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Chapter 7 │ Communication Protocol 
7.1MODBUS communication specifications 
MODBUS communication specifications are: 
Parity check: even parity / odd parity / no 
7.2 Steps for communicating with the device/PLC/human interface 
7.2.1 Communication cable connection 
1.  Connect  the  communication  cable  between  the  device/PLC/human  interface  and  the  inverter 
with the power OFF. The connection terminal of the MODBUS communication cable is RJ45 port. 
 
■  Connect J1 or J4 (RJ45) via RS232/RS485 interface to PC, J1, J4 definition: 
 
■  The PC issues the command. If there is no reply or the Check Sum is incorrect, it indicates that 
there is a problem with the line or the J1 and J4 (RJ45) of the C/B are in poor contact.