Controlli W500H User manual

Rev. d 01/12 1 DMP052E
User’s manual
W500H/H4
W500HMB/HMB4
Temperature and humidity controller
CONTROLLI
16010 SANT’OLCESE Genova – Italy
Tel. [phone] Fax :[phone]
E-mail: [email protected]
Web: www.controlli.eu
ISO9000

Rev. d 01/1 2 DMP052E
TABLE OF CONTENTS
INTRODUCTION................................................................................................................................................3
USER INTERFACE ............................................................................................................................................4
FUNCTION DESCRIPTION ...............................................................................................................................5
GENERAL.......................................................................................................................................................5
FOR ANALOGUE OUTPUT 1 IT IS POSSIBLE TO SELECT: ...................................................................5
FOR THE 1 ON/OFF DIGITAL RELAY OUTPUT IT IS POSSIBLE TO SELECT: .....................................6
FOR ANALOGUE OUTPUT 2 IT IS POSSIBLE TO SELECT: ...................................................................6
FOR THE DIGITAL RELAY OUTPUT 2 IT IS POSSIBLE TO SELECT:....................................................8
CONTROL TYPE............................................................................................................................................9
SET-POINT COMPENSATION.................................................................................................................... 10
MIN/MAX HUMIDITY LIMITS ON A1 AND D1 LOOPS............................................................................... 11
OPERATING MODES.................................................................................................................................. 12
MANUAL OVERRIDE KEY FOR THE OPERATING MODE....................................................................... 12
CLOCK ENABLE WITH TIME SCHEDULE.................................................................................................13
OUTSIDE DIGITAL ENABLE....................................................................................................................... 13
FACTORY DATA LOAD .............................................................................................................................. 13
STORING DATA IN PERMANENT MEMORY ............................................................................................ 14
LOADING DATA FROM PERMANENT MEMORY...................................................................................... 14
REMOTE SET.............................................................................................................................................. 14
LINKBUS COMMUNICATION ..................................................................................................................... 14
ENTHALPY COMPARISON WITH OUTDOOR HUMIDITY SENSOR FROM ANOTHER W500H ............ 15
MODBUS COMMUNICATION..................................................................................................................... 16
USE OF SUPERVISION OUTSIDE SENSOR FOR COMPENSATION...................................................... 16
ERROR SIGNALLING.................................................................................................................................. 16
FRONT PANEL AND DATA ACCESS MENU................................................................................................. 17
PARAMETER CONFIGURATION MENU....................................................................................................18
Parameters Loop PA1 - Mode A1............................................................................................................. 18
Parameters Loop PA1 - Mode A2............................................................................................................. 19
Parameters Loop PA1 - Mode A3 / Mode A4........................................................................................... 19
Parameters Loop Pd1 - Mode D1............................................................................................................. 20
Parameters loop Pd1- Mode D2............................................................................................................ 20
Parameters Loop Pd1- Mode D3 .......................................................................................................... 21
Sequence Parameters Pd1and Pd2- Mode D4................................................................................. 21
Parameters Loop PA2- Mode A1 .......................................................................................................... 21
Parameters Loop PA2- Mode A2 .......................................................................................................... 22
Parameter Loop PA2- Mode A4............................................................................................................ 22
Parameter Loop PA2- Mode A3............................................................................................................ 23
Parameter Loop Pd2 - Mode A1........................................................................................................... 23
Parameter Loop Pd2 - Mode A2........................................................................................................... 24
Parameter Loop Pd2 - Mode A3........................................................................................................... 24
PROGRAMME MENU FOR OPERATING MODES AND TIME SCHEDULES........................................... 25
Setting - Analogue output 1 / 0-10Volt PA1 Loop............................................................................ 26
Setting - Analogue output 2 / 0-10Volt PA2L o o p .............................................................................. 27
Setting - Relay Digital output 1 Loop Pd1 ............................................................................................. 27
Setting - Relay Digital output 1 Loop Pd1 ............................................................................................. 28
Setting - Relay digital output 2 Pd2 – 1, 2 and 3 operating mode ........................................................ 28
Setting - Relay digital output Pd1and Pd2 – 4 operating mode......................................................... 29
MENU DIAGRAM......................................................................................................................................... 30
TEMPERATURE CONTROL PARAMETER TABLES (LEVEL 1)................................................................... 31
HUMIDITY CONTROL PARAMETER TABLES (LEVEL 1)............................................................................. 32
TABLES OF OPERATING MODES AND TIME SCHEDULES (LEVEL 2).................................................. 33
SYSTEM APPLICATIONS............................................................................................................................... 35

