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Serial Settings (Modbus RTU/ASCII)
Transmission mode - Selects Modbus RTU or Modbus ASCII. Modbus RTU is used
in all typical drive installations.
Slave Response Timeout - The time that the module will wait for a response from
the drive, before a Serial timeout will occur (default 1000 ms).
Physical Interface - RS-485, RS-232 or RS-232 D-sub. See the table for the correct
setting.
Selection
RS-485
RS-232
RS-232 (D-sub)
Baudrate - 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600 or 115200 bps.
Select the same baud rate that the drive is using. Usually the drives are configured
to communicate at 9600 bps.
Character Format - Select number of stop bits and if parity should be enabled (Odd,
Even). Eg, ACS350 and ACS/ACH550 are usually using No parity, 1 Stop Bit, and
ACS800 is usually configured to use Odd parity, 1 Stop Bit.
Extra delay between messages - time to wait between Modbus messages. Usually
extra delay is not needed, but some slow RS-232/RS-485 converters may cause
collisions that result in communication problems. In that case, you can try 20 ms or
even longer extra delays.
Character delimiter - Number of milliseconds between characters in the Modbus
frame. Set to zero to use standard Modbus (3.5 characters)
Force function code 15 when writing single coil - If this option is Enabled, all
writes to Modbus coil addresses will be done with function code 15. This is useful
only if drives do not support function code 05, so this option is not needed in the
typical drive installations.
Force function code 16 when writing single register - If this option is enabled, all
writes to Modbus register addresses will be done with function code 16. This is
useful only if drives do not support function code 06, so this option is not needed in
the typical drive installations.
Transparent Modbus settings (Modbus/TCP)
Transparent Modbus/TCP to Modbus RTU - This selection enables Modbus
gateway feature.
Port number - Which port to use for Modbus/TCP communication (502 by default).
Internal module registers via Modbus/TCP - The address to the gateway internal
registers (if enabled). See chapter
about the internal registers.
Setup pages
How to connect the drive(s)
If you have multiple drives connected by RS-485 interface of X1.
If you are using the RS-232 interface of X1.
If you are using the RS-232 interface of the connector X2 and the OPCA-02
cable with a 9-pin D-sub connector.
Appendix B: Internal Modbus registers
for details
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