NOVUS Controller N480D - Manual (Page 2)

N480D Controller
NOVUS AUTOMATION 2/6
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 level, determines the protection strategy,
limiting the access to particular levels, as shown by the table below.
Protection
Level
Protected Cycles
1 Only the Calibration level is protected.
2 Input and Calibration level.
3 Program, Input and Calibration level.
4 Tuning, Program, Input and Calibration level.
5 All levels are protected.
Table 2 – Levels of Protection for the Configuration
Access 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 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.
OPERATION LEVEL
TEMPERATURE
INDICATION
Control Set
Point
Temperature indication (PV) and control set
point - When turned on, the controller indicates the
process temperature on the upper display. The lower
display shows the SP value, which is the desired
temperature for the process.
rate
Rate
Temperature increase rate. It allows the user to
define the increase or decrease characteristic of the
process temperature, the current value to the value
programmed in SP. The rate is defined in Degrees
per minute. It is adjustable from 0.0 to 100.0 °C per
minute.
It is available when the Rate option is selected in the
Pr.ty parameter of the Input cycle.
lT SP Level Time: Time interval in minutes, that the
process must remain in the temperature defined in
SP. Adjustable from 0 to 9999.
It is available when the Rate option is selected in the
Pr.ty parameter of the Input cycle.
E pr
Enable
Program
Program Execution – It determines the level and
ramp program execution.
Yes Executes program
No
Does not execute program
With enabled outputs (RvN= YES), the selected
program immediately enters in execution.
It is available when the Pr option is selected in the
Pr.ty parameter of the Input cycle.
Rvn
Run
Screen that enables or disables action of the
controller over the process. It acts as a switch,
turning the controller on or off.
YES Outputs enables.
NO Outputs not enabled.
TUNING LEVEL
Atvn
Auto tune
AUTO-TUNE: It enables automatic tuning of the PID
parameters (pb ,ir, dt). See chapter Determine PID
Parameters herein and at www.novusautomation.com
for more details.
Off Automatic tuning off
Fast Execute tuning in fast mode
full Execute tuning in fine mode
Pb
Proportional
band
PROPORTIONAL BAND: Value of the term P of
the control mode PID. In percentage of the
maximum span of the input type.
When set to zero (0), control action is ON/OFF.
Adjust of between 0 and 500.0 %.
Ir
Integral rate
INTEGRAL RATE: Value of the term I of the control
mode PID, in repetitions per minute. This constant
is not used when controller is set to ON/OFF action
(Pb=0). Adjustable between 0.00 and 55.20.
Dt
derivative time
DERIVATIVE TIME: Value of the term D of the
control mode PID, in seconds. This constant is not
used when controller is set to ON/OFF action
(Pb=0). Ajustable between 0 and 250.
(t
Cycle time
CYCLE TIME: Pulse Width Modulation (PWM)
period in seconds. This constant is not used when
controller is set to ON/OFF action (Pb=0).
Adjustable between 0.5 and 99.99
KySt
HYSterisis
CONTROL HYSTERESIS: Is the hysteresis for
ON/OFF control (set in temperature units). This
parameter is only used when the controller is in
ON/OFF mode (Pb=0).
A1SP
A2SP
Alarm SP
SETPOINT for Alarm 1 and 2: Tripping point for
alarm 1 and 2.