Rev. d 01/1 3 DMP052E
INTRODUCTION
The temperature and relative humidity controller for AHU is provided with four control loops, two
analogue with 0-10Vdc output loops and two on/off hysteresis with relay output loops with
exchange contact.
All loops have independent control parameters and set points.
All the four loops share the three sensors (control, compensation and limit) coming from:
- ST temperature control sensor
- SC compensation sensor
- Relative humidity sensor, SH limit and/or compensation
The controller is also provided with two digital dry-contact inputs which can be used for outside
enable or summer/winter changeover functions.
Each loop can control its own output independently from the other using four different operating
modes.
The controller is characterized by a user interface composed of a 3 ½ digit FND display, of five
buttons and of twelve LEDs located on the front membrane.
Data on display depend on sensor presence and on enabling the various functions.
The controller is also provided with a two-wire local bus called “LinkBus”
Through the local bus port it is possible to connect up to 4 different devices with other devices of
the same W digital series with the purpose to share the sensor and the operating mode.
The local bus also allows the W500H to be supervised if at least one W500TMB or W500HMB is
connected.
The W500HMB version differs from the basic W500H for its on-board RS485 ModBus
communication interface and for the real time clock with daily and weekly schedules.
The W500HMB allows supervision for itself and for the other W500H or W500T devices (max 3)
connected to it through a LinkBus and shares with them the set time schedules.
NOTE: A pressure sensor on the analogue loop 2 or digital loop 2 can be used in place of the humidity
sensor.
Electrical connections:
1 GND 13 230 Vac F (W500H/HMB)
or 24 Vac F (W500H4/HMB4)
2 SH 14 230 Vac N (W500H/HMB)
or 24 Vac N (W500H4/HMB4)
3 SC 15 Rel 1 CO
4 ST 16 Rel 1 NA
5 GND 17 Rel 1 NC
6 Di1 18 Rel 2 CO
7 Di2 19 Rel 2 NA
8 LinkBus + 20 Rel 2 NC
9 LinkBus -
10 Bus 485 + 22 Ao1
11 Bus 485 – W500HMB 23 GND
12 GND 485 ONLY 24 Ao2
Legend:
ST: PTC temperature control sensor
SC: PTC outside compensation sensor
SH: 0-10Vcc humidity control sensor
U1: User 1 (ex. Fan, circulation pump, on/off valve, etc.)
U2: User 2 (ex. on/off humidifier, on/off damper, etc.)
S1: 0 – 10 Volt proportional actuator
S2: 0 – 10 Volt proportional actuator

Rev. d 01/1 4 DMP052E
USER INTERFACE
The device is characterized by a user interface
composed of a 3 ½-digit FND display, five keys and
twelve LEDs located on the front membrane. The
information displayed on screen depends on whether
the sensors are present or not and on the related
function enable. Using the buttons it is possible to
navigate a cascade menu, which allows configuring
individually the functions to be assigned to the 4
independent outputs.
Description of keys
Button Up to increase values.
Used both for parameter modification and for moving inside the menus.
Button Down to decrease values.
Used both for parameter modification and for moving inside the menus.
Cancel and menu exit
Parameter programming and confirmation
Operating mode override
Led description
Ao1 Led associated to analogue output 1, it is on during data display.
Ao2 Led associated to analogue output 2, it is on during data display.
ST Led associated to temperature control sensor value.
SC Led associated to compensation sensor value.
SH Led associated to humidity sensor value.
DI1 Led associated to digital input 1, it is on when the input is active (closed contact).
DI2 Led associated to digital input 2, it is on when the input is active (closed contact).
Rel1 Led associated to relay output 1, it is on when the output is active.
Rel2 Led associated to relay output 2, it is on when the output is active.
@Led associated to anomaly signal.
Ovr Led associated to override status of Operating mode
Mode Led associated to Operating mode.
On Comfort
Blinking Reduced
Off Stop

Rev. d 01/1 5 DMP052E
FUNCTION DESCRIPTION
GENERAL
First of all it is necessary to establish the operating mode for each control loop.
The operating mode is the function to be assigned to a specific output. The output of each loop
depends on the sensor which carries out control.
For the A1 and D1 loops it is possible to set temperature sensor ST, whilst for A2 and D2 loops it is
possible to set either relative humidity sensor or enthalpy sensor (temperature only or both
temperature and humidity; in the latter case two controllers are needed).
A1 and D1 loops control temperature sensor ST for Ao1 and Rel1 outputs.
Heating control means that the output moves in an inversely proportional way with respect to the
value measured by the temperature sensor, vice versa is the meaning of cooling control.
Operating modes are:
FOR ANALOGUE OUTPUT 1 IT IS POSSIBLE TO SELECT:
MODE A1: HEATING LOOP
If the output value has to increase when the control sensor
value drops under the operating set.
When the set point is achieved the output is zero.
If the control temperature drops under the SPC Heating Set
Point minus BPC Heating Proportional Band the relevant
analogue output goes to 100% equivalent to 10 Vdc.
MODE A2: COOLING LOOP
If the output value has to increase when the control sensor
value exceeds the operating set.
When the set-point is achieved the output is zero.
If the control temperature goes above the SPF Cooling Set
point plus BPF Cooling Proportional Band the relevant
analogue output goes to 100% equivalent to 10 Vdc.
MODE A3: HEATING / COOLING LOOP FROM S/W
CHANGEOVER
If the Heating or Cooling Loop is enabled through the
contact input (D.i.2) in order to carry out a season
changeover. When the D.i.2 contact is open, the Loop
passes to “Heating” control type; under closed contact
the Loop passes to “Cooling” control type. The two
“Set” (SPC, SPF) and the two proportional bands (BPC,
BPF) are independent.
MODE A4: HEATING LOOP / COOLING IN SEQUENCE
If it is required to exploit the 0-5 6-10 V control characteristic of
CONTROLLI actuators to realize a Heating Cooling sequence
with a unique 0–10 Vdc analogue output. When the set point is
achieved the output is 5,5 Vdc. If the control Temperature goes
below the Heating Set Point value (SPC) minus Heating
Proportional Band (BPC), the relevant analogue output goes to
0 Vdc. If the control Temperature goes above the value the
Cooling Set Point value (SPF) plus Cooling Proportional Band
(BPF) the relevant analogue output goes to 10 Vdc.
In this case, if a heating-Cooling sequence is required, the two actuators must be connected in
parallel to the same output selecting the range 0 – 5 Vdc with reverse action for the actuator, which
manages the heating channel, while for the actuator managing the Cooling channel, it is necessary
to select the range 6 – 10 Vdc with direct action.

