LAC Ht40B User manual

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Ht40B, 01/03, soft 4.11/rev. 1 english
version
Ht40B
PID controller
Users manual
LAC, spol. s r.o.
Štefánikova 116
664 61 RAJHRAD
e-mail: [email protected]z
www.lac.cz

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1 Important
Ht40B is a temperature / process controller intended for the built-in to panel. he format of controller is 96 x 48 mm
(1/8 DIN).
he scope of the controller:
• controlling of stp value,
• controlling Master – Slave (1 controller is supervisory MAS ER, the others are SLAVEs – receive stp value),
• cascade controlling (it is used in systems with long lag times).
he controller can be equipped with 1 input:
• temperature (thermocouples + rtd sensor -Pt100),
• process (0-20mA, 4-20mA, 0-5V, 1-5V, 0-10V),
3 outputs:
• control (heating control),
• auxiliary (cooling control, signalling),
• alarm,
and communication lines:
• RS-232, protocol MODBUS R U,
• EIA-485, protocol MODBUS R U.
he controller is easy to run and operate. he parameters set can be locked and thus preventing from deleting by a user.
User manual for the controller Ht40B is divided into the particular chapters. When you install and put it into operation we
recommend proceeding in the following way:
If you are a final user, the controller is in the default setting by the suplier
If you are a final user, you will get the device in the customized setting and you can view and change only the parameters that
you need for your own work on the controller.
If you are a new user of the device, focus on the following chapters:
• Basic terms, here it is explained the key functions, displays, and so on….
• Basic mode, the description of basic mode of controller.
• User level, in this chapter you will find the information on the parameters accessible for a user and the information on the
basic features of the controller.
If you are carring out the complete installation and setting of the controller
In this case you proceed in accordance with the following chapters:
• Installation, in this chapter it is described how to build in a controller into panel.
• Principals of installation, we recommend you to observe the guidelines described in this chapter.
• Wiring, the description for wiring of the controller.
• Putting into operation, at first power-up you enter the initial menu in which you can configure and set the most important
parameters of controller.
According to the procedure you will perform installation, wiring and basic setting of controller. You can find out more details
on the scope of the controller and its operation in the following chapters.
For the users who have the controller completely set, we recommend to perform the setting of all
the parameters in service level, menu ConF . Initial password for the entry to service level is set to 995.

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2 Basic terms
o avoid problems in operation of device the user should be able to manage its operation, setting parameters, ...
2 1 Operation and description of controller
On the front panel board you can see 2 displays, 3 control lights (LED diodes) for indicating a status of outputs. he device is
set and configured via 4 key-buttons.
Function of indicators
Function of key-buttons
he setting of parameters of the controller is performed via key-board. he function of each key-button is as follows:
• , key for setting and viewing of parameters of user, operation, configuration and user level. By pressing this key you
confirm the change in configured parameter and the controller comes to another parameter.
• , key for decreasing a value of parameter. he value of parameter is either the figure or abbreviation composed of
maximum 4 letters.
• , key for increasing a value of parameter.
• , key for switching between automatic and manual operation, see page 8.
2 2 Information and error messages
Information and error messages are indicated only in basic mode, see page 5.
Information messages, upper display
• ---- … error of input sensor or input is not set.
Information messages, lower display
Information messages on lower display blink, they can be:
• Man … the controller is in manual operation, the output power is set by a user.
• rAMP … indication of ramp function.
• CSCd … indication of cascade controlling.
• Aut1 … starting autotunning of PID set 1 of the output 1, Pb1A , It1A , dE1A .
• Aut2 … starting autotunning of PID set 2 of the output 1, Pb1b , It1b , dE1b .
• Aut3 … starting autotunning of PID set of the output 2, Pb2A , It2A , dE2A .
LED diode „ “
Indicates the state of output 1
LED diode „2“
Indicates the state of output 2
LED diode „Al“
Indicates the state of alarm output
Upper display:
•
Indicates procees value in
Basic mode
•
When set, it shows parameter
value
Lower display:
• Indicates stp value in
Basic mode.
•
When set, it shows the type
of parameter

