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7
4. Hardware setup
4. 4. Switch coding
b Choosing polarization
Normal setting for a Modbus bus:
• No polarization at drive level
Special setting (see "Creating a Modbus bus using non-standard equipment" on page 44
):
• 4.7 k
Ω RS485 line polarization at drive level
b Coding the address
The address switches are used to encode the address (1 to 247) of the drive on the bus.
The switch settings can only be changed when the drive is turned off.
The correspondence between the value and the position of the switch is as follows:
• 0 = OFF = Switch in upper position
• 1 = ON = Switch in lower position
The address is binary-coded.
Examples:
Address 11 = 2#0000 1011
Address 34 = 2#0010 0010