Rev. d 01/1 6 DMP052E
FOR THE 1 ON/OFF DIGITAL RELAY OUTPUT IT IS POSSIBLE TO SELECT:
MODE D1: ON/OFF HEATING HYSTERESIS
If the output value must turn to ON when the value of the Control
Sensor goes below the Operating Set minus the Hysteresis
band.
When the set point is achieved, the relay output is OFF.
MODE D2: ON/OFF COOLING HYSTERESIS
If the output value must turn to ON when the control sensor
value goes above the Operating Set plus the Hysteresis band.
When the Set Point is achieved, the relay output is OFF.
MODE D3: HEATING/COOLING HYSTERESIS FROM S/W
CHANGEOVER
If it is required to enable the heating or cooling hysteresis
through the contact input (D.i.2) to carry out a season
changeover. When the D.i.2 contact is open, the Loop passes to
“Heating” control type; under closed contact the Loop passes to
“Cooling” control type.
The two “Set” (SPC, SPF) and the two proportional bands (BPC,
BPF) are independent.
MODE D4: ON/OFF DELAY
If it is required to enable or disable a relay output with a
specified delay at stop and/or start.
The delay is considered with respect to an event, which
can be:
- Operating Mode (NM and RF => ON, FA => OFF), if a
stop and/or start delay of a device following the
Operating Mode is required.
- The status of one of the two digital inputs (D.i.1 or
D.i.2), if it is required a stop and/or start delay of a device following the status of one or both dry
contact inputs.
- The status of the other Relay output, if it is required a stop and/or start delay of a device
following the status of the other digital relay output.
The ON Delay (RA) and the Off Delay (RS) can be set individually in seconds.
The events generating the changeover are according to an “OR” logic, which means that, if more
than one event condition is enabled, it is sufficient that only one is true.
The maximum allowed delay is 30 minutes.
A2 and D2 loops control, for the Ao2 and Rel2 outputs, the SH humidity sensor only through the
operating modes A1, A2 and A4, whilst in the operating mode A3 they control enthalpy only in
temperature or complete enthalpy (temperature and humidity) if the outdoor humidity signal
through LinkBus is supplied (see page 15).
FOR ANALOGUE OUTPUT 2 IT IS POSSIBLE TO SELECT:
Mode A1: HUMIDITY LOOP
If the output value must increase when the SH Humidity Sensor
value drops under the set point. When the set point is achieved, the
output is zero. If the SH Humidity Sensor value drops under the SPH
Humidity Set point minus BPH Humidity Proportional Band, the
relevant analogue output goes to 100% equivalent to 10Vdc.

Rev. d 01/1 7 DMP052E
MODE A2 DEHUMIDIFICATION LOOP
If the output value must increase when the SH Humidity Sensor value goes above the operating
set. When the set point is achieved the output is zero.
If the SH Humidity Sensor value exceeds the SPD Dehumidification Set Point value plus BPD
Dehumidification Proportional Band, the relevant analogue output goes to 100% equivalent to
10Vdc.
MODE A3 ENTHALPY CONTROL WITH SUMMER/WINTER CHANGEOVER SET
It enables the Enthalpy Control with summer/winter changeover set point through (D.i.2) contact.
By D.i.2 open contact, the loop goes in Enthalpy control with winter set-point, by closed contact,
loop goes in Enthalpy control with summer set-point.
The two sets (STI) winter and (STE) summer are independent.
The (BEI) internal and (BEE) external proportional bands are always the same both in winter and in
summer, as well as the (LLA) minimum opening limit value.
By outdoor Humidity signal it is necessary to set also SHI and SHE winter and summer humidity
set points and (bPH) humidity band.
The comparison between internal and external enthalpy must last for at least a time exceeding 15
min. to avoid output hunting when the enthalpy values are almost the same.
MODE A4: HUMIDIFICATION/DEHUMIDIFICATION
SEQUENCE LOOP
To be selected when it is required to exploit the 0-5, 6-10
control characteristics of Controlli actuators to perform a
humidification/dehumidification sequence with a unique 0-10
Vdc output, driving in sequence proportional humidifier and
cooling valve.
When the set point value is achieved, the output is 5.5 Vdc
When the control humidity drops under the (SPH) humidity set
point minus (BPH) Humidity Proportional Band, the relevant
analogue output is 0 Vdc.
When the control humidity exceeds the (SPD) Dehumidification Set Point value plus (BPD)
Dehumidification Proportional Band, the relevant analogue output is 10 Vdc.
The two actuators must be connected in parallel to the same output setting the range 0-5Vdc with
reverse action for the actuator which drives the proportional humidifying channel, whilst for the
actuator which drives the cooling channel it is necessary to select the range 6-10Vdc with direct
action.

Rev. d 01/1 8 DMP052E
FOR THE DIGITAL RELAY OUTPUT 2 IT IS POSSIBLE TO SELECT:
MODE D1: ON/OFF HUMIDIFICATION HYSTERESIS
If the output value must turn to ON when the value of HHumidity Sensor drops under (SPH)
operating humidity set value minus (BPH) hysteresis band.
When the set point is achieved the relay output is OFF.
MODE D2: ON/OFF DEHUMIDIFICATION HYSTERESIS
If the output value must turn to ON when the value of H
Humidity Sensor exceeds the SPD operating dehumidification
set point plus (BPD) hysteresis band.
When the set point is achieved the relay output is in OFF status.
MODE D3: ENTHALPY HYSTERESIS WITH S/W
CHANGEOVER SET
If the enthalpy control with S/W changeover set through (D.i.2) contact input is required.
By D.i.2 open contact, the loop goes to enthalpy control with winter set-point; by closed contact the
loop goes to enthalpy control with summer set-point.
The two sets STI winter and STE summer are independent.
The (BEI) internal and (BEE) external proportional bands are always the same both in winter and in
summer.
By outdoor humidity signal it is necessary to set also SHI and SHE winter and summer humidity set
points and (bPH) humidity band.
The comparison between internal and external enthalpy must last for at least 15 min. to avoid
output hunting when enthalpy values are almost the same.
MODE D4: ON/OFF DELAY
If it is required to enable or disable a relay output with a specified stop and/or start delay.
The operation is the same as described for mode D4 of the Relay 1 digital output (see page 6).

