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<strong>Grundfos</strong> E-<strong>pumps</strong><br />
8<br />
8. Bus communication<br />
Bus communication with E-<strong>pumps</strong><br />
All <strong>Grundfos</strong> E-<strong>pumps</strong> are fitted with a fieldbus<br />
interface based on the RS-485 hardware platform.<br />
The bus is named GENIbus (<strong>Grundfos</strong> Electronics<br />
Network Intercommunication) and is a <strong>Grundfos</strong>developed<br />
bus with its own protocol. The GENIbus<br />
was first introduced in 1991 when <strong>Grundfos</strong> introduced<br />
the first <strong>pumps</strong> with integrated variable frequency drive<br />
and controller to the market.<br />
Bus communication between E-<strong>pumps</strong> and other<br />
equipment like building management systems<br />
(SCADA) can take place with a <strong>Grundfos</strong> gateway and<br />
a standardized fieldbus, for instance Profibus.<br />
CIU<br />
CIM<br />
Communication to other equipment via<br />
a <strong>Grundfos</strong> gateway<br />
E-<strong>pumps</strong> can communicate with building management<br />
systems (SCADA) via a CIU unit which converts from<br />
the GENIbus to another fieldbus, such as LON,<br />
Profibus, Modbus, etc.<br />
CIU unit<br />
The <strong>Grundfos</strong> CIU unit (Communication Interface Unit)<br />
is used as a gateway for communication between<br />
E-<strong>pumps</strong> and other buses than GENIbus.<br />
The CIU unit is to be mounted on the wall or in a<br />
cabinet. It contains a CIM module (Communication<br />
Interface Module) for a specific bus.<br />
The CIU unit has no functionality in itself, but must<br />
have a CIM module fitted to be able to communicate.<br />
The CIU unit must be used for MLE motors, 10 Hp and<br />
below. The CIM module can be fitted directly in the<br />
MLE motor terminal box (15 - 30 Hp only).<br />
Communication<br />
The CIU unit can communicate the following data<br />
points between the E-<strong>pumps</strong> and the management<br />
system:<br />
CIU unit<br />
Bus communication<br />
Only 15 - 30 Hp<br />
<strong>pumps</strong><br />
Fig. 64 Bus communication for E-<strong>pumps</strong><br />
TM05 2979 0812<br />
Data points<br />
Multistage<br />
E-<strong>pumps</strong> with or<br />
without sensor<br />
TP<br />
Series 1000<br />
without<br />
sensor<br />
TPE<br />
Series<br />
2000<br />
From management system (SCADA) to E-pump<br />
Control mode ● 1) ● 1) ● 2)<br />
Setpoint, 0-100 % ● ● ●<br />
Start/stop ● ● ●<br />
Max. ● ● ●<br />
Min. ● ● ●<br />
From E-pump to management system (SCADA)<br />
Fault indication ● ● ●<br />
Operating indication ● ● ●<br />
Actual control mode ● ● ●<br />
Actual head ● 3) ● 3) ●<br />
Actual power consumption<br />
● ● ●<br />
Operating hours ● ● ●<br />
Energy consumption ● ● ●<br />
Liquid temperature ● ● ●<br />
Speed [rpm] ● ● ●<br />
● Available.<br />
1) Control modes: Controlled or uncontrolled.<br />
2)<br />
Control modes: Proportional pressure, constant pressure or<br />
constant curve.<br />
3) Actual controlled value, depending on sensor type.<br />
57
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