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Error messages, lower display
If there is a error message indicated then the control outputs are switched OFF, the signal output is switched OFF, the alarm
output is activated.
• Err0 … error in FLASH memory of program. Switch the controller OFF and ON again. If the problem persists, contact
your supplier.
• Err1 … error in EEPROM memory for configuration and operation parameters. he troubleshooting error can be made
by restarting of all parameters in service level. After restart it is necessary to set up all parameters again. his can be done
only by an experienced user. If the trouble persists, contact your supplier.
• Err3 … error in A/D converter. It can be caused by electrical impulse at input, too low temperature and excessive
humidity, … . Switch the controller OFF and ON again. If the problem persists, contact your supplier.
2 3 Overview of levels, menus
For the right function of the controller it is necessary to set up its parameters properly. For better understanding the parameters
are sorted out to groups (levels and menus). Level is superior to menu, menu is a part of level (menu out1 ).
he structure of sorting shows the following picture.
User level
Enables the quickest access to chosen parameters. For this level you can choose
parametrs from operation level and make them accessible for a user.
Switching over between automatic and manual operation
By double pressing the keys you switch the controler between automatic and
manual operation. his function must be allowed in configuration level.
Operation level
he level where the operation parameters find themselves.
Configuration level
Is intended for the configuration of the controller.We recommend to secure this
level with password.
Service level
Is intended for service level.We recommend to secure this level with password.
Double press
for 3 seconds
If there is no password set for the
particular level, parameter PASS will
not apear.
Choose requisite
level by arrow-
keys.
LEVL
oPEr
x
PASS
LEVL
SErV
x
PASS
LEVL
ConF
x
PASS

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3 Basic mode
he controller is in Basic mode when powered up (the initial set-up must be performed, see page 27 ).
On upper display process value is shown, on lower display there can be stp value or heading oFF
(at Master / Slave controlling, if the controller does not receive stp value).
• When controlling to stp value there is stp value shown on lower display.
• When in Master / Slave controlling (the controller is Slave) there is stp value shown on lower display. If the controller
does not receive stp value and switching OFF is set for the output, on lower display heading oFF is lit and the control
output is switched OFF.
• When in cascade controlling there is calculated stp value shown on lower display and heading CSCd blinks.
• When in manual operation there is output power in % shown on lower display and heading Man blinks.
• If there is any other heading on lower display, the controller is not in basic mode, parameters are set or viewed.
• Information and error messages are indicated only in basic mode.
Return to basic mode
• o return to basic mode press shortly the keys .
• If there is no key pressed for 60 seconds, the controller itself returns to basic mode.
On upper display process
value is shown
On lower display stp
value is shovn or it
shows oFF

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4 User level
User level is intended for the quick access to the most common parameters for a user.
o enter user level and to go through this level press the key .
o return from user level you must go trough all the parameters or by pressing shortly the keys .
You can configure freely the structure of user level:
• you can define which parameters and menus will be in user level,
• you can define on which position these parameters(menus) will be placed,
• the parameters and menus are displayed only in case that their showing has the meaning (e.g. the parameters of controlling
are shown only in case that output is set as the control output).
Overview of all the parameters and menus of user level
Display Procedure
PCn1 Indicates the power in % of the control output . It is displayed only then if the output 1 is set as the control output.
PCn2 Indicates the power in % of the control output 2. It is displayed only then if the output 2 is set as the control output.
AoFF Menu for switching OFF of permanent alarm. Set YES and confirm to switch OFF the permanent alarm.
Aut
Starting / ending of autotunning/automatic setting of PID parameters:
• oFF, autotunning /automatic setting of PID parameters is turned OFF.
• ht, starting of autotunning/automatic setting of PID parameters for heating
• CL, starting of autotunning/automatic setting of PID parameters for cooling.
L-r
Selection for setting of stp value:
• L, stp value is local (it is set in the controller).
• M-S, remote setting of stp value via communication line, it is used for system Master-Slave.
• CSCD, remote setting of stp value via communication line, it is used for cascade controlling
dIF Difference of remote stp value for system Master-Slave.
Range: -499 to 499 °C.
CdLo Low limit range of remote setting stp value for cascade controlling.
Range: -499 to CdhI °C.
CdhI High limit range of remote setting stp value for cascade controlling.
Range: CdLo to 2499 °C.
Pb1A Proportional band of the output , the first set of PID parameters.
Range: 1 to 2499 °C.
It1A Integral value of the output , the first set of PID parameters.
Range: oFF, 0.1 to 99.9 minutes.
dE1A Derivative value of the output , the first set of PID parameters.
Range: oFF, 0.01 to 9.99 minutes.
Pb1b Proportional band, the second set of PID parameters.
Range: 1 to 2499 °C.
It1b Integral value, the second set of PID parameters.
Range: oFF, 0.1 to 99.9 minutes.
dE1b Derivative value, the second set of PID parameters.
Range: oFF, 0.01 to 9.99 minutes.
hYS1 Hysteresis of the output , this single parameter is set only for ON/OFF control.
Range: 1 to 249 °C.
Pb2A Proportional band of the output 2.
Range: 1 to 2499 °C.
It2A Integral value of the output 2.
Range: oFF, 0.1 to 99.9 minutes.
dE2A Derivative value of the output 2.
Range: oFF, 0.01 to 9.99 minutes.
hYS2 Hysteresis of the output 2, this single parameter is set only for ON/OFF control.
Range: 1 to 249 °C.
o2Lo
Low limit of signalling. Output is activated when process value is lower than the set signalling limit.
Range:
• -499 to o2hI °C for ot2 = SGPr.
• -999 to 0 °C for ot2 = SGdE.
o2hI
High limit of signalling. Output is activated when process value is higher than the set signalling limit.
Range:
• o2Lo to 2499 °C for ot2 = SGPr.
• 0 to 999 °C for ot2 = SGdE.

