Novus N322PID User manual

TEMPERATURE CONTROLLER
N322PID
OPERATING MANUAL - V1.7x E
Man 5001266
The N322-PID is a 2-output digital electronic controller with PID control algorithm, intended for
heating and cooling applications. The input sensors available are NTC thermistor, Pt100 or
J/K/T type thermocouples. Sensor offset correction is provided. The 2 independent outputs
can be used as control or alarm.
The features of a particular model (input sensor type, sensor range, mains supply, etc) are
identified by the label placed on the controller body.
SPECIFICATIONS
INPUT SENSOR: The sensor is chosen by the user at the time of purchase and is presented
on the upper side of the equipment box. The options are:
•Thermistor NTC, 10 kΩ@ 25 °C; Range: –50 to 120 °C (–58 to 248 °F); Accuracy: 0.6 °C
(1.1 °F);
Maximum error in the interchangeability of original NTC sensors: 0.75 °C (33.35 °F). This
error can be eliminated through the offset parameter of the equipment.
Note: For the NTC thermistor option, the sensor comes with the equipment. Its operating
range is limited to –30 to +105 °C (–222 to +221 °F). It has cable of 3 m in length, 2 x 0.5
mm², and can be extended up to 200 meters.
•Pt100; Range: –50 to 300 °C (–58 to 572 °F); α= 0,00385; 3 wires;
Accuracy: 0.7 °C (1.3 °F); according to IEC-751 standards;
•Pt1000; Range: –200 to 530 °C (–328 to 986 ºF); α= 0,00385; 3 wires;
Accuracy: 0.7 °C (1.3 °F);
•Thermocouple type J; Range: 0 to 600 °C (32 to 1112 °F); Accuracy: 3 °C (5.4 °F);
•Thermocouple type K; Range –50 to 120 °C (–58 to 248 °F); Accuracy: 3 °C (5.4 °F);
•Thermocouple type T; Range: –50 to 120 °C (–58 to 248 °F); Accuracy: 3 °C (5.4 °F);
Thermocouples according to IEC-584 standards.
WARM-UP: 15 minutes
MEASUREMENT RESOLUTION:
0.1 °C: from –19.9 to 199.9 °C (-3.8 to 391.8 °F) With NTC, Pt100.
1°C: elsewhere
Note: The equipment keeps its precision all over the range, despite the lack of display
resolution in a part of the range does not allow its visualization.
OUTPUT1: Relay: 16 A / 250 Vac, SPDT
OUTPUT2: Logic pulse for SSR drive: 5 V max / 25 mA
POWER SUPPLY: 100~240 Vac (± 10 %, 50~60 Hz)
Power consumption: 5 VA
Caution: check the power supply specification before energizing the controller.
DIMENSIONS: Width x Height x Depth: 74 x 32 x 75 mm
Panel cut-out: 70 x 29 mm; Weight: 100 g
ENVIRONMENT: Operating temperature: 0 to 40 °C (32 to 104 °F)
Storage temperature: -20 to 60 °C (-4 to 140 °F)
Relative humidity: 20 to 85 % no condensing
CASE: Polycarbonate UL94 V-2; Protection: Front panel: IP65, Box: IP42
Suitable wiring: Up to 4.0 mm²
Serial interface isolated from input circuitry.
ELECTRICAL WIRING
Fig. 1 below shows the controller connections to sensor, mains and outputs.
Fig. 1 – N322PID terminals
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.
OPERATION
The controller requires the internal parameters to be configured according to the intended use
for the instrument. The parameters are organized in 4 groups or levels:
Level Function
0 Temperature measurement
1 Setpoint Adjustment
2 Configuration
3 PID control parameters
4 Calibration
Upon power-up, the controller display shows for 1 second its firmware version. This
information is useful when consulting the factory.
Then, the temperature measured by the sensor is shown on the display. This is the parameter
level 0(temperature measurement level).
To access level 1, press for 1 second until the “SP1” message shows up. Pressing
again, the “SP2” parameter is presented. To go back to level 0, press once more.
