NT631C-ST153B-EV3 Omron, NT631C-ST153B-EV3 Datasheet - Page 251

• Manufacturer Part Number: NT631C-ST153B-EV3
• Description: 10.48-ColrDisplay,TFT,Blk,Eng
• Manufacturer: Omron

Specifications of NT631C-ST153B-EV3

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Responding to Displayed Error Messages
Probable Causes and
Remedies
234
Parity Error
Framing Error
Over-run Error
FCS (Check Sum) Error
Time-out Error
PLC Unit No. Error
Error Details
Communications parameters/
conditions set incorrectly.
The connecting cables are not con-
nected correctly.
Noise caused data corruption during
communications.
Noise caused data corruption during
communications.
The PLC is transmitting incorrect
data.
The connecting cables are not con-
nected correctly. (Send/Receive)
The communications service of the
host is stopped. (Send/Receive)
Time-out Interval is too short. (Send)
Time-out Interval is too short.
(Receive)
The unit # does not match that set on
the PLC.
Noise caused data corruption during
communications.
Displayed Probable Cause
Send Errors
The following errors can occur when receiving data.
The remedies to take in accordance with the displayed cause are indicated in
the table below.
• Overrun error
• FCS (sum value) error
• Time out error
• Data over flow error
• PLC unit No. error (Host Link only)
• NAK received (in the case of the Host Link, the end code is also dis-
• Undefined command error
• Time out error
• Data over flow error
played)
Check if the settings at the host for parity bit, frame
length, communications speed, stop bit length and
flow control agree with those at the NT631/NT631C.
Check the communications cable connection and
perform a conductivity test. If there is a fault, replace
the cable. For details on communications cables,
refer to SECTION 4 Connecting to the Host from the
RS-232C Port, and SECTION 5 Connecting to the
Host from the RS-422A/485 Port.
Carry out grounding work in accordance with the
conditions by referring to 3-1-4 Grounding, page 34.
Carry out grounding work in accordance with the
conditions by referring to 3-1-4 Grounding, page 34.
Check the operation at the host side.
Check the communications cable connection and
perform a conductivity test. If there is a fault, replace
the cable. For details on communications cables,
refer to SECTION 4 Connecting to the Host from the
RS-232C Port, and SECTION 5 Connecting to the
Host from the RS-422A/485 Port.
Check that the host is capable of communicating with
the NT631/NT631C (confirm that the communica-
tions settings of the host and NT631/NT631C match).
Set a longer value for Time-out Interval at the host
side.
Set a longer value for Time-out Interval in the System
Menu. (6-9-12 Setting the Time-out Interval,
page 181) It may also be possible to solve the prob-
lem by shortening the host cycle time.
Re-set the unit number at the host side to 0.
Carry out grounding work in accordance with the
conditions by referring to 3-1-4 Grounding, page 34.
Remedy
Section 7-2