Controlli NC7311 User manual

Rev. a 03/05 1DMP025E
USER MANUAL
NC7311
DIGITROLL 7000
ISO 9000

USER MANUAL
1ST Issue 10/00 2DMP025E
INDEX
1. PREFACE ........................................................................................................................................ 3
2. OPERATION ................................................................................................................................... 4
3. OPERATION MODES .................................................................................................................. 18
3.1. READER'S PROFILE.................................................................................................................... 18
3.2. FEW HINTS ON OPERATION SEQUENCE................................................................................. 18
3.2.1. Browsing ............................................................................................................................... 19
3.2.2. Data display .......................................................................................................................... 20
3.2.3. Programming......................................................................................................................... 21
3.3. DISPLAYING AND PROGRAMMING......................................................................................... 22
3.3.1. Display and setting of "Controller Status Page"..................................................................... 22
3.3.2. Displaying and setting of the Controller grouping ................................................................. 24
3.3.2.1. Selection of a group controller........................................................................................................25
3.3.2.2. Selection of a single privileged Controller ......................................................................................25
3.3.3. Displaying and setting of regulation parameters for single or group Controllers ................... 27
3.3.4. Displaying and setting of time schedules................................................................................ 33
3.3.4.1. Daily schedules..............................................................................................................................33
3.3.4.2. Weekly schedules...........................................................................................................................37
3.3.4.3. Vacation and holiday schedules......................................................................................................40
3.3.4.3.1. Holidays.................................................................................................................................40
3.3.4.3.2. Vacations ...............................................................................................................................44
3.3.5. Displaying and setting of the controllers regulation parameters ............................................ 47
3.3.5.1. AUTOmatic operation setting.........................................................................................................48
3.3.5.2. PERManent manual operation setting.............................................................................................50
3.3.5.3 TEMPorary manual operation setting ..............................................................................................51
3.3.6. Displaying of work parameters of each Controller................................................................. 53
3.3.7. Displaying of the operation parameters averages .................................................................. 55
3.3.7.1. Displaying of the room temperatures averages ................................................................................58
3.3.7.2. Displaying of mode averages ..........................................................................................................59
3.3.7.3. Displaying of the actuators opening percentages averages...............................................................60
4. DIAGNOSTICS.............................................................................................................................. 61
4.1. SYSTEM DIAGNOSTICS ..................................................................................................................... 63
4.2. CONTROLLER DIAGNOSTICS ............................................................................................................. 64
4.3. STATUS AND AUTHORITY DISPLAY.................................................................................................... 65
4.4. LOADING DEFAULT VALUES ............................................................................................................ 66
4.5. DATA PRINT .................................................................................................................................... 68
5. FRONT PANEL DESCRIPTION.................................................................................................. 69
6. PAGE CONFIGURATION............................................................................................................ 70

Rev. a 03/05 3DMP025E
1. PREFACE
NC7311 Control Unit, in connection with NR Controllers, can be
used in the centralised systems for the regulation of room
temperature.

USER MANUAL
1ST Issue 10/00 4DMP025E
2. OPERATION
NC7311 Control Unit operates by assigning to the controllers one of
the four possible operation modes corresponding to different system
operation requirements.
•COMFORT mode (NM) with set point programmable by the
Control Unit.
•UNOCCUPIED mode (RC), which can be reset by acting on the
room sensor, with a set point of ±3.5K (depending on SUMMER
or WINTER operation) with respect to the COMFORT mode.
•UNOCCUPIED mode (RF), not modifiable manually, with the
same set point of the (RC) UNOCCUPIED mode.
•ANTI-FROST mode (AF) with set point at 8°C.
The modes vary according to daily and weekly schedules, holiday
and vacation periods and manual overrides activated by the
operator.
The set point of NM, RF and RC modes may be modified for
WINTER-SUMMER condition actions in order to compensate the
outside temperature detected by the sensor.
For an easier operation, answering to the real needs of the system, it
is possible to subdivide the controllers into groups (up to four) each
corresponding to a specific area.
Controllers belonging to the same group operate with the same time
schedules, modes, operation and calibration set point values, as
further described.
Controllers may be assigned to a group following their belonging to a
homogeneous plant zone: this does not imply any modification in the
existing connections.