Rev. d 01/1 9 DMP052E
CONTROL TYPE
Once the OPERATING MODE is stated, it is necessary to set the CONTROL TYPE, i.e. the control
criteria used by the OPERATING MODE. The control type can be:
- Proportional or Proportional + Integral (P or P+I)
- With fixed operation set point or compensated in function of Compensation Sensor.
- With or without minimum and/or maximum limit in function of Limit Sensor.
PROPORTIONAL CONTROL (P)
Given a SET POINT (required value), the difference between this value and the VALUE detected
by the Control Sensor is called ERROR.
A proportional control is obtained when the value of a controller output moves proportionally to the
ERROR. The PROPORTIONAL BAND determines the quantity of the action (gain) in function of
ERROR. When the ERROR is equal to the PROPORTIONAL BAND the output value is equal to
100 %.
Setting a too small PROPORTIONAL BAND can generate oscillation phenomena of the output.
Setting an excessively wide PROPORTIONAL BAND can generate a change from the SET of the
controlled temperature.
PROPORTIONAL CONTROL + INTEGRAL (P+I)
If an I action is added to P action, the result is a more accurate control, which takes into account
the error variation in time. It is necessary to define an INTEGRATION TIME, which states the time,
after which the Proportional action is restored. Generally, INTEGRAL action is necessary when the
PROPORTIONAL BAND allows a variation, conferring to the INTEGRAL action the task to cancel
the remaining error.
The two 0-10 Vdc analogue outputs can be P or P+I, therefore, the parameters to be set for each
output will be:
- SET POINT (with fixed-point control)
- PROPORTIONAL BAND
- INTEGRATION TIME (if I action is enabled)
For analogue output 2 in A3 operation mode (enthalpy control with s/w changeover set), control
can be proportional only, and not P+I.
The 2 relay outputs can be only P, the parameters to be set will be:
- SET POINT (with fixed-point control)
- HYSTERESIS BAND
For the analogue output 1 and the relay output 1 it is used the temperature sensor connected to ST
terminal if not otherwise specified (“sharing sensors” see paragraph concerning LinkBus).
If the temperature sensor is not connected correctly to ST terminal or is not shared correctly with
other devices Led @ is lighted.
For the analogue output 2 and the relay output 2 it is used the humidity sensor connected to SH
terminal if not otherwise specified (“sharing sensors” see paragraph concerning LinkBus)
If the humidity sensor is not correctly connected to SH terminal or is not shared correctly with other
devices, LED @ is lighted.
If necessary it is possible to connect the SH terminal to another sensor (air quality, temperature or
another 0-10Vdc signal transmitter) the signal value shall anyway be expressed as a percentage
with respect to the range end.
In the operating MODE D4 the relay output behaves as a timed sequencer and it controls
depending on time events and not on temperature/humidity values.
See page 21 to set the Operating Modes and control types.

Rev. d 01/1 10 DMP052E
SET-POINT COMPENSATION
The operation SET-POINT can be fixed or determined by a compensation slope according to the
value given by the compensation sensor.
Both A1 and D1 temperature loops can be temperature
compensated (the SC sensor is necessary) or humidity
compensated (SH sensor). It is necessary to set the Cth
parameter to state the temperature and humidity
compensation. Both A2 and D2 humidity loops can be
temperature compensated only (the SC sensor is
necessary).
The compensation slope is a broken line touching two
points and given by four values.
Depending on the value given by the sensor, a set-point value shall be defined in a range between
a minimum and a maximum.
“Negative Compensation” means when the operating set-point increases while the compensation
sensor value decreases.
“Positive Compensation” means when operating set-point
increases by the increasing of compensation sensor
value.
It is possible to set Negative and Positive Compensations
both for temperature and humidity control loops.
Each operation set-point value, both by temperature
(heating and/or cooling) and by humidity
(humidification/dehumidification) control loop can be
associated to a relevant slope resulting by two values:
- SET-POINT 1 corresponding to TEMPERATURE 1
- SET-POINT 2 corresponding to TEMPERATURE 2
If the Compensation Sensor is present and the Compensation of an Operating Mode is enabled, it
is necessary to determine the four values of the curve. Such values become eight in case of
Operating Mode A3, A4 and D3 because it is necessary to set compensation both for the heating
and for the cooling loops. In the latter case, if compensation should be disabled for one of the two
Loops only, it is necessary to set the minimum Set-point equal to the maximum value achieving a
fixed operation Set-point. It is not possible to enable compensation in Operating Mode D4.
While the A2 and D2 loops can be compensated through the SC temperature sensor, loops A1 and
D1 may be temperature or humidity compensated. The selection is made under the Level II menu
(label Cth).
For the temperature compensation the Compensation Sensor used is the one connected to SC
input, if not differently specified (“SC sharing” see paragraph related to LinkBus). To enable
Compensation first connect or share the Compensation Sensor. If compensation is enabled on any
Operating Mode and the Compensation Sensor is not connected correctly to SC terminal or is not
shared correctly with other devices, the Anomaly led @lights up and the control Set-point
becomes the value set for fixed point, i.e. without Compensation.
For humidity compensation the possible absence of SH sensor does not generate any fault since
its value can be 0.
By humidity control loops, the possibility to compensate the set point depending on SC signal is
used either to perform the remote setting of humidity set point through a potentiometer (see remote
set page 14) or e.g. to compensate linearly minus the room humidity set according to the inner
temperature of glass surface (anti-frost function in swimming pools or wet environments).
In this case, the temperature sensor connected to SC must be located in the indoor part of the
glass wall.
For all compensation parameters settings see page 18

