Grundfos MAGNA 2000 Series Bedienungsanleitung

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

Grundfos A/S, DK-8850 Bjerringbro, Denmark Page 7 of 35

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

Grundfos A/S, DK-8850 Bjerringbro, Denmark Page 8 of 35

6. PumpController Functional-Block Details

Confi

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

Figure 5

Effective Setpoint vs Actual Setpoint

%100

LimitHighSetpointSpecificPump LimitLowSetpointSpecificPump

X∗

⎟

⎠

⎞

⎜

⎝

⎛

%100

ValueHighSensor-Remote ValueLowSensor-Remote

X∗

⎟

⎠

⎞

⎜

⎝

⎛

Grundfos A/S, DK-8850 Bjerringbro, Denmark Page 10 of 35

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