USER MANUAL
1st Issue 10/00 5DMP025E
When required, the controllers may be considered as “SINGLE”. It is
possible to assign to each one of these controllers, certain operation
parameters, allowing an independent management of specific
premises.
Setting operations are carried out on the Control Unit; thus,
cyclically, it supplies data to all the programmed controllers.
Setting the operation parameters for every group.
For every group (up to four) it is possible to set:
•Controllers belonging to the group.
•COMFORT mode set point.
•Dead zone between heating and cooling action.
•The actuator stroke timing of C Channel (Hot).
•The actuator stroke timing of F Channel (Cool).
•(P or P+I) regulation timing.
•The proportional band for the two channels (C and F).
•Integration time for the two channels (C and F).
•Start point and authority for winter/summer compensation.
•Cooling qualification for RC and RF modes.
•Weekly and daily schedules.
•Holiday and vacation period’s modes.
•Overrides in pre-set modes.
Setting operation parameters for SINGLE controllers
For each SINGLE controller have to be set individually the same
parameters of the groups, excluding weekly and daily schedules,
holidays and vacation periods. In the latter case, the controllers use
the parameters of the group they belong to.
Actuator stroke timing
For a correct indication of the actuator position, each controller,
driving a bi-directional actuator, requires the real value of the
actuator stroke timing.
Therefore, the operator is asked to input a value between 0 and 100
corresponding to 0-480 seconds of stroke timing, only for those
controllers driving bi-directional actuators

USER MANUAL
1ST Issue 10/00 6DMP025E
Data display
It is possible to check the operation and eventually modify the
parameters set using the function keys and the data display (4 lines
–20 rows) placed on the front panel.
All data are available by browsing the various Menu-like organised
pages.
Besides all programmed data, for each controller it is possible to
display:
•The group each controller belongs to.
•Single controller status.
•The value of the controlled size (with a precision of ± 0,5 K at 21
°C).
•The value of the actual set point (including compensation and
local re-calibration).
•Operation mode.
•Opening percentage of heating and cooling actuators.
Moreover, the control unit processes data from the controllers and
allows the display of the following data:
•Minimum detected room temperature.
•Maximum detected room temperature.
•Average detected room temperature.
•Percentage of the controllers operating in COMFORT mode (NM).
•Percentage of the controllers operating in UNOCCUPIED mode
(RC + RF).
•Percentage of the controllers operating in ANTI-FROST mode
(AF).
•Average position of heating and cooling actuators.
Weekly schedules
It is possible to create up to 5 different time schedules with a
maximum of 6 mode changeovers.
To each controller group can be assigned, for each day of the week,
either one of the 5 time schedules or one of the operation modes
mentioned above.
Therefore, a specific weekly schedule can be generated for each
controller group.

USER MANUAL
1st Issue 10/00 7DMP025E
Holidays and vacation periods (yearly programme)
To each group it is possible to set up to 10 public holidays and 5
vacation periods assigning one of the following modes unoccupied
(RF+RC), anti-frost (AF), and comfort (NM).
This implies the creation of a “yearly programme” which substitutes
the time schedules during the set periods.
Manual control (override)
In some cases (i.e. meetings, steady conditions of premises
vacation) may be necessary to edit the assigned time schedules.
For this purpose a manual override, of one or more groups, and of
one or more single controllers, has been pre-set, allowing a choice
between the four (NM, RC, RF and AF) available modes.
There are two types of override:
•Temporary: at midnight the control is re-assigned to the time
schedules.
•Permanent: the group or the single controllers follow the mode
assigned until the automatic control is set anew.
On the control unit the operating status (manual or automatic) of
each group is constantly displayed.
Manual indication is activated also for single controllers, in case at
least one of them finds itself in the manual status.

