Pixsys DRR450 User manual

DRR450

Controller - Regolatore

User manual - Manuale installatore

Summary

1 Safety guide lines ................................................................................4

2 Model identication ........................................................................... 4

3 Technical data ......................................................................................5

3.1 Main features ..............................................................................5

3.2 Hardware features.....................................................................5

3.3 Software features ...................................................................... 5

4 Size, installation and wiring diagram ...........................................6

4.1 Electrical wirings .......................................................................7

5 Leds and key function ........................................................................ 8

5.1 Meaning of status lights (LED) ...............................................8

5.2 Key .................................................................................................9

5.3 Dip switch ....................................................................................9

6 Controller functions............................................................................9

6.1 Automatic tuning ......................................................................9

6.2 Manual tuning .........................................................................10

6.3 Synchronized tuning ...............................................................10

6.4 Automatic/manual regulation for % output control .....11

6.5 Loading default values ..........................................................12

6.6 Heater Break Alarm on TA (Current Transformer) ........... 12

6.7 Dual Action Heating-Cooling ..............................................12

7 Serial communication .....................................................................15

8 Table of conguration parameters ..............................................19

9 Alarm intervention modes ..............................................................26

10 Table of Anomaly Signals................................................................29

11 Summary of conguration parameters ......................................30

Sommario

1 Norme di sicurezza ...........................................................................32

2 Identicazione del modello ............................................................ 32

3 Dati tecnici ..........................................................................................33

3.1 Caratteristiche generali .........................................................33

3.2 Caratteristiche hardware ......................................................33

3.3 Caratteristiche software ........................................................33

4 Dimensioni, installazione e schema di collegamento ............34

4.1 Collegamenti elettrici ............................................................35

5 Funzione dei led e del tasto ............................................................36

5.1 Signicato delle spie di stato (led) .......................................36

5.2 Tasto ............................................................................................ 37

5.3 Dip switch ..................................................................................37

6 Funzioni del regolatore ...................................................................37

6.1 Tuning “Automatico” ..............................................................37

6.2 Lancio dell’AutoTuning “Manuale” ..................................... 38

6.3 Tuning “sincronizzato” ...........................................................38

6.4 Regolazione automatico / manuale

per controllo % uscita .............................................................39

6.5 Caricamento valori di default ..............................................40

6.6 Heater Break Alarm su TA

(Trasformatore Amperometrico) .........................................40

6.7 Funzionamento in doppia azione (caldo-freddo) ..........41

7 Comunicazione Seriale ....................................................................43

8 Tabella parametri di congurazione ...........................................47

9 Modi d’intervento allarme ..............................................................55

10 Tabella segnalazioni anomalie .....................................................58

11 Summary of conguration parameters ......................................59

User manual - DRR450 5

Introduction

Thanks for choosing a Pixsys controller.

The DRR450 series integrates in a single device the main

elements of the control loop: reading of temperature

sensor, control output by SSR module, reading and control

of the current on the load by means of integrated current

transformer. Serial communication RS485 and ModbusRTU

protocol allow the connection to PC/HMI Panels for

supervisory functions/remote control.

A second output is available for alarm or management of

cooling systems for double PID action.

 Safety guide lines

Read carefully the safety guidelines and programming

instructions contained in this manual before using/

connecting the device.

Disconnect power supply before proceeding to hardware

settings or electrical wirings.

Only qualied personnel should be allowed to use the device

and/or service it and in accordance to technical data and

environmental conditions listed in this manual.

Do not dispose electric tools together with household waste

material. In observance European Directive 2002/96/EC on

waste electrical and electronic equipment and its implemen-

tation in accordance with national law, electric tools that have

reached the end of their life must be collected separately and

returned to an environmentally compatible recycling facility.

 Model identication

DRR-A-T

Power supply Vdc ±% +  logic output

Vdc/ma +  logic output Vdc/ma

+ RS +current transformer

6 DRR450 - User manual

 Technical data

. Main features

Operating

temperature -°C, humidity ..uR%

Sealing IP

Material PA  ULV self-exstinguishing

Weight  g

. Hardware features

Analogue

input

AN

Congurable via software

Input

Thermocouple type

K, J, T, E. Automatic

compensation of cold

junction from °C to

°C.

Tolerance (°C)

±. % Full scale

±  tenth of degree.

Cold junction accuracy

.°C/°C

Command

output

 logic output.

For connection to SSR

Celduc SU/SUL series.

 Vdc mA

Auxiliary

output

 logic output.

Congurable as alarm or

cooling control output

in double loop mode.

 Vdc mA

. Software features

Regulation

algorithms

ON-OFF with hysteresis.

P, PI, PID, PD proportional time.

Proportional band ...°C or °F

Integral time ,..., sec ( excludes integral

function)

User manual - DRR450 7

Derivative time ,..., sec ( excludes derivative

function)

Controller

functions

Manual or automatic tuning, congurable

alarm, Start/Stop.

 Size, installation and wiring diagram

8 DRR450 - User manual

. Electrical wirings

Although this controller has been designed to

resist noises in industrial environment, please

notice following safety guidelines:

· Separate control lines from the power wires

· Avoid the proximity of remote control switches, electro-

magnetic meters, powerful engines.