Rev. d 01/1 11 DMP052E
MIN/MAX HUMIDITY LIMITS ON A1 AND D1 LOOPS
Limit loops are optionally active in A1 and D1 loops only; they are P-type and always operate with
fixed set-point. If enabled, they work in parallel to the control loop. For each operating mode
(except Mode D4) both minimum and maximum limits can be enabled separately.
For each control loop different settings are
available:
- Limits disabled
- Active minimum limit for heating
- Active maximum limit for cooling
The behaviour of a limit loop output will be
different if the loop is in heating or cooling
mode.
For A3, A4 and D3 operating modes, it is
possible to enable the minimum limit for
heating and/or the maximum limit for
cooling.
The term “minimum humidity limit” indicates
a function intended to avoid that the
humidity detected by the SH limit sensor
drops under given values.
The term “maximum humidity limit” indicates
a function intended to avoid that the
humidity detected by the SH limit sensor
exceeds given values.
In a HEATING LOOP:
If the Minimum Humidity limit function is
enabled, it uses the output maximum value
among the limit Loop and Control Loop. A greater heat supply allows a better operation of the
humidification device, avoiding the risk of condensation and improving the plant efficiency. If the
Minimum limit is enabled, it is necessary to define:
- MINIMUM LIMIT SET POINT
- MINIMUM LIMIT PROPORTIONAL BAND
In a COOLING LOOP:
If the Maximum Humidity limit function is enabled, it uses the output maximum value among the
limit Loop and Control Loop. A higher cooling in the air duct allows reducing the humidity supplied
to the environment. If the Maximum limit is enabled it is necessary to define:
- MAXIMUM LIMIT SET POINT
- MAXIMUM LIMIT PROPORTIONAL BAND
It is not possible to enable the Limit function in operating mode D4. The Limit Loop set point
operates at fixed point and is not modified neither in Reduced mode. The Limit Loops are disabled
under Stop Operating Mode. The Limit sensor used by the loops A1 and D1 is the one connected
to the SH Humidity sensor input, if not differently specified (“SH sharing” see paragraph related to
LinkBus). If the Limit is enabled on any Operating Mode and the Limit Sensor is not connected
correctly to SH terminal or is not shared correctly with other devices, the Anomaly Led @switches
on, the control loops A1 and/or D1 are stopped and the relevant Ao1/Rel1 output switched off.
For all limit parameters settings see page 18.

Rev. d 01/1 12 DMP052E
OPERATING MODES
The equipment is able to operate according to three different operating modes, which are:
0) Comfort – all loops are ON during control (including the Limit Loops).
1) Reduced – the Control Loops operate on a reduced Set point. The Limit Loops remain ON with
their set point.
2) Stop – all loops are 0 (including the Limit Loops).
The Operating Mode acts in parallel on all Control Loops also in Mode D4 (sequence controller), in
which Comfort and Reduced modes have the same meaning.
The passage from an Operating Mode to another can take place as follows:
- Using the appropriate Manual override key Ovr -. If it is pressed repeatedly, it is possible to
access manually to one of the three modes. This function is active in each Control Loop, by setting
ABO = On. For further details see page 11.
- From Time schedule: it changes automatically into one of the three modes. This function is
enabled on each Control Loop, by setting ABO = On.
- Through digital input D.i.1 and/or D.i.2 (except modes A3 and D3); if enabled (AE1 = On and/or
AE2 = On), it is possible to pass from Stop (open contact) to another mode, i.e.:
Changeover from digital inputs with dry contact operates on all Loops whose function is enabled
(AE1 or AE2 with value On). Such operation has a priority with respect to other changeovers (from
clock or Manual override button). The enabled Operating Mode is signalled by a proper Led Mode
on the front panel, as follows:
Through the LinkBus it is possible to share the override mode, although a local override on the
single device has always priority with respect to the shared mode.
The Stop mode in Mode A4 produces a 5,5 Vdc output.
The default operating mode is determined by the Time Schedule if the clock is present, otherwise
the default mode is Comfort. The manual override key is disabled if the device is switched of and
on again. For further detail see the three following paragraphs.
MANUAL OVERRIDE KEY FOR THE OPERATING MODE
It is possible to carry out a manual override of the Operating Mode by pushing the proper key Ovr-
inside the Operating Mode Programme Menu accessed by holding the Set key down for 5
seconds. The manual override cancels the mode determined by the clock and it is signalled by the
Led Ovr on the front panel. The number of clicks on such key, states cyclically the setting, passing
from Comfort, to Reduced and Stop modes, then returning to Automatic mode.

Rev. d 01/1 13 DMP052E
CLOCK ENABLE WITH TIME SCHEDULE
If the W500 is RTC-provided or it is connected via LinkBus to a device with clock, it is possible to
define the Operating Mode according to a weekly schedule and a daily schedule. The clock enable
of each Control Loop is obtained by setting the parameter ABO = On. If the device with clock is
connected via LinkBus to other equipments without clock, the mode can be shared and all the
equipments will follow simultaneously the same time schedule.
Weekly schedule:
For each day of the week it is possible to define either a fixed mode (On = Comfort, rid = Reduced,
OFF = Stop) or a complete daily schedule (expressed by the Pr1 value), or only the first two (Pr2
value), or only the last two (Pr3 value) changeovers of the daily schedule.
Daily schedule:
It is possible to carry out up to 4 time changeovers defining, for each one, hour, minute and mode.
Unused changeovers must be filled in with the same values of the last valid changeover.
For the setting of both weekly and daily time schedules, see page 25.
OUTSIDE DIGITAL ENABLE
Two digital inputs are available: they can be used independently by the 4 Control Loops to override
the active operating mode. It is necessary to make a distinction between HMB model (with clock)
and H model (without clock).
In both models, if parameter Abo = OFF (enabling by clock disabled) the Loop is STOPPED; if
parameter Abo = ON it follows the time schedules in HMB model and it is always in Comfort mode
in H model.
At this point, if on a Control Loop the Outside enable is started with parameter AE1= ON and/or
parameter AE2 = ON:
In HMB model
the D.I. 1 and/or D.I.2 contacts enable the Loop outside the time schedules
In H model
nothing happens (the loop is always in COMFORT mode)
If parameter Abo = OFF and parameters AE1= ON and/or parameters AE2= ON, the D.I. 1 and/or
D.I. 2 contacts are open the Loop is STOPPED, if one or both of them are closed the Loop is in
COMFORT mode.
If the Loop is configured to operate in A3 or D3 mode (Heating/Cooling by S/W changeover) the
digital input 2 is only used for this purpose.
The enabling from contact (Loop starting override) has priority with respect to the other
changeovers (from clock or manual override with Ovr -key).
Contact D.i.1
AE1 = On Contact D.i.2 (*)
AE2 = On
Operating mode
enabled Open Closed Open Closed
COMFORT STOP COMFORT STOP COMFORT
REDUCED STOP REDUCED STOP REDUCED
STOP STOP COMFORT STOP COMFORT
(*) Function not active in A3 and D3 modes
FACTORY DATA LOAD
Through this function it is possible, if required, to reset all the factory settings and parameters.
This function is useful for example when the user has set different values and requires restoring
the initial conditions in a short time.

