C.2 MEMOBUS/Modbus Configuration C.2 MEMOBUS/Modbus Configuration Drives can be controlled from a PLC or other master device via serial communications after installing the interface for MEMOBUS/Modbus communication (SI-485/J). MEMOBUS/Modbus communication can be configured using one master (PLC) and a maximum of 255 slaves. The drive has slave functionality only, meaning that serial communication is normally initiated from the master and responded to by the slaves. The master performs serial communications with only one slave at a time. The address or node for each slave must be set beforehand so that the master can communicate with the slave at that address.
A slave that receives a command from the master will perform the specified function and then send a response back to the master. Master (PLC or other) DRIVE DRIVE DRIVE Figure C.1 Connecting Multiple Drives to a PLC MEMOBUS/Modbus Communications C SIEP C710606 33A OYMC AC Drive – J1000 User Manual 187