Omron NB3Q-TW_B Startup Manual page 117

6 Maintenance and Troubleshooting
(b) [Tools] menu -> [Download Way] -> Whether the IP address and port number are same
(c) The IP address of PC and that of HMI are not set in the same network segment.
6
How to decide whether communications are normal or not through the internal addresses of the HMI
Decide which station breaks off through a bit;
Serial port 2: LW9432-9447, 16 words are equivalent to 256 bits, with each bit corresponding to
a PLC. No response = ON, Normal = OFF.
See the following diagram:
Assume that 3 S7-200 PLCs connect to the COM2 port of NB7W, the station numbers of which
are 2, 3, 4 respectively; if the PLCs with the station numbers 2 and 4 fail communication, the
internal registers LW.B9432.2 and LW.B9432.4 will turn ON automatically, as shown below:
6-28
as that in HMI settings. In HMI System Setting Mode, the network settings for HMI Unit
can be viewed. (For the operation method, please refer to 3-1 Installation in the NB
Series Setup Manual.)
NB-series Programmable Terminals Startup Guide Manual(V109)