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Instructions
if the set-point is given by the analogue input.
12) Press "Quick Menu" button, go to "Quick Se-
tup", go to parameter 0-22 and select "Feedback
[unit]" ref:[1652]. The pressure [bar] is going to be
shown in the upper right corner of the display.
This is how the screen will
look like, after configu-
ring the drive for Closed
loop application.
13) Ready to Run: Press "Hand on" and set refe-
rence in bars using the arrows on the display.
Before leaving the site never forget the next step.
14) Ready to Run: Press "Auto on".
Controls using a 4-20mA process signal &
CD302-PID controller
Change switch 54 from U to I
Follow the previous description.
-1/+12
bar
4-20 mA
Controls using a 4-20mA process signal &
CD302-PID controller + Smart Logic Control
Smart Logic control is preset for:
- Pump-down function
- Anti-short cycling management
- Minimum compressor running time control
Previous Process settings remain the same.
-1/+12
bar
4-20 mA
15) Prepare SLC functions: Press "Off".
16) Press "Quick Menu" button and go to "PID
Closed Loop" menu. Now change parameters to:
13-00: Select: "On"
13-12[0]: Cut-in pressure factory set to 1.0 bar;
change to your needed value
13-12[1]: Cut-out pressure factory set to 3.0 bar;
change to your needed value
13-20[0]: Minimum duration between two starts;
factory set to 5 min. (recommended value)
13-12[1]: Minimum compressor running time;
factory set to 0 second. Parameter to be adjusted
with special care to guarantee a proper oil reco-
very from the system but the adjustment must
avoid the compressor to run under vacuum. 15
to 30 seconds is the recommended adjustment
but remaining totally dependent of the system
inertia.
17) Ready to Run: Press "Auto on".
Note: the same logic can be used for a thermos-
tat function using a thermal sensor instead of a
pressure sensor.
© Danfoss | DCS (CC) | 2019.04
SMART LOGIC CONTROL: ANTI-SHORT CYCLING & PRESSOSTAT FUNCTION
Set point is adjustable on the LCP when
Par. 3-13 is set to Local.
P [bar]
Preferably, the last parameter to be set.
(Min. ON time = 0 min)
Start
Compressor running
Stop
* These parameters will only be available if
Par. 13-20 [0] *
Par. 13-00 is set to ON.
(Recycling time = 5 min)
Press [Auto On] to run the CD 302
[Main Menu] is used to access and program all
parameters.
It is possible to switch directly between Main
Menu mode and Quick Menu mode.
Parameter shortcut access can be carried out by
pressing down the [Main Menu] key for 3 seconds.
The parameter shortcut allows direct access to
any parameter.
[Alarm Log] displays an Alarm list of the five latest
alarms (numbered A1-A5). To obtain additional
details about an alarm, use the arrow keys to ma-
noeuvre to the alarm number and press [OK]. You
will now receive information about the condition
of your frequency converter right before entering
the alarm mode.
[Info] supplies information about a command,
parameter, or function in any display window.
[Info] provides detailed information whenever
help is needed.
Exit info mode by pressing either [Info], [Back], or
[Cancel].
Navigation Keys
The four navigation arrows are used to navigate
between the different choices available in [Quick
Menu], [Main Menu] and [Alarm Log]. Use the
keys to move the cursor.
[OK] is used for choosing a parameter marked by
the cursor and for enabling the change of a para-
meter.
Local Control Keys for local control are found at
the bottom of the control panel.
[Hand On] enables control of the frequency
converter via the LCP. [Hand on] also starts the
motor compressor, and it is now possible to enter
the motor compressor speed data by means of
the arrow keys. The key can be selected as Enable
[1] or Disable [0] via par. 0-40 [Hand on] key on
LCP.
External stop signals activated by means of
control signals or a serial bus will override a .start.
command via the LCP.
The following control signals will still be active
when [Hand on] is activated:
• [Hand on] - [Off ] - [Auto on]
• Reset
• Coasting stop inverse
• Reversing
• Set-up select lsb - Set-up select msb
• Stop command from serial communication
• Quick stop
• DC brake
[Off] stops the connected motor compressor. The
key can be selected as Enable [1] or Disable [0] via
- par. 0-41 [Off ] key on LCP. If no external stop
(Cut-in 3.0bar)
function is selected and the [Off ] key is inactive
Par. 13-12 [0] *
the motor compressor can be stopped by dis-
connecting the voltage.
(Cut-in 1.0bar)
Par. 13-12 [1] *
[Auto On] enables the frequency converter is
to be controlled via the control terminals and/
Par. 13-20 [1] *
Time
or serial communication. When a start signal is
applied on the control terminals and/or the bus,
the frequency converter will start. The key can be
selected as Enable [1] or Disable [0] via par. 0-42
[Auto on] key on LCP.
NB : An active HAND-OFF-AUTO signal via the
digital inputs has higher priority than
the control keys [Hand on] . [Auto on].
[Reset] is used for resetting the frequency
converter after an alarm (trip). It can be selected
as Enable [1] or Disable [0] via par. 0-43 Reset Keys
on LCP.
The parameter shortcut can be carried out by
holding down the [Main Menu] key for 3 seconds.
The parameter shortcut allows direct access to
any parameter.
Quick Transfer of Parameter Settings
Once the set-up of a drive is complete, we recom-
mend that you store the data in the LCP or on a PC
via MCT 10 Set-up Software Tool.
Data storage in LCP
1. Go to par. 0-50 LCP Copy
2. Press the [OK] key
3. Select .All to LCP.
4. Press the [OK] key
All parameter settings are now stored in the LCP
indicated by the progress bar.
When 100% is reached, press [OK].
NB: Stop the motor compressor before perfor-
ming this operation.
You can now connect the LCP to another frequen-
cy converter and copy the parameter settings to
this frequency converter as well.
Data transfer from LCP to drive
1. Go to par. 0-50 LCP Copy
2. Press the [OK] key
3. Select .All from LCP
4. Press the [OK] key
The parameter settings stored in the LCP are now
transferred to the drive indicated by the progress
bar. When 100% is reached, press [OK].
NB: Stop the motor compressor before perfor-
ming this operation.
Intialisation to Default Settings
Initialise the frequency converter to default set-
tings in two ways:
Recommended initialisation (via par. 14-22)
1. Select par 14-22
2. Press [OK]
3. Select "Initialisation"
4. Press [OK]
5. Cut Off the mains supply and wait until the dis-
play turns off.
6. Reconnect the mains supply - the frequency
converter is now reset.
AN000086420674en-000201 | 15
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