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ALLo
Low limit of alarm. Alarm is activated when process value is lower than the set alarm limit.
Range:
• -499 to ALhI °C for ot3 = ALPr.
• -999 to 0 °C for ot3 = ALdE.
ALhI
High limit of alarm. Alarm is activated when process value is higher than the set alarm limit.
Range:
• ALLo to 2499 °C for ot3 = ALPr.
• 0 to 999 °C for ot3 = ALdE.
Setting of parameters and menus in user level
User level provides a user with the quickest access for viewing and setting of parameters. he list of the parameters that will be
present and accessible for a user in user level, as well as their sequence, can be freely configured.
You will carry out the formation of user level in configuration level, menu uSEr .
Example how to create user menu:
You want to place on the 1st position in user level the parameter for starting autotunning Aut , on the 2nd high limit of
alarm ALhI . Proceed as follows:
• Set the parameter StP1 = Aut .
• Set the parameter StP2 = ALhI .
• 3rd to 8th positions are not used, for parameters StP3 to StP8 set no .
You can view the result in user level
4 1 Controlling of stp value
When the controller maintains stp value, lower display shows stp value and upper display shows process value. Setting of stp
value can be changed with the arrow-keys, the new stp value is edited after approx.
2 seconds form the last pressing of the key.
Ramp function
When the controller is powered up, rapid temperature changes appear. If this rapid increase in temperature is not wanted, you
can control the ramp rate to stp value with the ramp function.
• Ramp function ensures the reaching stp value SP1 in the linear way.
• Ramp function is active only after the controller is turned on and it is ended by reaching stp value SP1.
• When ramp function is active, on lower display there is stp value SP1 and blinks rAMP .
• Ramp function is set in configuration level, menu SYS , parameter rAMP [ºC/hour].
• If parameter rAMP = oFF , ramp function is turned OFF.
Process value
Stp value
Keys for setting of
Stp value
Ramp by ramp function.
Ramp rate is set with
parameter rAMP .
Scale of ramp function is
[ºC/hour].
SP1 SP1
Ramp to stp value after the
power up. Ramp function is
turned OFF.
Ramp funct
ion is OFF
Ramp function is ON

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4 2 Automatic / manual operation of controller
Automatic operation of controlling requires the closed control loop. he user adjusts stp value and the controller regulates the
output power that is supplied to system.
At manual operation the user adjusts the required output power.
Manual operation
Manual operation is set by double pressing the key . It must be allowed by setting parameter FKEY = A-M . Parameter FKEY
is found in configuration level, menu SYS .
Important:
• When in manual operation the controller can not influence the output power that is set by a user. he behavior of the
system is then fully under users control.
• When in manual operation, Man blinks on lower display.
• he controller remains in the chosen mode of operation even after the power interruption.
• In manual operation the zero output power is set after the power interruption.
• In manual operation the output power is always set in % (0 to 100 for heating, -100 to 0 for cooling, -100 to 100 for
heating and cooling) and even in the case that the output is configured as the ON/OFF output.
4 3 Parameters of the control output, PID controlling
he controller Ht40B can be configured for ON/OFF as well as PID controlling and it enables:
• Heating controlling (the output 1).
• Cooling controlling (the output 2).
• Controlling of heating and cooling (the output 1 and 2).
he description of principals of controlling is found on page 16.
Heating, ON/OFF controlling
ON/OFF controlling of heating is set with the parameter ot1 = ht2 . Parameter ot1 is
found in configuration level, menu out1 .
In operation level you set hysteresis of ON/OFF controlling, parameter hYS1 .
Heating, PID controlling
PID controlling of heating is set with parameter ot1 = ht . Parameter ot1 is found
in configuration level, menu out1 .
In operation level you set PID parameters:
• Pb1A , It1A , dE1A , If only 1 set of PID parameters is used (parameter ALGo ).
• Pb1A , It1A , dE1A , Pb1b , It1b , dE1b , if both sets of PID parameters are used.
Cooling, ON/OFF controlling
You switch between automatic
and manual operation by double
pressing the key „F“
In
automatic operation
lower display shows stp
value.
In manual operation lower display shows the set
output power in %.
In
automatic opera
tion
you set stp value with the
arrow-keys.
In manual operation you set the output power in %
with the arrow-keys.
Process value is shown on
upper display
hYS1
SP1
SP1

