OPERATION MANUAL
Technical changes reserved
0141 0315-150 29.06.2016
Controller N321
3.2. Configuration Protection Usage
PAS
-parameter:
PAS
-parameter is displayed before entering a protected level. If the correct password is entered, parameters in all following
levels can be changed. If a wrong or no password is entered, parameters in the following levels will be read only.
Important notes:
1. After five consecutive attempts to enter a wrong password, new tentative will be blocked for the next 10 minutes.
If the current valid password is unknown, the master password can be used only to define a new password for the controller.
2. The password for a brand new device is 111.
3.3. Master-Password
The master password allows user to define a new password for the controller, even if the current password is unknown. The
master password is based on the serial number of the controller, and calculated as following:
[ 1 ] + [ higher digit of SN2 ] + [ higher digit of SN1 ] + [ higher digit of SN0 ]
for example the master password for the device with serial number 987123465 is: 1 9 3 6
as follows: 1 +
sn2
= 987;
sn1
= 123;
sn0
= 465 = 1 + 9 + 3 + 6
How to use the master password:
1.
Enter the master password value at „PaS“ prompt.
2. Go to PA( parameter and enter the new password, which must not be zero (0).
3. Now you can use this new password to access all controller parameters with modify rights.
4. Error Messages
Sensor measurement errors force the controller outputs to be turned off. The cause for these errors may have origin in
a bad connection, sensor defect (cable or element) or system temperature outside the sensor working range. The
display signs related to measurement errors are shown below:
5. Electrical Wiring
It is important to follow the recommendations below:
• Signal wires should be installed in grounded conduits and away from power or contactor wires.
• The instrument should have its own power supply wires that should not be shared with electrical motors,
coils, contactors, etc.
•
Installing RC filters (47 R and 100 nF, series combination) is strongly recommended at contactor coils or any
other inductors.
• System failure should always be taken into account when designing a control panel to avoid irreversible damage
to equipment or people.
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