USER MANUAL
1ST Issue 10/00 8DMP025E
Priority
The operating priorities the control unit follows are:
1. "Permanent" group override.
2. “Temporary" and "Permanent" override of the single (privileged)
controllers.
3. "Temporary" group override.
4. Vacation period programme.
5. Holiday programme.
6. Weekly schedule.
Summer/winter changeover
The control unit is provided with 4 inputs in order to set
summer/winter operation for each group.
The open contact corresponds to winter set up.
Cooling and heating qualifications
The control unit is provided with an input (two terminals), so as to
inhibit the cooling action for the whole system (closed contact =
cooling inhibited), and with four inputs (five terminals) inhibiting the
heating action in each group
When the actions are inhibited, the corresponding actuators are
closed independently from the set mode.
Storage of programmed data
Programme data are stored on a memory (TimeKeeper) and remain
the same even if the power supply is absent.
Connection with controllers
Instructions and information between the control unit and the
controllers are exchanged through an intelligent two-lead polarized
"BUS" connection.
The RS485 serial communication type is particularly indicated for its

USER MANUAL
1st Issue 10/00 9DMP025E
characteristics of high immunity to interferences and since it allows
long connections with a large number of devices.
The overall time elapsing between call and reply is of approximately
0,4 seconds. Each controller is recognised by the control unit
through an “address card” which has to be installed in the controller
itself before powering it.
Progressive numbers from 1 to 160 label the cards. The cards are
supplied in packages identified by the model NS 71...74.
For the latter controllers the following parameters cannot be
programmed:
•Heating and cooling actuators stroke timings.
•Control type.
•Proportional band.
•Integration time.
A Dip Switch (Dip 4 of Sw1) gives the opportunity to activate the
above mentioned options and it becomes necessary in case the
system presents, on the same BUS, both old and new generation
controllers.
Connection with supervisor.
Each control unit is able to communicate with different supervision
systems through either RS232 (standard) or RS485 (optional) serial
ports.
Since each monitoring system is equipped with its special
communication protocol, the control unit will have to be assembled
with a dedicated programme memory.
MANUFACTURING CHARACTERISTICS
The product is composed of the control unit itself and of a shock-
resistant thermoplastic mounting kit that contains the terminal boards
and allows an easy wall mounting.

USER MANUAL
1ST Issue 10/00 10 DMP025E
The cables enter the case from the bottom through five cable
sleeves protected by removable plastic plugs; it is possible to insert
PG 13,5 compression glands.
The display and the keys are protected by a front panel and by an
elastic film.
TECHNICAL CHARACTERISTICS
Power supply 24 V~ ±10%
Consumption 5 VA
Terminal board screw-type for 2.5 mm2
max. cross section wires
Cable sleeves 5holes for PG 13,5
compression glands
Protection degree IP 40
Room temperature (Working) T50
Room temperature (Storage) -20T70
Weight 1.2 Kg. max
Microprocessor INTEL 80c32
Memory (EPROM) 64 Kbytes
Data memory
(RAM with integrated buffer) 32 Kbytes
Measure inputs
Outside temperature -20...+40°C
Digital inputs SPST connection
Communication with controllers
Interface RS 485
Speed 1200 baud
Cables Polarized twisted double cables with
min. 0,3 mm2cross section
Connection with printer
Interface EIA RS 232
Max. length 15 m
Speed 1200 baud

USER MANUAL
1st Issue 10/00 11 DMP025E
Connection with supervisor system:
Interface EIA RS232
EIA RS485 (optional)
Max. length 15 m with RS232
150 m with RS485
The product conforms to EMC 89/336 directive with reference to the
below mentioned standards:
EN50081-1for emission
EN50081-1for immunity

