parameter descriptions vacon • 9124-hour support +358 (0) 201 212 575 • Email: vacon@vacon.com99.13 Modbus RTUVacon 10 has a built-in Modbus RTU bus interface. The signal level of the interfaceis in accordance with the RS-485 standard.The built-in Modbus connection of Vacon 10 supports the following function codes:9.13.1 Termination resistorThe RS-485 bus is terminated with termination resistors of 120 ohms in both ends.Vacon 10 has a built-in termination resistor which is switched off as a default (pre-sented below). The termination resistor can be switched on and off with the righthand dip switch located above IO-terminals in the front of the drive (see below).Figure 9.20: Vacon 10 I/O9.13.2 Modbus address areaThe Modbus interface of Vacon 10 uses the ID numbers of the application parametersas addresses. The ID numbers can be found in the parameter tables in chapter 8.When several parameters / monitoring values are read at a time, they must be con-secutive. 11 addresses can be read and the addresses can be parameters or moni-toring values.Functioncode Function name Address Broadcastmessages03 Read Holding Registers All ID numbers No04 Read Input Registers All ID numbers No06 Write Single Registers All ID numbers Yes16 Write multiple registers All ID numbers YesTable 9.3: Modbus RTUONOFF
