ENGL ISH hydronic syst.
Fig. 5.a
ENGL ISH hydronic syst.
5.1.1 Single node
In this mode, the information that the master must send to all the slaves (LOGIC parameter) can be set, as well as the information accepted by each individual slave (DEPENDENCE). The set of a master and its slaves is a “zone”. All the settings are performed on the master from the panel.
par. def. min. max. setting
P66 0 0 1 e-drofan master or slave; 0= slave; 1= master
P67 1 1 125 Serial address on CANbus. Can be set on the acqua terminal if the serial address specifi ed on the CAN board dipswitches is 0
P68 0 0 7 Master LOGIC (see the table below)
P69 1 1 207 485 networks serial address (used only with 485 serial board) P70 0 0 7 DEPENDENCE of the controller on its master (e-drofan or
pCO):
0= the control ignores any data from its master 1= the controller accepts: ON/OFF, ECONOMY/ SLEEP
2= the controller accepts: ON/OFF, ECONOMY/ SLEEP, mode, comfort 3= the controller accepts: ON/OFF, ECONOMY/ SLEEP, mode, comfort, set point 4= the controller accepts: ON/OFF, ECONOMY/ SLEEP, mode, comfort, set point, fan speed
5= the controller accepts: mode, comfort, set point 6= the controller accepts: mode, comfort, set point, fan speed 7= the controller accepts: all the data from its master.
P71-P80 0 0 207 CANbus addresses of the slave
P81-P90 0 0 7 Dependence of the slave: 0= the slave ignores all data from the master
1= the slave accepts: ON/OFF, ECONOMY/ SLEEP
2= the slave accepts: ON/OFF, ECONOMY/ SLEEP, mode, comfort 3= the slave accepts: ON/OFF, ECONOMY/ SLEEP, mode, comfort, set point 4= the slave accepts: ON/OFF, ECONOMY/ SLEEP, mode, comfort, set point, fan speed 5= the slave accepts: mode, comfort, set point
6= the slave accepts: mode, comfort, set point, fan speed 7= the slave accepts: all the data from the master.
Table 5.c The occupancy function uses the economy/sleep variables to manage the network.
Data propagated according to the LOGIC parameter LOG.=1 LOG.=2 LOG.=3 LOG.=4 LOG.=5 LOG.=6 LOG.=7 **
ON/OFF √ √ √ √ √ √ √
ECONOMY/SLEEP √ √ √ √ √ √ √
Mute ALARM (future use) √ √ √ √ √ √ √
Control performed with probe value sent from the zone master (if DIP 6= ON on the master) √
Control performed with probe value sent from the chiller controller (PCO) √
Set point propagated by zone master √ √ √ √* √
Operating mode and comfort function propagated by zone master √ √ √ √
Fan speed propagated by zone master √ √ √ √ √
Flap position propagated by zone master (future use)
Mode, comfort, set point, fan speed and fl ap position at switch OFF->ON only propagated by zone master (a only time).
√ Use by zone master and slaves of the control probe value calculated as average of all the control probes in
the zone (including slaves)
√ Different set points propagated for the various slaves in the zone. The set points are specifi ed for the related
dependence parameters (the dependence is set to 7 for all the slaves in the zone) (e.g. P81= e-drofan slave1 set point etc.)
√ Different offsets (from zone master set point) propagated for the various slaves in the zone. The offsets are
specifi ed in the related dependence parameters (the dependence is set to 7 for all the slaves in the zone) (e.g. P81= e-drofan slave1 offset); e-drofan slave1 set point= e-drofan master set point + P81 etc.)
√
Fig. 5.b
ENGL ISH hydronic syst.
IMPORTANT:
Before modifying a parameter on the master (related to the confi guration of the network), the e-drofan must be set as a slave (P66= 0); once the operation has been completed, the e-drofan can be confi gured as the master.
The pCO chiller controller can deactivate some buttons on the e-drofan terminals via the hydronic network.
Following the setting of the DEPENDENCE parameter, a number of buttons on the e-drofan slave termi- nals are deactivated. These restrictions are required to avoid confl icts between the operation set by the master and any settings made by the user on the e-drofan slaves (using the acqua terminal).
Buttons locked on the terminal by the KEYLEVEL parameter key level=1
key level=2
key level=3
key level=4
key level=5
key level=6
key level=7
key level= 8
key level= 9
ON/OFF button √ √ √ √ √
MODE button √ √ √ √ √
FAN speed button √
SET button √ √ √ √ √ √ √ √ √
CLEAR/SLEEP button (ECON. from digital input) √ √ √
TIMER button √ √ √ √ √ √ √ √ √
UP button √ √ √
DOWN button √ √ √
Table 5.d
* Reserved for future uses.
