Full Gauge Controls AutoPID plus Quick Start Manual
AutoPID plus
PID TYPE DIG ITAL TEMPERATURE
CONTROLLER
ALRM
TUNE
AUTO
MANU
Ver.02
1. DESCRIPTION
The AutoPID plus is a digital controller for heating and cooling processes. It uses a PID (proportional,
integral, and derivative) type controller, which enables to control the temperature with minimal fluctuation.
Product complies with UL Inc. (United States and Canada).
2. APPLICATION
• Freezing and heating chambers
• Refrigeration plants
• Set of compressors etc.
3. TECHNICAL SPECIFICATIONS
- Power Supply: 90 to 264Vac (50/60 Hz)
- Controlled Temperature: -50 to 100°C (with resolution of 0.1°C)
- Indication Accuracy:0.1°C between -10 and 100°C
- Controlling Accuracy: 0.1°C for the whole scale
- Proportional Outputs: Voltage output: 0~10Vdc 5mA
- Alarm Output: 5(3)A 250Vac 1/8HP
- Dimensions: 71 x 28 x 71mm
- Operation temperature: 0 to 50°C
- Operation humidity: 10 to 90% RH (without condensation)
and 1°C for the rest of the scale
PWM: Adjustable period 5mA
4. CONFIGURATION
4.1 - Setpoint adjustment
SET
Press for 2 seconds until it displays and then release the key. The operation temperature you
set is displayed. Use and keys to change this value and press to configure the new value
when ready.
SET
4.2 - Accessing the function menu
Press and keys simultaneously for 2 seconds until it displays and then release the keys.
When is displayed, press (shortly) and enter the code (123) by using the and keys.
SET
Press to confirm. You can use and keys to access other functions. Use the same procedure
to adjust other functions.
To exit the menu and return to the normal operation, hold the key pressed for a while to display .
SET
SET
4.3 - Advanced functions
Fun
Access code (123)
Static gain
Integral time
Derivative time
Anti-windup time
Setpoint gain in the proportional control
Control type (0 = cooling, 1 = heating)
Output amplitude for autotuning
Temperature hysteresis for autotuning
Steady temperature validation time
Autotuning starting method
Max. amount of time for stabilizing the temperature before autotuning activation
Low temperature alarm
Hysteresis for resetting the low temperature alarm
High temperature alarm
Hysteresis for resetting the high temperature alarm
ON-OFF cycle time for alarm output
PWM output period
Output value in the manual mode
Output value when error occurs
Minimum setpoint allowed to the final user
Maximum setpoint allowed to the final user
Indication offset
RS-485 network address
Description
Min
-99
0.0
0
0
0
0.0
0
10
0.1
1
0
1
-50.0
1.0
-50.0
1.0
0
1
0
0
-50.0
-50.0
-5.0
1
Max
999
99.9
999
999
999
1.0
100
20.0
999
999
100.0
10.0
100.0
10.0
210
999
100
100
100.0
100.0
5.0
247
Default
Unit
0
-
1.0
-
12
x 10 sec.
3
x 10 sec.
4
x 10 sec.
1.0
40
5.0
999
-50.0
1.0
100.0
1.0
50
-50.0
100.0
0.0
-
0
-
%
°C
6
x 10 sec.
0
-
mim.
°C
°C
°C
°C
0
sec.
1
x 10 ms.
0
%
%
°C
°C
°C
1
-
1
3
4.4 - Function description
Access code (123)
The access code is needed when you want to change the configuration settings. If you just want to view
the parameters you don't need to input the access code.
Static gain (K)
This gain actuates in the system error (proportional control) and is related to stabilization time and
control circuit speed. The static gain can be calculated automatically by the autotuning.
Integral time (Ti)
The integrative control is responsible for canceling an error when the system is in a steady condition and
is also responsible for the system stabilization time. This parameter can be calculated automatically by
the autotuning.
Derivative time (Td)
This is responsible for stabilizing the system in the setpoint and canceling the overshoot. It can be
calculated automatically by autotuning, just as the other parameters.