Rev. d 01/1 14 DMP052E
STORING DATA IN PERMANENT MEMORY
Once the parameters for a plant are set, it is possible to store such customization in order to
restore them when required.
LOADING DATA FROM PERMANENT MEMORY
This function allows restoring all the configurations and parameters, which were previously saved
by the, MEMORY DATA STORAGE function.
REMOTE SET
When a control with Fixed-point set is required, the Compensation Sensor is not used.
In this case, it is possible to connect a suitable potentiometer (instead of the Compensation
Sensor local input) to carry out a remote setting of the Operation Set-point.
PARAMETER SETTING
Enable Compensation and define the four points of the line:
Keep into consideration that TEMPERATURE 1 corresponds to the value read at one
potentiometer end and TEMPERATURE 2 to the value read at the other end.
•SET 1 corresponding to TEMP 1
•SET 2 corresponding to TEMP 2
The value displayed by the Compensation Sensor is purely indicative and does not correspond to
the actual temperature in °C.
LINKBUS COMMUNICATION
The LinkBus serial communication port allows to 2, 3 or 4 equipments to interoperate for data
exchange. The LinkBus connection allows sharing the three sensors and Operating Mode and
supervising the devices, which do not have the RS485 serial communication port.
The equipment connected via LinkBus must have a univocal address (IDL) that can be set by the
menus from 1 to 4. The equipment with idL = 1 (Master) communicates its Operating Mode to
the other controllers connected via LinkBus. If the Master is RTC-provided (RTC is not necessary
for the others), the 4 controllers can operate according to the same time schedule. The equipment
without the RS485 serial communication port (W500T or W500H) can be supervised if connected
via LinkBus to at least one equipment with RS485 (W500TMB or W500HMB), setting it as Master
(i.e. idL = 1).
Each IDL address corresponds to a LinkBus “channel” on which the controller communicates the
values of its own temperature sensors connected to the terminals. Each device communicates its
values on the LinkBus channel determined by the assigned IDL address number. If it is required a
sensor connected to the terminals of another controller, it is necessary to operate on parameters
menu of Sensor Selection (SEL) and to select the channel for reading. For example, a controller
with idL address = 2, which uses the Compensation Sensor connected to SC terminals of the
equipment having idL address = 3, the value SSc in the sensor selection parameter menu
(SEL) must be = 3. If the sensor to be used is connected to the controller terminals, the setting will
be SSc = 2. For each one of three sensors it is necessary to specify its location, if the sensor is
local, it is necessary to state the proper IDL address.
It is necessary to set the (NDL) Link number to transmit their values through the LinkBus channel;
NDL is the number of the equipment connected through the same LinkBus (max 4). The equipment
connected to LinkBus, which must not transmit their data, can be set with ndL = 1, this
configuration is allowed (to speed up the transmission of data on LinkBus), but it is not advisable
when supervision data via ModBus is requested. The equipment connected to LinkBus which do
not transmit their data can anyway receive data from other equipment connected via LinkBus.

Rev. d 01/1 15 DMP052E
It is important that all equipment connected to LinkBus, which must transmit their data, have the
same NDL value. For example, if only three equipment on four must transmit data, three shall have
ndL = 3 and one ndL = 1. The equipment which must not transmit data, but only receive,
must have idl address higher than the equipment which transmits.
For example: if only three equipments on four must transmit data, three shall have idL = 1, 2, 3
and one idL = 4. A low ndl value increases data update which occurs in a minimum time of 40
sec. with 10 sec. for each transmitting controller. The advisable max distance between to extreme
equipment of LinkBus is 10 m. Such distance should allow any connection inside an electrical
switchboard. It is strongly recommended the use of shielded cables with earth screen at one end
only, if power equipment (contactors, inverters, UPS, reactors, etc.) is present. It is essential to
keep adequate distance (30 cm. at least), between cable and wires, otherwise use metal tracks. It
is recommended the use of 24 AWG or 26 AWG twisted pair and do not carry out star connections.
The default values of the Bus menu are idL = 1 and ndL = 1. For LinkBus address setting
and sensor selection see page 20.
ENTHALPY COMPARISON WITH OUTDOOR HUMIDITY SENSOR FROM ANOTHER
W500H
When the function Enthalpy Comparison is active (mode A3 for analogue output 2 and/or D3 for
relay output 2) it is possible to utilize SH signal from another W500H as outdoor humidity sensor.
In this case we achieve a complete Enthalpy comparison of temperature and humidity using the
outdoor humidity value sent through the LinkBus by another W500H. Practically, each W500H
copies its SH signal value on the SSE channel (outdoor sensor signal) to share it with other
W500H. E.g. if a controller with address idL= 1 requires to use as outdoor humidity sensor the
one connected to another controller with address idL= 2, it must set the reading value of the
external channel as SSE= 2
To perform the complete enthalpy comparison it is necessary the presence of both humidity
sensors (indoor and outdoor) with an SSE value different from SSH. When the enthalpy is
complete, it enables all Set Point and the Bands are processed by the following formula:
Enthalpy= H x 10 (0,0275xT-1) +T
Attention: parameter USE = ON disables outdoor humidity processing (see page 17).

