SUNWAY M XS 7500TL
INSTALLATION AND
PROGRAMMING INSTRUCTIONS
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5.1.2. Direct Linking
If a direct linking configuration is chosen, the electrical standard RS485 may be used provided that the PC is
equipped with a RS485 port. If the PC is equipped only with a serial RS232-C port or a USB port, as it
typically is, a RS232-C/RS485 converter or a USB/RS485 converter is required.
Logic ‘1’ (usually called a ‘MARK’) means that terminal TX/RX A is positive in respect to terminal TX/RX B
(vice-versa for logic ‘0’, usually called a ‘SPACE’).
5.1.3. Multidrop Connection
The electrical standard RS485 allows the SUNWAY M XS to be connected to a network of inverters, under a
multidrop configuration to which the single devices are linked. Up to 247 inverters may be interconnected
depending on the link length and transmission rate.
The connection limit of the line drives is actually of 30 devices. If more than 30 devices are to be connected
to the same line, or if the line length exceeds 500 m, the line should be broken up into smaller segments
using RS485 repeaters.
Each inverter has its own ID number that identifies it univocally in the network mastered by the PC. The ID
number can be set from the touchscreen display (see parameter
R001 – Inverter Modbus Address
in Table
13).
Figure 78: Multidrop network with RS485 connectors
NOTE
The “generic device” in Figure 78 may be a SUNWAY M XS inverter or an
ambient sensor (e.g. DATELEX 3017 or 3148).