E251415
AUTOPID2-08T-11757
Proportional output anti-saturation system time (Tt)
This is responsible for preventing the proportional control output from becoming saturated due to
integral control action (windup). The value recommended for this function is:
The value for this parameter is calculated automatically at the end of autotuning by using Ti and Td
parameters according to the formula above.
Setpoint influence in the static gain
This is the setpoint gain when calculating the system error. It is used to reduce the effect of an eventual
noise from the temperature sensor. When you reduce this parameter value, you increase the immunity
to noise.
Control type
Indicates the process type that the controller will operate.
Cooling
Heating
Output amplitude for autotuning
Initial amplitude of the signal to be applied in the proportional output during the autotuning stage.
This value is recalculated automatically by the controller during the autotuning and it must be chosen so
that the system can distinguish the temperature oscillation around the setpoint and the hysteresis.
Temperature hysteresis for autotuning
This hysteresis is used together with the setpoint to control the temperature oscillation in the autotuning.
Steady temperature validation time
This is the time used by the controller to make sure that system temperature is steady and stabilized.
Autotuning starting type
This function defines the mode in which the autotuning must be started.
Only manual start;
Performs autotuning when automatic control is activated;
Performs autotuning if the temperature does not stabilize inside the period of time configured
in F12;
Performs autotuning when automatic control is activated or if the temperature does not
stabilize inside the period of time configured in F12.
Max. time for system stabilization
Maximum time for temperature stabilization before executing autotuning (if configured).
Low temperature alarm
Temperature for activating the low temperature alarm.
Hysteresis for resetting the low temperature alarm
Hysteresis for resetting the low temperature alarm.
High temperature alarm
Temperature for activating the high temperature alarm.
Hysteresis for resetting the high temperature alarm
Hysteresis for resetting the high temperature alarm.
ON-OFF cycle time for alarm output
Cycle time in which the alarm output is turned ON and OFF. If the alarm output is intended to remain
always ON, this parameter must be set to “0”.
PWM output period
Total time the PWM output remains in the ON and OFF state. The time for each state depends on the
proportional output value.
Output value in the manual mode
PWM and proportional output value when the controller is in the manual mode.
Output value when a sensor error occurs
PWM and proportional output value when an error occurs in the temperature readings.
Minimum setpoint allowed to the final user
Lower limit to avoid that extremely low temperatures be configured by mistake.
Maximum setpoint allowed to the final user
Upper limit to avoid that extremely high temperatures be configured by mistake.
Indication offset
Allows to compensate an eventual variation of pressure readings caused by sensor replacement.
RS485 network controller address
Device address in the network for communication with Sitrad software application.
®
Warning: it is not allowed to have more than one device with the same address in a network.
5. AUTOTUNING
The AutoPID plus uses the Critical Period method to calculate automatically its PID parameters. This
method consists in making the system temperature oscillate around the setpoint so that the necessary
data can be collected to adjust the controller. The user must input two parameters for the method to work
properly: Temperature Hysteresis (F09) and Output Amplitude (F08). Both parameters must be chosen
to permit a recognizable oscillation around the setpoint. The autotuning operation time will vary for each
response from the system. Systems with a bigger cooling/heating capacity will have quicker responses
and the autotuning function will finish the data collection quicker.
The method for starting the autotuning can be configured in the function F11 and may operate in the
following modes:
Manual activation: The autotuning can be activated either through the controller keyboard or through
®
the Sitrad software.
When activating the automatic control: The autotuning will be executed every time the controller
enters the automatic control mode (PID).
Temperature not steady: The autotuning will be executed every time the temperature does not
stabilize inside the time period programmed in the function F12.
When activating the automatic control and the temperature is not steady: The autotuning will be
executed every time the controller enters in the autotuning mode and when the temperature does not
stabilize inside the time period programmed in the function F12.
If an error occurs during the system data collection, the controller will interrupt the autotuning and emit
an alarm with the message . Then it returns to the operation mode set before the autotuning
activation.
6. EASY ACCESS FUNCTIONS
6.1 - Proportional output value indication
SET
Press the key shortly for displaying the current proportional output value. The percentage value will
be displayed followed by the indication .
