5.2.2 Operation with Fieldbus (RS485)
The flow control driver can be operated with the fieldbus interface, which is an RS485 with Modbus RTU
protocol. Contact Levitronix
®
Technical Department (see Section 8) for detailed protocol specifications. The
RS485 interface can be used in connection with the USB interface of a PC and the Levitronix
®
Service
Software. Various accessory cables are available to connect to the RS485 of the drivers as illustrated in
Figure 5 for the EasyConnect model and Figure 7 for the OEM model.
5.2.3 Operation with User Panel LUI-B.1
The RS485 interface can also be used with the user panel LUI-B.1, which has the same menu functions as
the Stand-Alone model (described in Section 5.1). The relevant configurations are illustrated in Figure 7 for
the OEM and in Figure 5 for the EasyConnect driver models.
5.3 Zero Adjustment of Flow Sensor
5.3.1 Stand-Alone Model
Zero adjustment of the flow sensor can be done manually in the system menu functions as described in
Section 5.1.2. It is important to prepare the flow sensor as described in Section 4.6 and to assure that the
hydraulic circuit is filled completely and zero flow is assured.
5.3.2 EasyConnect and OEM Model
Zero adjustment of the flow sensor can be started with the relevant digital input of the PLC (see Table 15 for
OEM and Table 14 for EasyConnect model) or the RS485 interface of the drivers (see Section 5.2.2).
With the user panel LUI-B.1 zeroing can be done as for the Stand-Alone model (see Section 5.1.2).
It is important to prepare the flow sensor as described in Section 4.6 and to assure that the hydraulic circuit
is filled completely and zero flow is assured.
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