Rev. a 03/05 12 DMP025E
POSSIBLE COMBINATIONS AND CONNECTIONS
The control unit can be used with every type of NR7000 controllers,
with SBE type outside temperature sensor and with supervision
system.
As far as the connection with supervision system is concerned,
please contact our Technical Assistance.
Consumption data and power supply and communication criteria are
available on the DIGITROLL 7000 leaflet.
INSTALLATION AND START-UP
Installation
NC7311 control unit is suitable for wall and rack mounting (through a
kit of connecting clamps).
Perform wiring in compliance with the outside connection diagram
and with the existing rules.
It is important to check if the BUS connections are correct in order to
ensure communication between the control unit and the controllers:
in case of faulty connections, the controllers will operate stand
alone, as if the control unit were not installed.
Start-up
The control unit allows editing the operating programmes and
parameters in accordance with the different system requirements.
For an easier start-up stage is available a set of default data which
can be used in every moment by pressing two keys; in order to set
exact date and time as described in the leaflet attached to the
controller.
ATTENTION:
It is necessary to terminate the Communication Bus at the two most distant
devices (controller/unit).
For NR controllers it is necessary to open the controller cap and close the
JP1 jumper.
For the Unit it is necessary to insert in parallel a 121 Ohm 1/4 W
Resistance between the Bus terminals (RT1 and RT2).
In case of replacement of a NC7111 unit (conveyed waves bus) with an
NC7311 (RS485 bus ) it is necessary to insert the DG7ROUT2repeater
and to place the jumper 2 of SW1 in OFF position in order to configure it
for old-type protocol management.

1st Issue 10/00 13 DMP025E
DEFAULT DATA AND RELATED MODIFICATION RANGES
Description Range Pre-program.
value
NR. of controllers. 1...160 100
Existing groups 1...4 1
Single controllers 0...160 0
RC/RF cooling qualification Yes/No No
Set point in NM mode 11...29°C 21°C
Dead zone 0...6k 3K
C channel actuator stroke 0...100% 34%
F channel actuator stroke 0...100% 34%
Control type P / P+I P
C channel proportional band 0,8.... 7,2 4.0°C
Fchannel proportional band 0,8.... 7,2 4.0°C
C channel integration time 1... 30 5 S.
F channel integration time 1... 30 5 S.
Summer comp. start point 20...35°C 27°C
Authority comp. 0...99% 40%
Winter comp. start point 0...20°C 5°C
Authority compensation 0...99% 60%
There are four default time schedules :
Schedule 1 Schedule 2 Schedule 3 Schedule 4
time mode time mode time mode time mode
7:30 NM 6:00 NM 6:00 RC 7:00 NM
12:30 RC 12:00 RC 7:30 NM 12.00 RC
14:00 NM 13:00 NM 12:00 RC 13:00 RF
17:00 RC 17:00 RC 13:30 NM
19:00 AF 21:00 RF 17:30 RC
---- ---- 19:00 AF
Minimum interval 10 minutes: resolution 10 minutes.

1st Issue 10/00 14 DMP025E
Weekly schedule:
MON TUE WED THU FRI SAT SUN
1111111
All controllers are set in Automatic Control
SELF AND SYSTEM TESTS
The control unit is equipped with self-test functions:
•Clock misfunctioning.
•Data memory misfunctioning.
•Outside sensor misfunctioning.
In presence of one of the former anomalies, the communication with
the controllers is interrupted; the latter, after 10 minutes have
elapsed, pass to stand-alone operation with set point at 20 °C.
Moreover, there are system diagnostic functions:
•Misfunctioning of one or more controllers.
•Damaged serial bus.
When even if only one of the above-mentioned conditions occurs, an
intermittent red signal, on the control unit front panel, is activated: by
pushing the TEST key it is possible to detect the specific cause of
misfunctioning.
FTHE OUTSIDE SENSOR MISFUNCTIONING IS DISPLAYED IN
THE “CONTROLLER STATUS PAGE” BY TYPING ”---“ INSTEAD
OF THE TEMPERATURE VALUE DISPLAY.
It is, moreover, possible to display the status of the digital inputs
(S/W qualifications and changeovers) in order to check the
correctness of the related connections.