6.2 - Minimum/Maximum temperature indication
Press shortly to display the minimum/maximum temperature. When pressing the key, the message
will be displayed indicating the sensor temperature followed by the indication . If you hold the
key pressed, the values are restarted and the message is displayed.
6.3 - Controller operation mode selection
Hold the key pressed for 4 seconds to choose the controller operation mode. After pressing the key,
the message will be displayed followed by the current operation mode. Use the and keys
to choose one of the following options:
Controller OFF
Controller in the manual mode
Controller in the automatic mode
SET
Use the key to confirm the selection and wait the message indicating that the setting is
finished.
6.4 - Canceling the active alar ms
Press the key shortly to cancel the indication of current active alarms. After pressing the key, the
message is displayed and all the current active alarms will be deactivated.
N
O
I
T
EC
N
CON
8.
ALRM
1
212
A
B
n
ial
r
atio
e
c
muni
S485 S
R
com
Red
nsor
e
S
5
3
4
6
7
8
9
10
11
12
Black
GND
0 10Vdc
Proportional
Open collector
Proportional
voltage output
12V Output
PWM output
Power
ac (50/60Hz)
supply
Alarm power
supply
90 264V
To the terminal of
the distribution box
For a current higher than the specified value,
use a power relay for activating the alarm.
®
Keep Sitrad updated in website:
http://www.sitrad.com
A
A
B B
A B
*Connecting Block for Serial Communication
Used to connect more than one instrument to the Interface. The wire's connections must
be made in agreement with the following rules: terminal A of the instrument connects to
the terminal A of the c , that must be connected with the terminal A of the
Interface. Repeat the action for terminals B and , being the cable shield.
the terminal must be connected to the respective terminals of
each instrument.
*Sold Separately
IMPORTANT
According to the chapters from the IEC60364 standard:
1: Install protectors against over voltage on power supply
2: Sensor cables and computer signals can be together, however not at the same place where power
supply and load wires pass for
3: Install suppresor of transient in parallel to loads to increase the usefull life of the relays
A
A
B B
AB
A
B
1
OUT 4
ALMR
OUT
OUT 2
OUT 3
PCT-400R plus
onnecting block
of connecting block
A
B B
B
A
AB
A
Wiring diagram of suppresors in contactors
A1
Suppresor
A2
A1 e A2 are the
contactor coils.
A
A
B B
AB
A
B
1
PUMP
AUX
AUX 2
MICROSOL II plus
Wiring diagram of suppresor for direct drive
Load
Suppresor
A
A
B B
AB
For direct activation the maximum
specified current should be taken
into consideration.
6.5 - Autotuning manual activation/deactivation
You can activate or deactivate the PID parameter autotuning by holding the key pressed for 2
seconds. The message will be displayed followed by the message (for activating) or
(for deactivating). When manually activating the autotuning, its starting conditions described in
item 5 will not be tested.
7 - DISPLAY MESSAGES
Low temperature alarm
High temperature alarm
Autotuning error
Indicates the autotuning was not completed after 12 hours.
Indicates an error occurred in the parameter calculation during the autotuning.
Indicates an error occurred in the temperature reading during the automatic control.
Temperature sensor disconnected or out of range
Invalid parameters configuration
The outputs are turned off automatically in this situation
Please check which parameters have invalid data configured and correct them to return to
normal operation
ENVIRONMENTAL INFORMATION
Package:
The packages material are 100% recyclable. Just dispose it through specialized
recyclers.
Products:
The electro components of Full Gauge controllers can be recycled or reused if it is
disassembled for specialized companies.
Disposal:
Do not burn or throw in domestic garbage the controllers which have reached the end-oflife. Observe the respectively law in your region concerning the environmental
responsible manner of dispose its devices. In case of any doubts, contact Full Gauge
controls for assistance.
PROTECTIVE :VINYL
This adhesive vinyl (included inside the packing) protects the instruments against
water drippings, as in commercial refrigerators, for example. Do the application after
finishing the electrical connections.
Remove the protective paper
and apply the vinyl on the entire
superior part of the device,
folding the flaps as indicated by
the arrows.
Dimension of the clipping
for setting of the instrument
in panel
72 mm
29 mm
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