· Avoid the proximity of power groups, especially those with

phase control.

Power Supply

Vdc ±% – VA

Analogue input AN

For thermocouples K, J, T, E.

 

 

compensated cable and terminals

suitable for the thermocouples used

(compensated)

 

grounded at one side only.

Serial input

Communication RS485 Modbus RTU/Slave

User manual - DRR450 9

Logic output OUT1

 

Celduc SU/SUL series.

 

Logic output OUT

 

 Leds and key function

. Meaning of status lights (LED)

OUT 1

 

 

frequency.

 

at 0.5s frequency if the operation has been done



led if the operation was not succesfull.

AL

 



AL. 1



 

AL. 1

is disabled or selected



Heater Break Alarm:

a. ON xed: SSR in short circuit.

b. Flashing 50ms: open charge.

c. Flashing 0.5s: partial lack of the charge.

COM  

DRR450 - User manual

. Key

Teach

 

more than 3 seconds to manage the threshold

current reading for the Heater Break Alarm

control.

 

assignment function, it stores the value assigned

by the master (only if the dips are all in OFF).

. Dip switch

1

ON

2

3

4

5

6

7

8

 

for the modbus is selected on parameter 29

sL. a d .

 

eeprom data are loaded with default values

(DEFAULT setting)

 

Modbus in binary code (contact 8 excluded).

 



  



 Controller functions

. Automatic tuning



Tu n e

word 2005).

Automatic tuning is always active and analyses constantly the

dierence setpoint-process. If this dierence is greater than

the value selected on parameter 7

m.G.tu.

(Max Gap Tune),

the DRR450 decides autonomously when to modify PID

parameters.

User manual - DRR450

. Manual tuning

Select 2 on parameter 5 (

Tu n e

word 2005).



deciding when to update PID algorithm parameters.

         



The reference threshold to calculate the new PID parameters

is given by the result of the following operation:

Tune thresholdSetpointPar. 

s.d.tu.

(word

2006)

      

s.d.tu.

is 20.0°C, the



N.B.: for greater accuracy in the calculation of PID parameters

it is recommended to launch the manual tuning when the

process is far from setpoint.

. Synchronized tuning

Select 3 on parameter 5 (

Tu n e

word 2005).

This procedure has been conceived to calculate correct PID

values on multi-zone systems, where each temperature is



device works as follows:

Word  value Action

Tune o.

Command output OFF

Command output ON

Tune active

Tune completed: command output OFF

The operation of this Tuning mode is the following: the master



for a time long enough to create inertia on the system. At this

DRR450 - User manual



controller calculates the new PID values. When the procedure

ends, it switches-o the control output and sets the value 4



          



The various devices will regulate the temperature basing on

the new values.

          

        

autotuning procedure.

. Automatic/manual regulation for %

output control

This function allows to select automatic functioning or

manual command of the output percentage. With parameter

28 (

au.ma.

word 2028), you can select two methods.





       



 

2. The second selection (value 2 of word 2028) enables the

same functioning, but with two important variants:

           

the manual functioning will be maintained as well as the

previously set output percentage value.

        

controller moves to manual mode while maintaining the

output percentage command unchanged as generated by

the P.I.D. immediately before breakage.

User manual - DRR450

. Loading default values

This procedure allows to restore default settings as

pre-selected at the factory.

There are two reset modes:

 

 

After the restore, device restarts.

. Heater Break Alarm on TA (Current

Transformer)

This function allows to measure load current to manage an

alarm during a malfunctioning with power in short circuit,

always open or partial break of the charge.

        

must be 50mA (sampling time 80 ms).

    

H,b.a.t.

the Heater Break Alarm

intervention threshold in Ampere. Otherwise it is possible

to select this value in automatic mode pressing for more

than 3 seconds.

 

H,b.a.d.

the delay time in seconds for the

Heater Break Alarm intervention.

           



aL. 1.

The Solid State Relay malfunctions are reported as follows:

 AL ON.

 AL 

            AL



. Dual Action Heating-Cooling

DRR450 is suitable also for systems requiring a combined

heating-cooling action.

DRR450 - User manual

The command output has to be congured as PID for

  

p. b.

        

         

AL. 1

).

The command output must be connected to the actuator

responsible for heating, while the alarm will control cooling

action.

Parameters to be congured for the heating PID are:

p. b.



t.i .



t.d.



t. c.



Parameters to be congured for the cooling PID are:

AL. 1



p. b .M.

(word 25): Proportional band multiplier

ou.d.b.

(word 26): Overlapping / Dead band

co.c.t.

(word 27): Cooling time cycle

Par.

p. b .M.

        

proportional band of cooling action basing on the formula:

Proportional band for cooling action

p. b.

*

p. b .M.

This gives a proportional band for cooling which will be the

same as heating band if

p. b .M.



p. b .M.



Integral and derivative time are the same for both actions.

The par.

ou.d.b.

determines the percentage overlapping

between the two actions. For systems in which the heating

output and cooling output must never be simultaneously

active a dead band (

ou.d.b.

