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Responding to Displayed Error Messages Section 7-2
7-2-3 Errors Occurring on Screen Data Initialization and Transmission
The table below shows the errors that can occur when the NT631/NT631C
data is initialized, and during data setting and transmission, and their reme-
dies.
7-2-4 Errors in the System Installer Mode and Their Remedies
This section describes the errors that may occur in the System Installer mode
of the NT631/NT631C, and the remedies for these errors.
Message Cause Remedy
[Flash Memory Error]
Flash Memory I/O Error.
If this happens frequently, Flash
Memory may be broken.
Press Reset Switch to restart.
There is a hardware fault, or the
flash memory (memory for storing
screen data) has reached the end
of its service life.
If the same message is displayed even after
clearing the screen data or transmitting screen
data several times, contact your OMRON service
center.
[Calendar Data Error]
Calendar Data is incorrect.
Set to the MAINTENANCE MODE
and set Calendar Data.
Hardware fault, or system pro-
gram error
Set the calendar clock again from the System
Menu. If the problem recurs, delete the program
in the System Installer mode, then re-install the
program. (6-5-2 Clearing/Installing the System
Program, page 145)
If this does not solve the problem, contact your
OMRON service center.
[Tool Transmit Error]
∗∗∗∗ Error detected while down-
loading by the following case:
• faulty connecting cable.
• corrupted data by noise.
The connecting cable is defective. Check the cable connection and perform a con-
ductivity test. If there is a fault, replace the cable.
(Appendix F Making the Cable for Connecting a
PLC)
Malfunction due to external noise Carry out grounding work in accordance with the
conditions by referring to 3-1-4 Grounding,
page 34.
[Tool Transmit Error]
Check Sum Error occurs while
downloading by the following
case:
• corrupted data by noise.
Malfunction due to external noise Carry out grounding work in accordance with the
conditions by referring to 3-1-4 Grounding,
page 34.
[Tool Transmit Error]
Time-out Error occurs while down-
loading by the following case:
• faulty connecting cable.
The connecting cable is defective. Check the cable connection and perform a con-
ductivity test. If there is a fault, replace the cable.
[Tool Transmit Error]
Reception was failed by Buffer
Over Flow Error.
The receive buffer has overflowed. Retransmit the data from the Support Tool.
Message Cause Remedy
System Program not exist or
incorrect.
- The system program has not
been installed.
- The system program has been
deleted due to a hardware fault,
or because the flash memory
(memory for storing the system
program) has reached its life.
Select Download System Program and download
the system program (6-5-2 Clearing/Installing the
System Program, page 145)
If this does not solve the problem, contact your
OMRON service center.
Unable to erase System Program. Hardware fault, or flash memory
(memory for storing the system
program) has reached its life.
If the same message is displayed on repeating
selection of Download System Program and
attempting to delete the system program several
times, contact your OMRON service center (6-5-2
Clearing/Installing the System Program,
page 145)