dIXEL
Operating instructions
1592001620
1592001620 XC450D GB R1.0 10.07.2009
XC450D
2/3
KEYBOARD
SET
to see or modify the pressure set point (ON only during regulation mode) and for
parameters.
n
(GIÙ) by holding it pressed for 3s, the regulation is enabled or disabled; it decreases
the displayed values.
o
(SU) to enter the alarm menu; it increases the displayed values.
e
CLOCK to enter the maintenance menu.
KEY COMBINATIONS
o
+
n
To lock and unlock the keyboard.
SET +
n
To enter the programming mode.
SET +
o
To exit the programming mode or the alarm menu.
FUNCTIONING DURING OFF STATUS
W hen the display is OFF, the controller checks only the LL liquid level alarm, the P1
pressure transducer status if absent, broken or when the pressure is out of scale.
REGULATION
HOW TO SET THE PRESSURE SET
Instrument in regulation mode (Regulation ON: push for 3sec
the DOW N key)
1)
Push and release the
SET
key
.
2)
The Lower display will show the
“SEtC”
label, the
Upper display will show the pressure value
.
3)
To change the Set value push the
o
or
n
.
4)
To memorise the new value push and release the
SET
key
within 30s.
(
Regulation stop
: push for 3sec the DOW N key)
HOW TO LOCK AND UNLOCK THE KEYBOARD
1.
Keep pressed for more than 3 s the [
o
and
n
] keys. The
“POF” message will be displayed and the keyboard will be
locked.
2.
At this point it will be possible only to see the set point, enter
the alarm menu, see the alarm and hours menu.
3. Keep pressed together for more than 3s the [
o
and
n
] keys
to unlock the keyboard, till the
“Pon”
message will be
displayed.
MESSAGES AND ALARMS
Code
Description
Cause
Action
Reset
OFF
Controller in
stand by
“By pass” digital input
de-activated
P1
P1 probe
failure alarm
Probe failure or out of
range
The compressor outputs
are activated according
to CPP, SPr o PoPr
parameters
Automatically as soon as the
probe restarts working.
EA1
EA2
EA3
Input safeties
alarm
The
corresponding
digital input is turned
on.
The corresponding output
is turned off.
Automatically as soon as the
digital input is turned off.
LA
Minimum
suction alarm
Pressure lower than
[SetC – LAL] value
after the tAo delay
Signalling only
Automatically: as soon as the
pressure or temperature reaches
the SetC-LAL+ differential value
(0.3bar o 1°C)
HA
Maximum
suction alarm
Pressure higher than
[SETC+HAL]
value
after the tAo delay
Signalling only
Automatically: as soon as the
pressure or temperature reaches
the (SetC+HAL - differential) value
(0.3bar o 1°C)
Pon
Keyboard
unlocked
Press together for 3”
the UP+DOWN keys
Press together for 3” the
UP+DOWN keys
The POF message will be
displayed and the keyboard will be
locked
PoF
Keyboard
locked
Press together for 3”
the UP+DOWN keys
Press together for 3” the
UP+DOWN keys
The “POn” message will be
displayed and the keyboard will be
unlocked
A12
Wrong
configuration
Wrong programmation
of some resources
Parameters check
Automatic
PARAMETERS PROGRAMMING
TO ENTER THE Pr1 PARAMETER LIST
: Hold pressed the
[SET +
n
]
key for 3 s.
TO ENTER THE Pr2 PARAMETER LIST:
Select with the [
n
] key the
Pr2
parameter and press the
SET
key.
1)
The flashing value “0 --” is displayed on the upper display.
2)
Insert the password
321
using the
o
and
n
key and
press SET.
To exit
: Press
SET + UP
or wait 30s without pressing a key.
NOTE
: the set value is stored even when the procedure is
exited by waiting the time-out to expire.
HOW TO CHANGE PARAMETER VALUES
1. Enter the Programming mode.
2. Select the required parameter with
o
or
n
.
3. Press the “
SET
” key the value start blinking.
4. Use
o
or
n
to change its value.
5. Press “
SET
” to store the new value and move to the following parameter.
HOW TO USE THE HOT KEY
HOW TO PROGRAM A HOT KEY FROM THE INSTRUMENT (UPLOAD)
1.
Program one controller with the front keypad.
2.
W hen the controller is ON, insert the “
Hot key
” and push
o
key; the
"uPL"
message 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.
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.
The unit can UPLOAD or DOW NLOAD the parameter list from its own E2 internal memory
to the
“Hot Key”
and vice-versa.
LIST OF PARAMETERS
PLANT DIMENSIONING AND TYPE OF REGULATION
oA4, oA5, oA6 Configuration of 3 relays:
Each relay according to the configuration of the oA4, oA5 and oA6 parameter can work
as:
1
cPr
Compressor
2
StP
Compressor valve
3
FAn
Fan
Not used
4
ALr
Alarm
5
nu
Not used
Not used
6
Lin
Not used
Not used
7
Ali
Only liquid alarm
Not used
8
Man
Manual regulation
Not used
PLANT CONFIGURATION EXAMPLE:
Plant with 3 compressors:
[oA1 = Liq,] fixed
[oA2 = Man] fixed
[oA3 = nu] fixed
oA4 = Cpr,
oA5 = Cpr,
oA6 = Cpr.
rty
:
Type of regulation: db
= neutral zone,
Pb
= proportional band.
Sty
:
Activation type of sequence for compressors: YES
= rotation: this algorithm
distributes the working time between the various loads to ensure even run times.
no
=
fixed sequence: the compressors are enabled and disabled in fixed sequence: first,
second etc.
PRESSURE TRANSDUCER
PA04
Pressure value corresponding to 4 mA
(0 ÷ PA20 bar). Minimum transducer
pressure value (absolute value).
PA20
Pressure value corresponding to 20 mA for probe 1
(PA04÷51.0 bar).
Maximum pressure value (absolute value).
CAL
Suction pressure calibration
(-12.0÷12.0 bar).
!PAY ATTENTION TO THE TRANSDUCER SETTING!
The instrument automatically converts the pressure into relative pressure
.
For PP07 pressure transducers (-0,5÷7.0bar or 0.5..8.0bar) is set [PA04=0.50 and
PA20=8.00] and for PP11 pressure transducers (-0,5÷11.0bar or 0.5..12.0bar) is
[PA04=0.50 e PA20=12.00], with 0÷30bar pressure transducer is [ PA04=1 e PA20=31].
DIGITAL INPUT CONFIGURATION
i1C
Liquid alarm polarity
:
oP
: the digital input is activated by opening the contact;
CL
: the digital input is activated by closing the contact.
