6-27
6 Maintenance and Troubleshooting
NB-series Programmable Terminals Startup Guide Manual(V109)
6-3 Troubleshooting
6
6-3-2 Communication-related Troubles
(e) Electromagnetic interference may affect the USB cable. Make sure the system is
grounded properly.
(f) USB is assigned to the printing function together with “Enable Printer Function” being
checked in the System Setting Mode. Please uncheck the “Enable Printer Function”
option and restart the NB. (For details, refer to Section 7 Pictbridge Printing in NB-
Designer Operation Manual.)
Downloading in the serial mode fails:
(a) [Tools] menu Æ [Transmission Setting] Æ [COM] is selected.
(b) Whether Port No. of the PC is correct;
(c) The serial port is occupied or problems arise to the PC serial port;
(d) The fabrication of the communication cable is incorrect or the bonding wire falls off;
(e) The communications cable is plugged incorrectly, and it should be plugged to the
COM1 port;
(f) The serial port of the PT fails (The serial port does not support hot plug, so take care
and avoid man-made damage).
Downloading in the Ethernet mode fails:
(a) [Tools] menu -> [Transmission Setting] -> Whether [Ethernet] is selected.
(b) [Tools] menu -> [Transmission Setting] -> Whether the IP address and port number are
same as that in PT settings. In PT System Setting Mode, the network settings for PT
Unit can be viewed. (For the operation method, please refer to the NB Series Setup
Manual (V107))
(c) Confirm the IP addresses of the PC and the PT are set in the same network segment.
If a project downloading fails after eliminating causes in the communications paths, perform the
following operations before downloading a project.
(a) Restart the NB Unit and the PC.
(b) Recompile a project.
(c) Update the kernel and Rootfs to the latest version. (Refer to 4-4 System Process in
NB-Series Programmable Terminals Operation Manual (V106) for details on the
updating method.)
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