The rest of the bits of the command word is programmed as seen fit. Profile as I/O profile allows the first bit in the command word register 8501 to be a run forward. The controlling PLC will require appropriate programming to ensure that the correct sequence of instructions is sent to the ATV61/71 to achieve the required functionality. This completes the configuration changes required within the ATV61/71 to implement modbus control. Only the command is via Modbus:ĬtL Command menu => Reference 1 configuration: Fr1 is selected from the following options ĬtL Command menu => Cd1: Configuration of command channel = Mdb Command via Modbus network The command channel is separate from the reference channel. The speed reference is sent via modbus, control can be via the terminals, display terminal, etc.ĬtL Command menu => Reference 1 configuration: Fr1 = Mdb: Reference via Modbus.ĬtL Command menu => Mixed mode: profile SEP: Profile separate.ĬtL Command menu => Cd1: Command channel 1: Configuration of command channel is selected from the following These two items can be separated in terms of how they are programmed in the Command menu, as shown in the following examples īoth the command and reference come from the Modbus communication channel.ĬtL Command menu => Reference 1 configuration: Fr1 = Reference via Modbus.ĬtL Command menu => Profile not separate. The Command channel is the channel which provides the ATV61/71 with signals to start and stop, the Reference channel provides the motor speed reference. Next, configure the command and reference channels. Please note that these settings are not stored until the ATV61/71 power supply is switched off and on again. Parameter TTO is the modbus timeout value adjustable from. Parameter TFO (Modbus format) is adjustable from 8-odd-1, 8-even-1, 8-neutral-1, and 8-netural-2.ĨO1 = 8 data bits, odd parity, 1 stop bitĨE1 = 8 data bits, even parity, 1 stop bit Parameter TBR (Modbus baud rate) is adjustable from 4.8-38400 bauds.
Parameter Add (Modbus Address) is adjustable between OFF to 247. In the ATV61/71 Communications menu, go into MODBUS NETWORK submenu. PLC type Schneider MODBUS RTU PLC I/F RS485 RS232/RS485 Baud rate 9600 9600115200 Data bits 8 7,8 Parity Even Even, Odd, None Stop bits 1 1,2 PLC sta. To control the ATV61/71 via the Modbus RTU communication channel, it is first necessary to configure the modbus communication parameters. Control an ATV61/71 via the Modbus channel.
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