To access level 2 of paramenters, press for 2 seconds until the “uNT” message is
shown. Release the key to remain in this level. Each new pressing on the key will
advance to the next parameter in the level. At the end of the level, the controller returns to the
first level (0). Use the and keys to alter a parameter value.
Notes: 1 A parameter configuration is saved when the key is pressed to advance to
the next parameter in the cycle. The configuration is stored in a non-volatile
memory, retaining its value when the controller is de-energized.
2If no keyboard activity is detected for over 20 seconds, the controller saves the
current parameter value and returns to the measurement level.
Level 1 – Setpoint Adjustment
In this level only the Setpoint (SP1 and SP2) parameters are available, alternating the
names with their respective values. Adjust the desired temperature for each setpoint clicking
on the and keys.
SP1
Set Point 1
Temperature adjustment for control OUTPUT 1. SP1 value is limited to the
values programmed in
SPL
and
SPk
in the programming level (Parameter
configuration, level 2).
SP2
Set Point 2
Temperature adjustment for control OUTPUT 1. SP2 value is limited to the
values programmed in
SPL
and
SPk
Level 2 – Configuration - Parameters configuration Level
Contains the configuration parameters to be defined by the user, according to the system’s
requirements. Use and keys to set the value. The display alternates the parameter
name and respective value.
Unt
Temperature Unit -
Selects display indication for degrees Celsius or
Fahrenheit.
0
– Temperature in degrees Celsius
1
– Temperature in degrees Fahrenheit
typ
Input Type -
Selects the input sensor type to be connected to the
controller. Available only
for thermocouple models, allowing selection of
types J, K and T.
0
- Thermocouple type J
1
- Thermocouple type K
2
- Thermocouple type T
ofs
Sensor Offset - Offset value to be added to the measured temperature to
compensate sensor error.
spl
SP Low Limit - Lower range for
SP1
and
SP2
.
SPL must be
programmed with a lower value than
spK
.
spK
SP High Limit - Upper range for
SP1
and
SP2
.
SPx
must be greater
than
spl
.
ky1
OUTPUT 1 Hysteresis
: defines the differential range between the
temperature value at which the OUTPUT 1 is turned on and the value at
which it is turned off. In degrees.
ky2
OUTPUT 2 Hysteresis
: defines the differential range between the
temperature value at which the OUTPUT 2 is turned on and the value at
which it is turned off. In degrees.
Ac1
Control action for OUTPUT 1 :
0
Reverse: For heating applicat
ions. Outputs turn on when
temperature is lower than SP.
1
Direct: For cooling applications. Output turns on when temperature is
above SP.
Ac2
Action 2 - Control OUTPUT 2 action or Alarm funtions:
0
Reverse control action (heating).
1
Direct control action (cooling).
2
Low (minimum) temperature alarm.
3
High (maximum) temperature alarm.
4
Alarm for temperature inside the range
5
Alarm for temperature outside the range.
6
Low temperature alarm with initial blocking.
7
High temperature alarm with initial blocking.
8
Inside range alarm with initial blocking.
9
Outside range alarm with initial blocking.
The section Working with the Controller describes how these functions
work.
(nt
Control - Associates Setpoints and Outputs.
0
Setpoint 1 is assigned to OUTPUT1 and Setpoi
nt 2 to OUTPUT2
(factory setting).
1
Setpoint 1 is assigned to OUTPUT2 where as Setpoint 2 is directed
to OUTPUT1.

Level 3 – PID control parameters
This level contains the parameters of PID control to be defined by the user, according to the
system’s requirements. The display alternates the parameter name and respective value.
atn
Auto-Tune: Activates the auto-tuning of PID parameters.
0
Auto-tune is off;
1
Auto-tune is on;
Pb
Proportional Band: Percentage of the maximum input span. Select zero
for ON/OFF control.
IR
Integral Time: Integral time constant in repetitions per minute (Reset).
This parameter is not used when controller is set to ON/OFF action
(Pb=0).
Dt
Derivate Time: Derivative time constant in seconds. This constant is not
used when controller is set to ON/OFF action (Pb=0).
ct
Cycle Time: Pulse Width Modulation (PWM) period in seconds. This
term is not used when controller is set to ON/OFF action (Pb=0).
