Grundfos MAGNA 2000 Series User manual

Table of contents.
1. General description of MAGNA-LON.................................................................................................3
2. Installation..........................................................................................................................................4
3. SNVT Details......................................................................................................................................5
4. SCPT / UCPT Details.........................................................................................................................6
5. Application example...........................................................................................................................7
6. PumpController Functional-Block Details..........................................................................................9
7. Node object......................................................................................................................................32
8. Manufacture specific variables ........................................................................................................34
9. Device resource files........................................................................................................................35
Grundfos A/S, DK-8850 Bjerringbro, Denmark Page 2 of 35

1. General description of MAGNA-LON
The LON-interface add on module for GRUNDFOS MAGNATM (MAGNA-LON) will
connect a GRUNDFOS MAGNATM pump to a LON network. Via MAGNA-LON it is
possible to control the pump and get pump status.
MAGNA LON
pump status
LON
control data
Figure 1
MAGNA-LON is designed using a 3150 neuron chip, an FTT10 transceiver and a 32
Kbyte Flash memory, which makes updating of software possible.
The pump profile in this document is compliant with version 1.0 of “Pump Controller
Object”, from LonMark organization.
The MAGNA-LON module has been developed according to LonMark Application Layer
Interoperability Guidelines 3.3.
MAGNA-LON uses self documentation strings, which means an installation-tool can
access the relevant information over the network, otherwise MAGNALON.XIF can be
found on the same disk as this document.
Grundfos A/S, DK-8850 Bjerringbro, Denmark Page 3 of 35

2. Installation
When MAGNA-LON is delivered it is already configured. This means that when it is
powered up the application program will start. The Flash memory will contain Firmware
version 7.0, and application code. Furthermore the communication parameters will be
present in the EEPROM memory of the neuron-chips. The customer will need to install
the network and make the required bindings.
MAGNA-LON can be installed on a network in two different ways.
1. MAGNA-LON can be installed by pushing the SERVICE pin, which will cause the
neuron-chip to transmit a unique 48 bit ID code to the network.
2. The unique ID code can also be found on the label situated on the side of the
MAGNA-LON interface. The bar code is in Code 39 format. An additional label with the
same unique code is supplied with the MAGNA-LON interface. This label can be
attached to the building installation plan.
MAGNA has a yellow service LED that indicates various states of the interface. When is
delivered it should only flash for a moment and then remain off.
For further information see Echelon documentation.
Grundfos A/S, DK-8850 Bjerringbro, Denmark Page 4 of 35

3. SNVT Details
NV #
Name Recv
HrtBt SNVT Type SNVT Index Class Description
1 nviPumpSetpoint No SNVT_switch 95 RAM Pump setpoint for normal operation
2nviPumpOpMode No SNVT_hvac_mode 108 RAM Requested pump operating mode
6nviPumpOvdStop No SNVT_switch 95 RAM Pump override stop command
7nviOvdSpeed No SNVT_lev_percent 81 RAM Override setpoint for speed
8nviOvdPress No SNVT_press 30 RAM Override setpoint for pressure
10 nviRemotePress Yes SNVT_press 30 RAM Remote differential pressure senor input
11 nviRemoteFlow Yes SNVT_flow_p 161 RAM Remote flow sensor input
3nvoPumpCapacity Yes SNVT_lev_percent 81 RAM Pump capacity as percent of maximum
4nvoEffOpMode Yes SNVT_hvac_mode 108 RAM Effective operating mode
5nvoControlMode Yes SNVT_dev_c_mode 162 RAM Effective device control mode
13 nvoPumpStatus Yes SNVT_dev_status 173 RAM Pump status diagnostic information
14 nvoPressure No SNVT_press 30 RAM Pump pressure
15 nvoFlow No SNVT_flow_p 161 RAM Pump flow
16 nvoSpeed No SNVT_rpm 102 RAM Pump speed
17 nvoPumpOverride No SNVT_switch 95 RAM Pump override active
18 nvoRuntime No SNVT_time_hour 124 RAM Runtime in hours
19 nvoPumpFault No SNVT_dev_fault 174 RAM Fault states of the pump
21 nvoFluidTemp No SNVT_temp_p 105 RAM Fluid temperature
22 nvoPower No SNVT_power 27 RAM Electrical power consumption in watts
24 nvoEnergyConsum No SNVT_elec_kwh 13 RAM Total energy consumption of the pump
SNVT number is according to SFPTpumpController
Grundfos A/S, DK-8850 Bjerringbro, Denmark Page 5 of 35

4. SCPT / UCPT Details
SCPT Name
NV Name
Type or SNVT
SCPT
Index Associated NVs Description
SCPTmaxSendTime
nciSndHrtBt
SNVT_time_sec(107)
49 nv3, nv4, nv5, nv13 Maximum period of time that expires before the functional
block will automatically update NVs
SCPTpumpCharacteristic
nroPumpChar
(structure)
233 Entire Functional Block Maximum flow, maximum pressure and maximum speed
for the pump, defines the pump characteristics.
SCPTlocation
nciLocation
SNVT_str_asc(36)
17 Entire Functional Block Used to provide physical location of the device
SCPTmaxRcvTime
nciRcvHrtBt
SNVT_time_sec(107)
48 nv10, nv11 Maximum period of time that will expires before the
functional block resets to default values, and start using
internal flow, pressure or speed feedback.
SCPTdeviceControlMode
nciControlMode
SNVT_dec_c_mode(162)
238 Entire Functional Block Control Mode for normal operation
SCPTminRemotePressureSetpoint
nciRemMinPress
SNVT_press(30)
239 nv10 Remote pressure-sensor minimum value
SCPTmaxRemotePressureSetpoint
nciRemMaxPress
SNVT_press(30)
240 nv10 Remote pressure-sensor maximum value
SCPTminRemoteFlowSetpoint
nciRemMinFlow
SNVT_flow_p (161)
241 nv11 Remote flow-sensor minimum value
SCPTmaxRemoteFlowSetpoint
nciRemMaxFlow
SNVT_flow_p (161)
242 nv11 Remote flow-sensor maximum value
UCPT_Ti
nciTi
SNVT_time_sec(107)
nv10, nv11 Integral time for PI regulator
UCPT_Ts
nciTs
SNVT_time_sec(107)
nv10, nv11 sample time for PI regulator
UCPT_Kp
nciKp
SNVT_multiplier (82)
nv10, nv11 Gain for PI regulator
Grundfos A/S, DK-8850 Bjerringbro, Denmark Page 6 of 35

