7-3 Troubleshooting and Maintenance 
7-3  Troubleshooting and Maintenance  
 
When an error occurs while operating the PT, search for the symptom in the following table 
and take measures according to those provided. 
Errors during Data Transfer  
Symptoms at 
PT 
Causes   Measures  
The CX-Designer is 
not connected to 
the PT.  
Check the wiring conditions of the connecting cable.  
(Refer to 3-3 Connecting the CX-Designer.) 
Serial transfer 
not possible 
between CX-
Designer and 
PT.  
The Expansion In-
terface for serial 
port B is set to the 
expansion interface 
(NS5 only). 
Set the Expansion Interface to Disable on the Comm Tab 
Page from the NS5 System Menu.  
The installed PT 
system is using 
system program 
lower than Ver. 6.2. 
Install system program Ver. 6.2 or higher in the PT. 
The PT has a lot 
number earlier than 
that indicated in 3-
3-2 Connecting via 
USB. 
Use a PT from the lot number (or later) indicated in 3-3-2 
Connecting via USB. 
The USB cable is 
longer than 2 m. 
To use a cable longer than 2 m, connect a USB Hub be-
tween the PT and personal computer as shown in Connec-
tion Methods  under in 3-3-2 Connecting via USB. 
Personal 
computer can-
not detect PT 
when con-
nected via 
USB. 
A malfunction has 
occurred due to 
external noise. 
Configure the USB Hub and wire the USB cables taking 
measures to prevent noise. 
The USB cable is 
longer than 2 m. 
To use a cable longer than 2 m, connect a USB Hub be-
tween the PT and personal computer as shown in Connec-
tion Methods  under in 3-3-2 Connecting via USB. 
Timeout oc-
curs during 
screen trans-
fer using USB. 
A malfunction has 
occurred due to 
external noise. 
Configure the USB Hub and wire the USB cables taking 
measures to prevent noise. 
Errors during PT Startup  
Symptoms at 
PT  
Causes   Measures  
Power is not being 
supplied to the PT.  
Check the connection points and supply power to the PT 
correctly.  (Refer to 3-1 Installing the PT.)  
The fuse is broken.  The PT needs repair. Contact your nearest OMRON 
representative.  
Indicators do 
not light.  
The system  
program is cor-
rupted (fatal error). 
The PT may be faulty. Contact your nearest OMRON repre-
sentative.  
The indicator 
is lit orange 
and the screen 
is blank. 
The system  
program is  
corrupted (fatal 
error).  
The PT may be faulty. Contact your nearest OMRON repre-
sentative.  
7-6