MD280/MD280N User Manual                              Fault Diagnosis and Countermeasures             
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Err16
If the host computer is working 
If the RS485 communication 
cable connection is normal
If the baud rate setting is correct 
Check the host computer 
cable connection 
Check the cable for
communications 
Set the baud rate correctly 
Communications fault 
Yes
No
If the communication parameters 
are set correctly 
Modify the communication 
parameters 
Ask for technical 
support 
Yes
Yes
Yes
No
No
No
 
 
Fig.8-14 Communication fault (ERR16)   
 
 
Err16
Check if the 24 V power 
supply contactor is normal
Ask for technical support
Replace the contactor
 Contacor pull-in fault
No
Yes
 
Fig. 8-15 Contacor pull-in fault   
 
 
 
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