Rev. d 01/1 16 DMP052E
MODBUS COMMUNICATION
Through the ModBus protocol it is possible to supervise up to 255 groups of 4 equipments, for a
total of 1020 devices. The ModBus connection is carried out on the equipment with IDL = 1
(Master) through the RS485 serial port. The values managed by supervision and those managed
by the controller menu are the same. The Bus Supervision address IBS (ModBus address) of the
single device must be set manually on the configuration menu. The default ModBus address is
ibS = 1. The devices connected via LinkBus must have the same ModBus address of the
Master. For ModBus data address see the relevant Database documents supplied on demand.
The wiring path between the two most distant devices connected to RS485 serial must not exceed
1000 m.: we recommend to use a 24AWG or 26AWG twisted-pair cable and not to carry out star
connections.
The first and the last device must be terminated by a 120-Ohm ¼-Watt resistance.
If devices from different manufacturers are present on the same communication Bus, it is
necessary to respect the limits imposed and to be careful not to use the same ModBus addresses
of other devices. We recommend using a shielded cable for RS485 Bus if on the plant or inside the
switchboard are present power devices, always keeping the suitable distances and precautions
regarding signal wiring and power cables.
For ModBus address set up and outside compensation from supervision, see page 21.
USE OF SUPERVISION OUTSIDE SENSOR FOR COMPENSATION
If outdoor sensor on (USE=ON) is enabled, it is possible to perform compensation through a value
sent by communication bus (supervision). Practically it is a virtual sensor which can be used
instead of a physical sensor connected to SC terminals.
If, for example, on the whole plant there is only one sensor outside the building, this function allows
using its value on all controllers connected to the supervision. Likewise from supervision it is
possible to set a unique set point to the various devices connected.
Attention: parameter USE = ON disables SH humidity sensor on SSE channel (see page 15).
For outside compensation setup from supervision, see page 21.
ERROR SIGNALLING
The controller is able to signal two anomaly conditions, one depending from communication and
the other from Sensors. If a Communication ERROR is present, the Anomaly Led @blinks. It is
possible to have a communication fault when, for example, two equipments connected via LinkBus
use the same IDL address or in case of high noise on communication, which provokes faulty data
transmission. Inside switchboards, in presence of power devices (contactors, Inverters, UPS,
reactors, etc.), we recommend to use shielded cables (both for sensors and Bus) to reduce
anomaly probability.
If a sensor anomaly occurs, the Anomaly Led @lights up. If both anomaly conditions occur, the
Led blinks. Once the Communication anomaly is cancelled, the Led remains on indicating the
Sensor ERROR.
For a correct operation the anomaly Led must be switched off.
The conditions, which most frequently produce anomalies, are:
- Sensor is no more present with enabled function
- Sensor outside the controller (shared with LinkBus) is not present
- Multiple devices have the same IDL address

Rev. d 01/1 17 DMP052E
FRONT PANEL AND DATA ACCESS MENU
Using Front Panel, it is possible to access the Parameters
managed by the device. The data access Menu is subdivided
into three different levels:
Level 0 – Main data display
Level 1 – Access to parameter configuration menu
Level 2 – Access to the Operating modes programme menu
Level 0 is the one displayed by default. If no keys are
pushed for some seconds this level is automatically re-
entered from the higher levels.
At this Menu level it is possible to visualize on the FND display the temperature values of the
connected sensors (also via LinkBus) and the values of analogue outputs Ao1 and Ao2 expressed
as a percentage. Data display is achieved by pushing the buttons Up or Down ; while Led
signalling the displayed analogue input or output lights up. If an input is not present, it is not
displayed. The digital input led D.i.1 and D.i.2 are on with closed contact, the Rel1 and Rel2 relay
output leds are on if they are energized. Such leds are always visible at any menu level. The
Mode, Ovr and anomaly @LEDs have already been described in the respective chapters.
To access Level 1, push the Set key. At this level it is possible to change the control Parameters of
the two analogue outputs [PA1] and [PA2], of the two Relay Digital outputs [Pd1] and
[Pd2] and, for W500HMB controllers only, also the clock [ rtc]. It is always necessary to set
the clock at the first start-up or if the equipment has been powered off for over 30 hours. In order to
set date and time, scroll the menu at the level 1 until the corresponding label [ rtc] is reached.
The label [ d00 ] (days, d00 = Monday) appears by pushing the Set key. Push the buttons Up or
Down to set. If the keys are not pushed for some seconds or by pressing Set, the label [ h00]
(hours) and [ ’00 ] (minutes) appears: push the buttons Up and Down to set respectively hour
and minutes. To confirm and save, push Set. If the keypad is not pushed or by pressing the Esc
key once, the start value appears.
[ PA1] label corresponds to the Parameters of Analogue output 1 at Ao1 terminal
[ PA2] label corresponds to the Parameters of Analogue output 2 at Ao2 terminal
[ Pd1]label corresponds to the Parameters of Digital output 1 of Rel1 relay
[ Pd2] label corresponds to the Parameters of Digital output 2 of Rel2 relay
To modify a parameter, it is necessary to push Set after selecting the corresponding Label; the
parameter value blinks and can be modified by pushing the keys Up to increase or Down to
decrease. Push Set or Esc to exit. For the complete control parameter navigation see the
Parameter Configuration Menu scheme from page 18.
By pushing the Set key for at least 10 seconds, Level 2 appears. At this menu level, it is possible
to set:
- the Operating-Set decrease in Reduced mode
- the operating modes of the two analogue outputs [PA1], [ PA2] and of the two relay outputs
[Pd1]and [Pd2]
- the address parameters for communication [ buS], for sensor selection [SEL], for data load
[LdE], to save [SdE], restore [dEF]and, for W500HMB devices only, also the time
schedules for the automatic changeover of the weekly and daily Operating Mode [ Pro].
For data navigation see Programme menu for operating mode and time schedules on page 21
Note: the time schedules are present only on W500HMB.
53.9

