V020-E3-2 Omron, V020-E3-2 Datasheet - Page 255

• Manufacturer Part Number: V020-E3-2
• Description: Publications, Books
• Manufacturer: Omron

Specifications of V020-E3-2

• Lead Free Status / RoHS Status: na

7-3
Spare PT
Backlight
Maintenance of the NT20S
(ACIA)
Parity Error
Framing Error
Framing Error
Overflow Error
Overrun
Overrun
Buffer Overflow
Time Out
NAK Received
(end code simultaneously
displayed)
Unit No. Error
FCS Error
Message
Maintenance of the NT20S
WARNING: Do not attempt to take the PC apart and do not touch any internal parts while the
Communication parameters/
conditions of communications set
incorrectly.
Noise caused data corruption during
communication.
The connectors of the connecting
cable are not connected correctly.
The NT20S receive buffer is full.
The connectors of the connecting
cable have become disconnected.
The PC is stopped.
During transmission of one
command a time lapse exceeding 5
command, a time lapse exceeding 5
seconds is detected.
Noise caused data corruption during
communication.
The unit # does not match that set on
the PC.
The PC is transmitting incorrect data. Check PC operation.
Noise caused data corruption during
communication.
The PC is transmitting incorrect data. Check PC operation.
Noise caused data corruption during
communication.
Carry out maintenance work in order to ensure that the NT20S is always used in its
optimum condition.
power is being supplied. Doing either of these may result in electrical shock.
It is advisable to have a spare NT20S available to minimize system downtime in
the event of an NT20S failure or if the screen display becomes difficult to read due
to deterioration of the display unit.
When the backlight in the display is getting dim and the screen cannot be read eas-
ily, replace the backlight. The backlight can be replaced at the rear of the NT20S
while it is mounted in an operation panel.
S Replaceable Backlight Model
NT20S-CFL01
Cause
Check whether the parity bit, frame length, baud rate,
stop bit length, and flow control settings of the PC
match the settings of the NT20S.
Use a noise-resistant cable if communication occurs
in an environment with high levels of noise.
Reconnect the cable.
Lengthen the command transmission intervals. If this
error occurs frequently, set flow control for
communications.
Reconnect the cable.
Make sure the PC is able to communicate with the
NT20S.
Confirm the proper command length.
Reconnect the cable.
Use a noise-resistant cable if communication occurs
in an environment with high levels of noise.
Check the end code by referring to the PC user’s
manual.
Set the PC unit # to “0”.
Use a noise-resistant cable if communication occurs
in an environment with high levels of noise.
Use a noise-resistant cable if communication occurs
in an environment with high levels of noise.
Remedy
Section 7-3
239