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ON/OFF controlling of cooling is set with the parameter ot2 = CL2 . Parameter ot2
is found in configuration level, menu out2 .
S P value for cooling is put down by the value set with parameter SP2 , that is found
in configuration level, menu out2 .
In operation level you set hysteresis of ON/OFF controlling, parameter hYS2 .
Cooling, PID controlling
PID controlling of cooling is set with parameter ot2 = CL . Parameter ot2 is found in
configuration level, menu out2 .
S P value for cooling is put down by the value set with parameter SP2 , that is found
in configuration level, menu out2 .
In operation level you set PID parameters:
• Pb2A , It2A , dE2A , PID parameters defines the response of the controller.
4 4 Autotunning – automatic setting of PID parameters
he controller is fitted with the function that sets automatically PID parameters.
Autotunning of PID parameters can be started only when the controller maintains stp value SP (parameter
L-r = L )
Procedure of starting autotunning:
• Autotunning you can start with parameter Aut = ht (setting parameters for heating) or Aut = CL (setting parameters
for cooling). Parameter Aut you will find in operation level he control output must be set for PID controlling.
• he controller explores the characteristics of system from switching ON/OFF on the output and determines optimal PID
parameters. It can cause an overshoot.
• In the course of autotunning on lower display the information messages ( Aut1 , Aut2 , Aut3 ) blink.
• After the autotunning is finished the parameters are edited and the information messages stop blinking.
Important:
• Parameters Pb1A , It1A , dE1A , are set when 1 set of PID parameters is used ( ALGo = PId ) or the both sets of PID parameters
are used ( ALGo = 2PId ) and the actual set point value is lower than parameter SPId .
• Parameters Pb1b , It1b , dE1b , are set if the actual set point value is higher than parameter SPId when the both sets of PID
parameters are used ( ALGo = 2PId )
Parameters ALGo and SPId are found in configuration level, menu out1 .
Start of
autotunning
End of
autotunning
When in autotunning, on lower there are the following headings
blinking:
• Aut1 … the controller adjusts parameters Pb1A , It1A , dE1A
for heating.
• Aut2 … the controller adjusts parameters Pb1b , It1b , dE1b
for heating.
• Aut3 … the controller adjusts parameters Pb2A , It2A , dE2A
for cooling.
hYS2
SP1 + SP2
SP1 + SP2

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5 Operation level
In operation level you can set parameters which are available to a user.
From basic mode to operation level you will get by pressing the keys for 3 seconds. On lower display it appears LEVL ,
on upper display set oPEr and confirm with the key . If PASS appears on lower display the level is secured with the
password. In this case set the right password with the arrow-keys and confirm with the .
Menu of operation level
Display Meaning
PCn1 Shows the actual power of the output in %.
PCn2 Shows the actual power of the output 2 in %.
AoFF You can switch OFF permanent alarm by setting YES and confirming.
Aut
Starting / turning OFF of autotunning of PID parameters:
• oFF, turning OFF of autotunning of PID parameters.
• ht, starting of autotunning of PID parameters, heating.
• CL, starting of autotunning of PID parameters, cooling.
L-r
Selection for setting of stp value:
• L, stp value is local (it is set in the controller).
• M-S, remote setting of stp value via communication line, it is used for system Master-Slave.
• CSCD, remote setting of stp value via communication line, it is used for cascade controlling
dIF Difference of remote stp value for system Master-Slave.
Range: -499 to 499 °C.
CdLo Limit of low range for remote stp value for cascade controlling.
Range: -499 to CdhI °C.
CdhI Limit of high range for remote stp value for cascade controlling.
Range: CdLo to 2499 °C.
PCn1
P n2
L
-
r
dIF
CdLo
CdhI
AoFF
out1
no
E
Yes
Pb1A
It1A
dE1A
Pb1b
It1b
dE1b
hYS1
out2
no
Yes
out3
no
Yes
ALLo
ALhI
Pb2A
It2A
dE2A
hYS2
o2Lo
o2hI