Omron NT21 User Manual

6-2SectionResponding to Displayed Error Messages
427
The remedies to take in accordance with the displayed cause are indicated in the
table below.
Error Details Displayed Probable Cause Remedy
Parity Error
Framing Error
Over
-
run Error
Communication parameters/
conditions set incorrectly.
Check if the settings at the host for parity bit, frame
length, baud rate, stop bit length and flow control
agree with those at the PT.
O
ver-run
E
rror
The connecting cables are not
connected correctly.
Check the communication cable connection and
perform a conductivity test. If there is a fault,
replace the cable. For details on communication
cables, refer to section 4 and section 5 in the Setup
Manual.
Noise caused data corruption during
communication.
Carry out grounding work in accordance with the
conditions. (Refer to Grounding in section 3 in the
Setup Manual.)
FCS (Checksum) Error Noise caused data corruption during
communication.
Carry out grounding work in accordance with the
conditions. (Refer to Grounding in section 3 in the
Setup Manual.)
The PC is transmitting incorrect
data.
Check the operation at the host side.
Time-out Error The connecting cables are not
connected correctly. (Send/Receive)
Check the communication cable connection and
perform a conductivity test. If there is a fault,
replace the cable.
For details on communication cables, refer to
section 4 and section 5 in the Setup Manual.
The communication service of the
host is stopped. (Send/Receive)
Check that the host is capable of communicating
with the PT (confirm that the communication
settings of the host and PT match).
Time-out Interval is too short. (Send) Set a longer value for Time-out Interval at the host
side.
Time-out Interval is too short.
(Receive)
Set a longer value for Time-out Interval in the
System Menu. (Refer to Setting the Time-out
Interval in section 6 in the Setup Manual.) It may
also be possible to solve the problem by shortening
the host cycle time.
PC Unit No. Error The unit # does not match that set
on the PC.
Re-set the unit number at the host side to 0.
Noise caused data corruption during
communication.
Carry out grounding work in accordance with the
conditions. (Refer to Grounding in section 3 in the
Setup Manual.)
NAK received —— Check the settings for allocated words and bits.
If noise is a possible factor, distance the cable from
sources of noise and insert a noise filter in the
power supply line.
If using the equipment in a location subject to a lot
of noise, use a cable with a high degree of
protection against noise for the transmission route.
Also make the cable as short as possible.
Undefined Command
E
The host is not supported. Check the PC model used for the host.
Error
Command level 3 is not effective. Check that the command level setting for the host is
level 1, 2, 3.
Data Over Flow Error Communication command from the
host is too long.
(With memory link)
Set flow control method in the host.
Increase transmission interval.
Command transmission to the host
is not possible.
Check the communication cable.
Check the control method at the PT and the host.
Increase the baud rate when it is too slow.
Probable Causes and
Remedies

Omron NT21 Specifications

General

Brand	Omron
Model	NT21
Category	Touch terminals
Language	English