Rev. d 01/1 18 DMP052E
PARAMETER CONFIGURATION MENU
Level 1 Parameter selection Parameter modification
Parameters Loop PA1 - Mode A1
Push the Set Key and choose the parameter, then push Set again to modify it. The parameter
value blinks showing the edit status: push the Up and Down keys to change values. Once the
desired values are modified, push the Set or Esc keys to exit.
Set
Set
Set
Set
Set
Set
Set
Set
Set
Set
Set day
Set time
Set minute
PA1
PA2
Pd1
Pd2
rtc
d00
h00
‘00
Parameters
Parameters
Parameters
Parameters
Heatin
g
o
p
eratin
g
Set-
p
oint
(
read-onl
y
if the com
p
ensation is ON
)
Minimum Set-
p
oint of Heatin
g
com
p
ensation
Minimum Tem
p
erature/Humidit
y
of Heatin
g
Com
p
ensation
SoC
Sc1
c1
Max Set
p
oint of Heatin
g
Com
p
ensation
Max tem
p
erature/Humidit
y
of heatin
g
Com
p
ensation
Heatin
g
Pro
p
ortional
Band
Sc2
c2
bPC
Heatin
g
Inte
g
ral
time
tiC
Minimum Humidit
y
Set
p
oint
Minimum Humidit
y
p
ro
p
ortional band
SHC
bHC
Visible onl
y
with Com
p
ensation On
( coP = ON
) settin
g
Visible only with Integral ON (int parameter = On )
Visible only with Minimum humidity limit ON (LLH parameter = On )
Heating
temperature Set-point
StC
Visible onl
y
with Com
p
ensation Off ( coP = OFF
) settin
g

Rev. d 01/1 19 DMP052E
Parameters Loop PA1 - Mode A2
Push Set key to select the parameter to be modified. The parameter value blinks showing the edit
status: push the Up and Down keys to change values. Once the desired values are modified, push
the Set or Esc keys to exit.
Parameters Loop PA1 - Mode A3 / Mode A4
The parameter menu of the Analogue Operating Modes A3/A4 is the sum of A1/A2 Modes
parameter menus. This Menu contains all parameters, since these modes are intended to manage
both heating and cooling control loops.
Push Set key to select the parameter to be modified. The parameter value blinks showing the edit
status: push the Up and Down keys to change values. Once the desired values are modified, push
the Set or Esc keys to exit. The Compensation/Integral/Limit parameters are visible if the relevant
functions in the Operating Mode Programme menu (2nd Level) are enabled. Push Set key for 10
seconds to enter the menu.
Cooling operating Set-point (read-only)
Minimum Set-point of Cooling compensation
Minimum Temperature/Humidity of Cooling Compensation
SoF
Sc3
c3
Max Set point of Cooling Compensation
Max Temperature/Humidity of Cooling Compensation
Cooling Proportional Band
Sc4
c4
bPF
Cooling Integral time
tiF
Maximum Humidity Limit Set point
Maximum humidity limit Proportional band
SHF
bHF
Visible only with Compensation On ( coP = ON ) setting
)
Visible only with Integral ON (int parameter = On )
Visible only with Maximum limit ON (LLH parameter = On )
Cooling
temperature Set-point
StF
Visible only with Compensation Off ( coP = OFF ) setting

Rev. d 01/1 20 DMP052E
Parameters Loop Pd1 - Mode D1
Push Set key to select the parameter to be modified. The parameter value blinks showing the edit
status: push the Up and Down keys to change values. Once the desired values are modified, push
the Set or Esc keys to exit.
Parameters loop Pd1- Mode D2
Coolin
g
o
p
eratin
g
Set
p
oint (read-onl
y
)
Minimum Set-
p
oint of Coolin
g
com
p
ensation
Minimum Tem
p
erature/Humidit
y
of Coolin
g
com
p
ensation
SoF
Sc3
c3
Max. Set-
p
oint
of coolin
g
com
p
ensation
Max. Tem
p
erature/Humidit
y
of Coolin
g
com
p
ensation
Coolin
g
p
ro
p
ortional
band
Sc4
c4
bPF
Maximum Humidit
y
Limit Set
p
oint
Maximum Humidit
y
Limit Pro
p
ortional Band
SHH
bHH
Visible only with Compensation ON (coP paramete
r
= On )
Visible only with max. humidity limit ON (LLH parameter= On )
Cooling
temperature
Set-point
StF
Visible only with Compensation Off (coP parameter= Of
f
)
Heating operating Set-point (read-only)
Minimum Set-point of Heating compensation
Minimum Temperature/Humidity of Heating compensation
SoC
Sc1
c1
Maximum Set-point of Heating compensation
Maximum Temperature/Humidity of Heating compensation
Heating Proportional Band
Sc2
c2
bPC
Minimum Humidity Limit Set point
Minimum Humidity Limit
Proportional Band
SLH
bLH
Visible only with Compensation On
setting (coP = On )
Visible only with Humidity Maximum limit ON
(LLH = On )
Cooling operating Set-point (read-only)
StC
Visible only with Compensation Of
f
setting
(coP = Off )