Level 4 – Calibration level
The controller is factory calibrated. The following parameters should be accessed only by
experienced personnel. To enter this cycle, the key must be kept pressed for 4 seconds.
Don’t press the and keys if you are not sure of the calibration procedures.
Just press the key a few times until the temperature measurement level is reached
again.
pas
Password - Enter the correct password to unlock write operations for the
parameters in the following levels.
[Al
Calibration low - Offset value of the input. It adjusts the lower
measurement range of the sensor.
[Ak
Calibration High - Gain calibration. It adjusts the upper measurement
range of the sensor.
[JL
Cold Junction Offset calibration - This parameter is available only for
thermocouple.
FA(
Factory Calibration - Restores factory calibration parameters. Change
from 0to 1to restore the calibration parameters with factory values.
Prt
Protection - Defines the levels of parameters that
will be password
protected. See "Configuration Protection" for details.
Pa(
Password Change - Allows changing the current password to a new one.
Values from 1 to 999 are allowed.
Sn2
Serial number - First part of the controller electronic serial number.
sn1
Serial number - Second part of the controller electronic serial number.
sn0
Serial number - Third part of the controller electronic serial number.
WORKING WITH THE CONTROLLER
Multiple output controllers are suited for controlling multiple stage systems.
Other applications require OUTPUT 1 to be the control output and OUTPUT 2 to be the alarm.
There are eight distinct alarm functions implemented in OUTPUT 2, selected by the parameter
Ac2, described below:
2- Low temperature alarm – OUTPUT 2 is turned on when the measured temperature
falls below the SP2 value.
3- High temperature alarm – OUTPUT 2 is turned on when the measured
temperature exceeds the value programmed in SP2.
4- Inside range alarm – OUTPUT 2 is turned on when the measured temperature is
within the range defined by:
(SP1 – SP2) and (SP1 + SP2)
5- Outside range alarm: OUTPUT 2 is turned on when the temperature falls outside
the range defined by:
(SP1 – SP2) and (SP1 + SP2)
Functions 6, 7, 8e 9are identical to the above ones except that they incorporate the Initial
Blocking feature, which inhibits the output if an alarm condition is present at start-up. The
alarm will be unblocked after the process reaches a non-alarm condition for the first time.
In a multiple stage application, SP1 and SP2 are configured to operate at different
temperatures, creating a progressive sequence for turning on the outputs (compressors) in
response to a system demand. The output delays for turning on the compressors (dL1 and
dL2) cause the compressors to be turned on one by one, minimizing energy demand.
Another usage for multiple output controllers is in systems that require automatic selection
between cool and heat action. In these applications, one output is configured as reverse
action (heating) and the other as direct action (refrigeration). The output status led P1 and P2
in the controller panel, signals when the control output in on.
CONFIGURATION PROTECTION
A protection system to avoid unwanted changes to the controller parameters is implemented.
The level of protection can be selected from partial to full. The following parameters are part
of the protection system:
Pas When this parameter is presented, the correct password should be entered to allow
changes of parameters in the following levels.
Prt Defines the level of parameters that will be password protected:
1 - Only calibration level is protected (factory configuration);
2 - Calibration and Configuration levels are protected;
3 - All levels are protected - calibration, Configuration and setpoints.
PA( Parameter for definition of a new password. Since it is located in the calibration level,
can only be changed by a user that knows the current password. Valid passwords are
in the range 1 to 999.
CONFIGURATION PROTECTION USAGE
PAS parameter is displayed before entering a protected level. If the correct password is
entered, parameters in all following levels can be changed. If 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.
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 in 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 97123465 is: 1 9 3 6
as follows: 1 + sn2= 97; 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.
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:
Measured temperature
exceeded maximum allowed range for the
sensor. Broken Pt100 or T/C. Short circuited NTC sensor.
Measured temperature is below minimum measurement range of the
sensor. Short circuited Pt100 or T/C. Broken NTC.
WARRANTY
Warranty conditions are available on our website www.novusautomation.com/warranty.