N480D Controller
NOVUS AUTOMATION
2/6
MODBUS memory in the documentation of your supervisory software
to conduct the MONITORING process.
Follow the procedure below to use the USB communication of the
equipment:
1.
Download the
NConfig
software from our website and install it on
your computer. The USB drivers necessary for operating the
communication will be installed together with the software.
2.
Connect the USB cable between the equipment and the computer.
The controller does not have to be connected to a power supply.
The USB will provide enough power to operate the communication
(other equipment functions cannot operate).
3.
Open the
NConfig
software, configure the communication and start
recognition of the device.
The USB interface IS NOT SEPARATE from the signal
input (PV) or the controller’s digital inputs and outputs.
It is intended for temporary use during
CONFIGURATION and MONITORING periods. For the
safety of people and equipment, it must only be used
when the piece of equipment is completely
disconnected from the input/output signals. Using the
USB in any other type of connection is possible but
requires a careful analysis by the person responsible
for installing it.
CONFIGURATION AND OPERATION
Prior to first operation the controller should be fully configured. The user
must set basic parameters as temperature type (
TYPE
), the desired
control set point (
SP
), the alarms set points (
A1SP
and
A2SP
), etc.
The configuration can be performed directly on the controller or through
the USB interface. The
NConfig
software (free) is the configuration
management tool. Connected to the USB of a
Windows
computer, the
controller is recognized as a serial communications port (COM) running
with a Modbus RTU protocol.
Through the USB interface, even if disconnected from the power supply,
the configuration performed in a piece of equipment can be can be saved
in a file and repeated in other pieces of equipment that require the same
configuration.
PARAMETERS FLOW CHART
The programming parameters are organized in 5 different cycles
(parameter groups):
- Operation cycle;
- Tuning cycle;
- Program cycle;
- Input cycle;
- Calibration cycle.
When Turned On, the controller displays the first screen of the
Operation Cycle. This screen shows on the red display (top), the
measured temperature value (PV) and also the
Set Point
value of the
process (desired temperature for the process) on the green display
(bottom). During operation, the controller continues showing this
screen. In order to access other screens of this cycle, just press
.
All other Cycles are accessed when changes are required to the
controller’s configuration. In order to access these cycles just
hold
down
the
key for approximately three seconds. After this time, the
controller displays the first parameter of the next cycle (Tuning Cycle).
Holding the key down for three seconds, the next cycle (Input Cycle) is
also accessed.
Release the
key in the desired cycle. Press the
key again to
access all other parameters of this cycle. The
key allows to return
parameters within the cycle.
The upper display shows the parameter and the lower display shows
the value of this parameter. The
and
keys allow the operator
to change the value of the shown parameter.
After accessing the last parameter of the cycle, the controller returns to
the Operation cycle, indicating the temperature process and SP. With
the keyboard inactive for more than 20 seconds, the controller also
returns to the Operation cycle.
The value of the changed parameter is saved to permanent memory
and used by the controller when going to the next parameter, or if no
key is pressed within 20 seconds.
PROTECTION OF CONFIGURATION
The controller allows to protect the configuration elaborated by the
user, avoiding unauthorized changes. The parameter
Protection
(
PROt
), in the Calibration cycle, determines the protection strategy,
limiting the access to particular cycles, as shown by the table below.
PROTECTION
LEVEL
PROTECTED CYCLES
1
Only the Calibration cycle is protected.
2
Input and Calibration cycle.
3
Program, Input and Calibration cycle.
4
Tuning, Program, Input and Calibration cycle.
5
Operation (except SP), Tuning, Program, Input and
Calibration cycle.
6
All cycles are protected.
Table 2
– Levels of Protection for the Configuration
Access Password
The protected cycles, when accessed, request the user to provide the
Access Password
for granting permission to change the configuration
of the parameters on these cycles.
The prompt
PASS
precedes the parameters on the protected cycles.
If no password is entered, the parameters of the protected cycles can
only be visualized.
The Access Password is defined by the user in the parameter
Password Change (
PAS.(
), present in the Calibration cycle.
The new controllers leave the factory with the access password defined
as
1111
.
Protection of the access password
The controller provides a security system that helps prevent input of
numerous passwords trying to get the correct password. When 5 invalid
passwords in a row are identified, the controller stops accepting
passwords for 10 minutes.
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.
