YASKAWA Z1000U Technical Manual page 352

D.1 MEMOBUS/Modbus Configuration
D.1 MEMOBUS/Modbus Configuration
Bypasses can be controlled from a PLC or other master device via serial communications using the MEMOBUS/Modbus
protocol.
MEMOBUS/Modbus communications can be configured using one master (PLC) and up to 31 slaves. The bypass has slave
functionality only, and 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.
352
Master (PLC or other)
Figure D.1 Connecting Multiple Bypasses to a PLC
Z1000U
Bypass
Slaves
YASKAWA SIEP YAIZ1D 01C Z1000U HVAC MATRIX Drive Bypass Technical Manual