≤ 0) must be congured, vice

versa you can congure an overlapping (

ou.d.b.

> 0).

The following gure shows an example of dual action P.I.D.

(heating-cooling) with

t.i .



t.d.



User manual - DRR450

SPV

PV

ATTIVO

ACTIVE

ATTIVO

ACTIVE

P. b .

x

P.b.m.

(COOL)

ou.d.b

< 0

P. b .

(HEAT)

COMMAND OUTPUT (HEAT)

ALARM OUTPUT (COOL)

SPV

PV

ATTIVO

ACTIVE

ATTIVO

ACTIVE

P. b .

x

P.b.m.

(COOL)

ou.d.b



P. b .

(HEAT)

COMMAND OUTPUT (HEAT)

ALARM OUTPUT (COOL)

SPV

PV

ATTIVO

ACTIVE

ATTIVO

ACTIVE

P. b .

x

P.b.m.

(COOL)

ou.d.b

> 0

P. b .

(HEAT)

COMMAND OUTPUT (HEAT)

ALARM OUTPUT (COOL)

The parameter

co.c.t.

has the same meaning as the heating

time cycle

t. c.

Par. 24

co.c.t.

(Cooling Fluid – word 2024) pre-selects the

proportional band multiplier

p.b.m.

and the cooling PID cycle

time

co.c.t.



DRR450 - User manual

co o . f.

Cooling uid

type

p.b.m. co.c.t.

Ai r

Air  

oi L

Oil  4

H2o

Water 2.50 2

Once selected the parameter

co o . f.

, parameters

p.b.m.

,

ou.d.b

and

co.c.t.

can however be modied.

 Serial communication

       

broadcast data via serial communication using MODBUS RTU

protocol.

The device can only be congured as a Slave.

This function enables the control of multiple controllers

connected to a supervisory system/SCADA.

If contacts of dip-switch are all open each controller responds

to a Master query only if the query contains the same address

as parameter 29

SL.a.d.



not be controllers with the same address on the same line.

Address 255 can be used by the Master to communicate with

all the connected equipment (broadcast mode), while with

0 all the devices receive the command, but no response is

expected.

DRR450 can introduce a delay (in milliseconds) of the

response to the master request. This delay must be set on

parameter 32

Se. d e.

Each parameter modication is saved by the controller in

       



modication.

NB: Changes made to words that are dierent from those

User manual - DRR450

reported in the following table can lead to malfunction.

Modbus RTU protocol features

Baud-rate

Selectable on par. 

bd. rt.

Value : bit/sec Value : bit/sec

Value : bit/sec Value : bit/sec

Value : bit/sec Value : bit/sec

Value : bit/sec Value : bit/sec

Value : bit/sec

Format

Selectable on par. 

s. p. p.

Value : N Value : N

Value : E Value : E

Value : O Value : O

Supported

functions

WORD READING (max  word) (x, x)

SINGLE WORD WRITING (x)

MULTIPLE WORDS WRITING (max  word) (x)

  

Modbus

address Description Read

Write

Reset

value

 Type of device RO EEPROM

Software version RO EEPROM

Slave address R/W EEPROM

 Automatic addressing WO -

 System code comparison WO -

 Loading default values (write ) RW 

 Process (tenth of degree) RO ?

 Command setpoint (tenth of degree) R/W EEPROM

 Alarm  setpoint (tenth of degree) R/W EEPROM

DRR450 - User manual

Modbus

address Description Read

Write

Reset

value



Start/Stop





R/W 









RO 







R/W 

With synchronized tuning (word







cooling)



heating)





R/W 

 Automatic/manual selection

 R/W 







OUT



OUT

RO 











RO 

 

 RO 

User manual - DRR450

Modbus

address Description Read

Write

Reset

value

























charge)

RO 

 Cold junction temperature (degree

with tenth) RO ?

 Hot output percentage (-) R/W 

 Cold output percentage (-) R/W 

 Current TA (ampere with tenth) RO ?

 Current TA ON (ampere with tenth) RO ?

 Current TA OFF (ampere with tenth) RO ?

 Key status RO 

 Dip value RO 

 Parameter  R/W EEPROM

 Parameter  R/W EEPROM

 Parameter  R/W EEPROM

 Parameter * R/W EEPROM

 Parameter  R/W EEPROM

 Parameter  R/W EEPROM





20 DRR450 - User manual

 Table of conguration parameters

1

s e n .1

Sensor 1



Word modbus 2001

 

 Default

2 Tc-T 0…400°C

3 Tc-E 0…540°C

2

o.ca.1

Oset Calibration AI1

Value added/subtracted to visualized process value (nor-

mally used to correct ambient temperature value)

Word modbus 2002

-…+ tenths of degree. >Default: 0.



3

G . c a .1

Gain Calibration AI1

% value multiplied with displayed number to calibrate

process value.

Word modbus 2003

-%…+ % in tenths. >Default: 0.



4

c. Hy .

Command Hysteresis

Hysteresis in ON/OFF or dead band in P.I.D.

Word modbus 2004

-…+ tenths of degree. >Default: 0.



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Pixsys DRR450 User manual

Pixsys DRR450 User manual

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