Description of the LOGIC parameter:
• LOGIC 1: The same as the broadcast, with the addition of displaying the alarms relating to the slaves on the master terminal.
• LOGIC 2: Operation as per broadcast, with the addition of displaying the alarms relating to the slaves on the master terminal; all the e-drofans in the zone are controlled based on the probe value sent by the chiller controller (pCO). Useful for algorithms resident on the pCO.
• LOGIC 3: Operation as per broadcast (with slave alarms displayed on the master terminal) but data sent only at power-up of the master. Modifi cations can be made to operation by the user controlling the slave (e.g. change fan speed to reduce noise). Useful for aligning the status of the slaves in a zone with the corresponding master (e.g. Start-up in the morning).
• LOGIC 4: The master propagates ON/OFF, ECONOMY/SLEEP and control probe; all the remaining functions can be modifi ed on the slaves. The control probe reading is the average of the probes (B1 or BT) on all the slaves in the zone. Useful for giving priority to control of the average temperature in an environment rather than single point control (see Fig. 5.2).
• LOGIC 5: Operation as per broadcast (with slave alarms displayed on the master terminal). The master propagates different set points for each slave (these can be set on the master terminal). Useful in zones featuring slaves without terminals.
• LOGIC 6: Operation as per broadcast (with slave alarms displayed on the master terminal). The master propagates different set points for each slave (these can be set on the master terminal as offsets from the set point). Useful in zones featuring slaves without terminals.
• LOGIC 7: Reserved for future uses.
Key:
1. Average of BT on unit 1, BT unit 2, BT unit 3 Bcontrol= (21+22+23)/3= 22°C 2. Set: 23 °C
BT: 21 °C;
3. Set: 23 °C BT: 22 °C 4. Set: 23 °C BT: 23 °C.
The off status, determined by ON/OFF digital input, has priority over the command sent by the master;
this operation is required to allow the user to turn off the fan coil to stop the fl ow of cold air.
The area controller/chiller controller can nonetheless force the settings on the e-drofan irrespective of the dependence setting (useful in some extreme situations) and can acquire some useful information (status of digital inputs, heating/cooling request...etc.); for this information and for the further algorithms (comfort, energy savings.. that reside on the chiller controller (pCO)), refer to the corresponding user manual.
IMPORTANT:
If communication is interrupted between a slave e-drofan and its master (e.g. disconnection ...etc.) the slave stops automatically, nonetheless, it can be re-activated if fi tted with the acqua terminal or remote control (in this case, the device has full control over all the functions).
AUTO MAN ON OFF HR
Meeting room
master
120 ohm
slave slave slave
slave
120 ohm
1
2 3 4 5
6 7
Fig. 5.c.a
AUTO MAN ON OFF HR
AUTO MAN ON OFF
HR
120 ohm
Meeting room
master master slave
slave slave
120 ohm
1 1
2 3 4 5 6
7 8
Fig. 5.c.b
Fig. 5.d
ENGL ISH hydronic syst.
Below is an example of the possible reconfi guration of the e-drofans if the spaces are reorganised.
Initial confi guration of a zone:
Key:
1. acqua terminal;
2. P66= 1;
P71= 22;
P72= 23 P73= 24 P74= 25;
3. serial card, ID= 21 4. serial card, ID= 22;
5. serial card, ID= 23;
6. serial card, ID= 24;
7. serial card, ID= 25
Key:
1. acqua terminal;
2. P66= 1;
P71= 22;
P72= 25;
3. serial card, ID= 21 4. serial card, ID= 22;
5. P66= 1 P71= 24 6. ID= 23;
7. serial card, ID= 24;
8. serial card, ID= 25 Confi guration after the division of the zone into two parts:
5.1.2 Integrated hybrid systems
Integrated hybrid networks can be created, that is, single node structures with the chiller controller and only the e-drofan master (where the slaves are connected in the tLAN and without the acqua terminal).
Fig. 5.e
ENGL ISH hydronic syst.
5.1.3 e-drobus
If only the CANbus connection is used, there is still the possibility to create networks in which the pCO acts as both chiller controller and area controller (that is, manages the 16 masters connected in the network).
To exceed the limit of 16 master units (necessary for multi-storey buildings), systems must be adopted in which one pCO only acts as area controller, while the chiller is controlled by a dedicated device (connected to the area controller, e.g.: pCO, µCH2).
In this case, a maximum of 64 e-drofan masters can be connected to the area controller, and the remaining units (up to a maximum of 100) can be assigned as slaves to the e-drofan masters. The area controller has complete control over the masters directly connected, while as regards the slaves assigned to the master, it can only act on the related logic and dependence parameters (resident on the master).