5. Application example
Any HVAC unit can use the pump object, either as an actuator, where the pump speed is
used to control the flow or pressure in the HVAC application, or the pump can be used
as an intelligent device, which can maintain a constant pressure in the system. In both
cases the pump can be monitored and manually controlled via the system.
In the following example the pump is used as an intelligent device which is running in
PRESS_COMP control mode. This means the pump will automatically lower the
pressure setpoint in proportion to the system flow. The unit turns the pump into minimum
mode during nighttime via nviPumpOpMode and gets status for pump operation mode
from nvoEffOpMode. The HVAC control unit uses nvoPumpStatus to retrieve status
information from the pump. The controller can use this information to see pump faults
and hardware overrides, and whether the pump is running or not.
The pump is attached to a manual stop button, which can be used to stop the pump.
When the pump is stopped via nviPumpOvdStop the HVAC control unit is no longer
able to control the pump via normal setpoint.
The example also shows a local control and monitor panel. Via this panel the pump fault
status can be seen, as well as the pump flow and pressure. From this local panel it is
possible to give the pump a pressure setpoint. This means the pump will keep a
constant pressure, which will override the HVAC control unit.
The whole system is monitored via a main system.
nvoPumpSetpoint
nvoPumpOpMode
nviPumpCapacity
nviEffOpMode
nviPumpStatus
HVAC-unit
nvoPumpSwitch
Manual stop button
nviPumpStatus nvoOvdpress
nviPumpFlow
nviPumpPress
Local Control &
Monitor Panel
nviPumpSetpoint
Pump object
nviPumpOpMode
nviPumpOvdStop
nviOvdpress
nvoPumpCapacity
nvoEffOpMode
nvoPumpStatus
nvoPressure
nvoFlow
Main control unit
Figure 2
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The Pump Controller profile includes input network variables to manually override the
operation of the pump. A valid value on any one of these input variables sets the pump
into the override mode. The pump will not return to normal setpoint control until all
manual override inputs are invalid. The priority of the various override inputs can be
seen in Figure 3
Figure 3
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6. PumpController Functional-Block Details
Confi
g
uration
nc49 nciSndHrtBt
nciControlMode
nc17 nciLocation
nv1 SNVT_switch
nviPumpSetpoint
nv2 SNVT_hvac_mode
nviPumpOpMode
nv3 SNVT_lev_percent
nvoPumpCapacity
nv4 SNVT_hvac_mode
nvoEffOpMode
nv5 SNVT_dev_c_mode
nvoControlMode
nv13 SNVT_dev_status
nvoPumpStatus
nv6 SNVT_switch
nviPumpOvdStop
nv7 SNVT_lev_percent
nviOvdSpeed nv14 SNVT_press
nvoPressure
nv15 SNVT_flow_p
nvoFlow
nv16 SNVT_rpm
nvoSpeed
nv18 SNVT_time_hour
nvoRuntime
nv19 SNVT_dev_fault
nvoPumpFault
nv20SNVT_temp
nvoFluid-
nv24 SNVT_elec_kwh
nvoEnergyConsum
nv17 SNVT_switch
nvoPumpOverride
nv21 SNVT_temp_p
nvoFluidTemp
nv22 SNVT_power
nvoPower
nv8 SNVT_press
nviOvdPress
nv10 SNVT_press
nviRemotePress
nv11 SNVT_flow_p
nviRemoteFlow
nroPumpCharnc233 nciRcvHrtBtnc48 nciRemMinPressnc239 nciRemMaxPressnc240 nciRemMinFlownc241 nciRemMaxFlownc242
nc238
Figure 4
Grundfos A/S, DK-8850 Bjerringbro, Denmark Page 9 of 35

Pump setpoint
network input sd_string(“@p|1”) SNVT_switch nviPumpSetpoint;
This input network variable provides start/stop control and a setpoint. The setpoint is given as a
percentage of the effective maximum value (max. = 100%). The setpoint value can represent the
pump speed, the pressure or the flow, depending on the Effective Operating Mode of the pump
(nvoControlMode).
Pump Specific
Setpoint High
Limit
Pump Specific
Setpoint Low
Limit
100%
STOP Pump SetpointnviPumpSetpoint [%]
EffectivePumpSetpoint
X
Figure 5
Effective Setpoint vs Actual Setpoint
%100
LimitHighSetpointSpecificPump LimitLowSetpointSpecificPump
X∗
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
=
Or
%100
ValueHighSensor-Remote ValueLowSensor-Remote
X∗
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
=
Grundfos A/S, DK-8850 Bjerringbro, Denmark Page 10 of 35