USER MANUAL
1st Issue 10/00 15 DMP025E
TERMINAL BOARD
N3096
LEGEND
L1 24 V∼power supply
L2 “
GND Earth
MGround common input
V+ Common V+ input
S1 Outside sensor
Q1 Digital input
Q2 Digital input
Q3 Digital input
Q4 Digital input
Q5 Digital input
Q6 Digital input
Q7 Digital input
Q8 Digital input
Q9 Digital input
RT (-) Communication BUS
RT (+) RS 485
RS232 Serial communication BUS

USER MANUAL
1ST Issue 10/00 16 DMP025E
EXTERNAL CONNECTIONS DIAGRAM
N3095
LEGEND
S1 SBE external sensor
Q3 Cooling qualification
Q4 Heating qualification .Group 1
Q5 Heating qualification .Group 2
Q6 Heating qualification .Group 3
Q7 Heating qualification .Group 4
Q8 S/W changeover Group 1
Q9 S/W changeover Group 2
Q1 S/W changeover Group 3
Q2 S/W changeover Group 4
RS 485 Connection towards controllers
RS 232 Serial connection

USER MANUAL
1st Issue 10/00 17 DMP025E
OVERALL DIMENSIONS
FRONT PANEL DRILLING

USER MANUAL
1ST Issue 10/00 18 DMP025E
3. OPERATION MODES
3.1. READER’S PROFILE
•An “expert” reader may need to read only paragraph 3.3 where
user interface architecture, page browsing modalities, data
display and programming are described.
•To an operator who, for the first time, uses digital devices it is
advisable, after reading carefully paragraph 3.2, to read also
paragraph 3.3, where it is described, step-by-step, the operation
sequence in order to display and/or programme each datum.
3.2. FEW HINTS ON OPERATION SEQUENCE
NC7311 user interface is composed of an alphanumeric display and
seven function keys.
All the information can be reached through a browsing of the tree-
organised pages and, therefore, detectable by menu pages.
Pressing the suitable keys it is possible to display and/or programme
one or more data in the various pages.

USER MANUAL
1st Issue 10/00 19 DMP025E
3.2.1. Browsing
When the apparel is in normal operating conditions, the display
shows the following page defined as controller status page”.
Mo 13 Jan ‘97 17:55
Out Temp + 22.5^C
Gr1 Gr2 Gr3 Gr4 Sng
A-H A-H A-H A-H M
The key selects the MENU page which allows to access,
accordingly to the selected line, other pages so as to get information
and to perform settings related to the connected controllers.
+ MENU
CONTROLLERS
TIME SCHEDULE
CONTROLLERS STATE
-MENU
MAN/AUTO CONTROL
AVERAGE VALUES
At the top left of each page, except the first one, there are “+”or “-”
signs.
“+” sign indicates there is a page under the one displayed.
MENU

USER MANUAL
1ST Issue 10/00 20 DMP025E
If the cursor is positioned on the former sign, by pressing the
key the following page is displayed.
Similarly the sign “-” indicates there is an upper level page,
therefore, by pressing the key the upper-level page is
displayed.
Whichever page is displayed, after 3 minutes without pushing any
key the controller passes back to the status page ”.
3.2.2. Data display
To view data belonging to a specific controller, it is sufficient to enter
the page containing the chosen data.
Use the key to go near the “Gr” or “Sn” string, when possible.
Use or keys to alternate Group (Gr) or Single (Sn)
controller data display.
Use the key to go after the “Gr” or Sn” strings.
Use or keys to select a group or a programmed controller.
ENTER Ã
ENTER Ã