NOVUS N1040 Controller User Manual
Page 4
N1040 Controller
NOVUS AUTOMATION
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1e.ov
Percentage output value that will be transfer to MV
when the SAFE output function is enabled. If 1eov =
0, the SAFE output function is disabled and the
outputs are turned off in the occurrence of a sensor
fail.
CALIBRATION CYCLE
All of the input and output types are calibrated in the factory. If a
recalibration is required, this should be carried out by a
experienced personnel. If this cycle is accidentally accessed, pass
through all the parameters without pressing the
or keys.
pass
Password. This parameter is presented before the
protected cycles. See item Protection of Configuration.
(alib
Enables or disables instrument calibration by the user,
YES: shows calibration parameters
No: Hides the calibration parameters.
inL(
Input Low Calibration. Enter the value corresponding
to the low scale signal applied to the analog input.
ink(
Input High Calibration. Enter the value corresponding
to the full scale signal applied to the analog input.
rstr
Restore. Restores the factory calibration for all inputs
and outputs, disregarding modifications carried out by
the user.
(j
Cold Junction. This screen is for information purpose
only.
Pas.(
Password Change. Allows defining a new access
password, always different from zero.
Prot
Protection. Sets up the Level of Protection. See Table
04.
Freq
Mains frequency. This parameter is important for
proper noise filtering.
CONFIGURATION PROTECTION
The controller provides means for protecting the parameters
configurations, not allowing modifications to the parameters values,
avoiding tampering or improper manipulation. The parameter
Protection (PROt), in the Calibration level, determines the
protection strategy, limiting the access to particular levels, as shown
by the Table 04.
Protection Level
Protection Levels
1
Only the Calibration level is protected.
2
Calibration and Input levels.
3
Calibration, Input and Alarms levels.
4
Calibration, Input, Alarms and Tuning levels.
5
All levels are protected, but the SP screen in
the operation level.
6
All levels are protected, including SP.
Table 04 – Levels of Protection for the Configuration
ACESS PASSWORD
The protected levels, when accessed, request the user to provide the
Access Password for granting permission to change the
configuration of the parameters on these levels.
The prompt PASS precedes the parameters on the protected levels.
If no password is entered, the parameters of the protected levels can
only be visualized.
The Access Password is defined by the user in the parameter
Password Change (PAS.(), present in the Calibration Level. The
factory default for the password code is 1111.
PROTECTION ACCESS PASSWORD
The protection system built into the controller blocks for 10 minutes
the access to protected parameters after 5 consecutive frustrated
attempts of guessing the correct password.
MASTER PASSWORD
The Master Password is intended for allowing the user to define a
new password in the event of it being forgotten. The Master
Password doesn’t grant access to all parameters, only to the
Password Change parameter (PAS(). After defining the new
password, the protected parameters may be accessed (and
modified) using this new password.
The master password is made up by the last three digits of the serial
number of the controller added to the number 9000. As an example,
for the equipment with serial number 07154321, the master
password is 9 3 2 1.
Controller serial number is displayed by pressing
for 3 seconds.
DETERMINATION OF PID PARAMETERS
During the process of determining automatically the PID parameters,
the system is controlled in ON/OFF in the programmed Setpoint. The
auto-tuning process may take several minutes to be completed,
depending on the system. The steps for executing the PID auto-
tuning are:
Select the process Setpoint.
Enable auto-tuning at the parameter “Atvn”, selecting FAST
or FULL.
The option FAST performs the tuning in the minimum possible time,
while the option FULL gives priority to accuracy over the speed.
The sign TUNE remains lit during the whole tuning phase. The user
must wait for the tuning to be completed before using the controller.
During auto tuning period the controller will impose oscillations to the
process. PV will oscillate around the programmed set point and
controller output will switch on and off many times.
If the tuning does not result in a satisfactory control, refer to Table 05
for guidelines on how to correct the behavior of the process.
PARAMETER
VERIFIED PROBLEM
SOLUTION
Band Proportional
Slow answer
Decrease
Great oscillation
Increase
Rate Integration
Slow answer
Increase
Great oscillation
Decrease
Derivative Time
Slow answer or instability
Decrease
Great oscillation
Increase
Table 05 - Guidance for manual adjustment of the PID parameters
For further details on PID tuning, visit our web site:
MAINTENANCE
PROBLEMS WITH THE CONTROLLER
Connection errors and inadequate programming are the most
common errors found during the controller operation. A final revision
may avoid loss of time and damages.
The controller displays some messages to help the user identify
problems.
MESSAGE
DESCRIPTION OF THE PROBLEM
----
Open input. No sensor or signal.
Err1
Err6
Connection and/or configuration problems.
Check the wiring and the configuration.
Other error messages may indicate hardware problems requiring
maintenance service. When contacting the manufacturer, inform the
instrument serial number, obtained by pressing the key
for more
than 3 seconds.
PROCESS VARIABLE INPUT CALIBRATION
Visit our web site for further information