5.2 Signals and diagnostics
The CANbus serial board has three LEDs to display the serial communication status relating to the device it is installed on.
The green LED is always on when power is connected.
When the board is initialising, the red and yellow LEDs fl ash in specifi c sequences. After around 20s, when initialisation is complete, the following situations may occur:
green LED yellow LED
red LED meaning actions
ON ON steady OFF ON line (master or slave) OK
ON OFF ON steady OFF line (slave only) - check confi guration of master - check address P67 - check wiring ON ON steady fl ashing Comnunication problems be-
tween e-drofan and CANbus serial board
- check P69=1 - check correct connection
ON ON steady ON steady Serious error Contact CAREL S.p.A.
ON OFF OFF Serious errorgrave Contact CAREL S.p.A.
OFF any any No power - check power supply
- check correct connection Table 5.e
Fig. 5.f
ENGL ISH hydronic syst.
5.2.1 Alarms
The acqua terminal displays the alarms on the e-drofan it is connected to, as well as those on the corre- sponding slaves. When it displays the alarms on its own e-drofan, the signal starts with “A” (e.g. A04), while when displaying those relating to the slaves in the zone, the signal starts with “S” (the second number indicates which slave it refers to (from 0 to 9), while the third number indicates the alarm code).
The codes for the slave alarms (third number) are the same as described in section “constructor”, with Sn0 add: (n = Slave address): Slave not present.
The alarms on the master have priority over the slaves (see section “constructor”), the alarms on the diffe- rent slaves are displayed in sequence (for each slave, the alarm with the highest priority is displayed).
The e-droset terminal only displays the index of the slave with the alarm.
5.2.2 Notes on confi guring hydronic networks
During the confi guration of the hydronic networks, the following instructions should be observed:
IMPORTANT:
Avoid settings that create situations of confl ict.
note description related events
1 If confi guring a series of e-drofans, fi rst confi gure the slaves and then the corresponding master, or alternatively perform the settings with the CANbus disconnected.
If this sequence is not observed, some buttons on the terminal connected to the slave may be locked due to of the dependence set on the master, thus preventing the correct confi guration of the slave/slaves.
2 With logic 5 and 6 do not connect the acqua terminals on the slaves. The information propagated via the CANbus may be lost.
3 The logic must be set on the master before the dependence on the slaves. The related parameters (dependence P81-P90) may have different meanings (see logic 5 and 6) when the logic changes. When logic is 5 (different set points) the limits are 7 to 35°C, when logic is 6 (offset from the set point on the master) the limits are -5 to +5.
4 Some functions can be activated both locally (digital inputs) and remotely (via serial connec- tion). To avoid confl icts, install the ON/OFF, ECONOMY and PRESENCE digital inputs only on the e-drofan master. The slaves can only be connected to the inputs relating to the alarms (window alarm, circulating pump alarm and local stop).
The status of an e-drofan slave is continuously controlled by its master. The master is set by the area controller/chiller controller just once, which allows the subsequent modifi cation of its status (e.g. from the presence or ON/OFF inputs etc.). The continuous or periodical control of the master must be included in the area controller/chiller controller application.
5 So as to avoid confl icts, the cooling/heating function (to be installed on the master only) must be set only by digital input or via serial communication.
The same must be applied to the remote off (settable by dipswitch).
In this regard, the dependence is set to 0 when DIP 2 or 3 is ON (only when starting), while there is still the possibility to change the dependence from the area controller/chiller controller.
In the event of confl icts between the digital input and the area controller/chiller controller, operation is not affected, however there will be intense traffi c in the serial communication, causing a decline in performance.
6 The specifi cations provided for the acqua terminal are also valid when using the remote control, with the exception of the keypad lock. In fact, if a function is locked, the remote control still sends the data, which are however ignored by the e-drofan; consequently, there may be discrepancies between the information shown on the display of the remote control and the operation of the device.
7 The slaves should be fi tted ON/OFF digital inputs (without acqua terminal or remote control, or if ON/OFF is disabled). In this way, the user can switch the unit off to stop the fl ow of hot/cold air.
Table 5.f
5.2.3 Notes on the serial address settings
The serial address in a CAREL or Modbus® network is assigned by the e-drofan board using parameter P69 “local network address”.
In a CANbus network, on the other hand, the device network address is assigned by parameter P67
“CANbus serial address”. For correct communication between the CANbus serial board and the e-drofan, parameter P69 must be set to 1 (this is the default setting).
Key: 1. slave alarm;
2. slave;
3. room probe fault.