real room temperature display.
Fdt Drip time: (0120 min) time interval between reaching defrost termination temperature
and the restoring of the control's normal operation. This time allows the evaporator to
eliminate water drops that might have formed due to defrost.
TO SET CURRENT TIME AND WEEKLY HOLIDAYS
Hur Current hour (0 ÷ 23 h)
Min Current minute (0 ÷ 59min)
dAY Current day (Sun ÷ SAt)
Hd1 First weekly holiday (Sun ÷ nu) Set the first day of the week which follows the holiday
times.
Hd2 Second weekly holiday (Sun ÷ nu) Set the second day of the week which follows the
holiday times.
N.B. Hd1,Hd2 can be set also as "nu" value (Not Used).
TO SET DEFROST TIMES
Ld1÷Ld6 Workday defrost start (0 ÷ 23h 50 min.) These parameters set the beginning of the
6 programmable defrost cycles during workdays. Ex. When Ld2 = 12.4 the second defrost
starts at 12.40 during workdays.
Sd1÷Sd6 Holiday defrost start (0 ÷ 23h 50 min.) These parameters set the beginning of the 6
programmable defrost cycles on holidays. Ex. When Sd2 = 3.4 the second defrost starts
at 3.40 on holidays.
N.B. :To disable a defrost cycle set it to "nu"(not used). Ex. If Ld6=nu ; the sixth
defrost cycle is disabled
OTHER
Adr Serial address (1÷244): Identifies the instrument address when connected to a ModBUS
compatible monitoring system.
onF on/off key enabling: nu = disabled; oFF = enabled; ES = not set it.
rEL Software release for internal use.
Ptb Parameter table code: readable only.
7. DIGITAL INPUT
The free voltage digital input is used to stop defrost.
8. TTL SERIAL LINE – FOR MONITORING SYSTEMS
The TTL serial line, available through the HOT KEY connector, allows by means of the external
TTL/RS485 converter, XJ485-CX, to connect the instrument to a monitoring system ModBUS-
RTU compatible such as the X-WEB500/3000/300.
9. INSTALLATION AND MOUNTING
Instrument XR30CX shall be mounted on vertical panel, in a
29x71 mm hole, and fixed using the special bracket supplied.
The temperature range allowed for correct operation is 060
°C. Avoid places subject to strong vibrations, corrosive gases,
excessive dirt or humidity. The same recommendations apply
to probes. Let air circulate by the cooling holes.
10. ELECTRICAL CONNECTIONS
The Control has push-on connectors to accept a factory wire harness.
11. HOW TO USE THE HOT KEY
11.1 HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
1. Program one controller with the front keypad.
1598030330 XR30CX MRS GB r2.0 23.05.2013.doc
When the controller is ON, insert the "Hot key" and push o key; the "uPL" message
2.
appears followed a by flashing "End"
3. Push "SET" key and the End will stop flashing.
4. Turn OFF the instrument remove the "Hot Key", then turn it ON again.
NOTE: the "Err" message is displayed for failed programming. In this case push again o key if
you want to restart the upload again or remove the "Hot key" to abort the operation.
11.2 HOW TO PROGRAM AN INSTRUMENT USING A HOT KEY
(DOWNLOAD)
1. Turn OFF the instrument.
2. Insert a programmed "Hot Key" into the 5 PIN receptacle and then turn the
Controller ON.
3. Automatically the parameter list of the "Hot Key" is downloaded into the Controller
memory, the "doL" message is blinking followed a by flashing "End".
4. After 10 seconds the instrument will restart working with the new parameters.
5. Remove the "Hot Key"..
NOTE the message "Err" is displayed for failed programming. In this case turn the unit off and
then on if you want to restart the download again or remove the "Hot key" to abort the operation.
11.3 OTHER MESSAGES
Pon Keyboard unlocked.
PoF Keyboard locked
noP In programming mode: none parameter is present in Pr1
On the display or in dP2, dP3, dP4: the selected probe is nor enabled
On Controller is working, compressor relay is closed
dEF Defrost is running
12. TECHNICAL DATA
Housing: self extinguishing ABS.
Case: XR30CX frontal 32x74 mm; depth 60mm;
Mounting: XR30CX panel mounting in a 71x29mm panel cut-out
Protection: IP20; Frontal protection: XR30CX IP65
Connections: Screw terminal block  2,5 mm
Power supply: according to the model: 12Vac/dc, ±10%; 24Vac/dc, ±10%; 230Vac 10%,
50/60Hz, 110Vac 10%, 50/60Hz
Power absorption: 3VA max
Display: 3 digits, red LED, 14,2 mm high; Inputs: Up to 4 NTC or PTC probes.
Digital input: free voltage contact
Relay outputs: compressor SPST 8(3) A, 250Vac; or 20(8)A 250Vac
defrost: SPDT 8(3) A, 250Vac
Data storing: on the non-volatile memory (EEPROM).
Kind of action: 1B; Pollution grade: 2;Software class: A.;
Rated impulsive voltage: 2500V; Overvoltage Category: II
Operating temperature: 0÷60 °C;Storage temperature: -30÷85 °C.
Relative humidity: 2085% (no condensing)
Resolution: 0,1 °C or 1°C or 1 °F (selectable);
Accuracy (ambient temp. 25°C): ±0,7 °C ±1 digit.
13. CONNECTIONS
13.1 XR30CX – 8A COMPRESSOR
XR30CX
2 wiring.
2/3