Procedure for connection to a monitoring system

Connect all the units of the RS485 chain in accordance with the “daisychain” arrangement (“in-out”) observing the correspondence between signals, and activate the termination resistance of the communication line in the last element of the chain by switching switch 15 (to ON position).

UNO

15

= ON

S2 OFF ON

120 TERM.

UNO

15

= OFF 15

UNO

15

= OFF Monitor

If a single inverter is connected to the monitoring system, activate the termination resistance of the communication line by switching switch 15 (to ON position). Set a different RS485 address on each inverter of the chain. No inverter should have “Auto” as its address. An address can be chosen freely from out of 2 to 63. The address on the inverter is set through the display and the pushbutton panel (see relevant chapter).

We recommend not exceeding a length of 1000m for the communication line. No more than 62 inverters can be connected to the same RS485 line.

When using an RS-485 connection, if one or more inverters are added later to the system, you must remember to return to OFF position the switch of the termination resistance used of the inverter that was previously the last one of the system. Each inverter is dispatched with two (2) as the predefined RS485 address and with switch for setting termination resistance 15 to OFF position.