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252
Responding to Displayed Error Messages
Section 7-2
Time Out
The connectors of the con-
necting cable have become
disconnected.
Reconnect the cable.
The PLC is stopped.
Make sure the PLC is able to
communicate with the NT20.
During transmission of one
command, a time lapse
exceeding 5 seconds is
detected.
Confirm the proper command
length.
Reconnect the cable.
NAK Received
(end code simulta-
neously displayed)
Noise caused data corruption
during communications.
Use a noise-resistant cable if
communications occurs in an
environment with high levels
of noise.
Error returned by host.
Check the end code by refer-
ring to the PLC operation
manual.
Unit No. Error
The unit # does not match that
set on the PLC.
Set the PLC unit # to “0”.
The PLC is transmitting incor-
rect data.
Check PLC operation.
Noise caused data corruption
during communications.
Use a noise-resistant cable if
communications occurs in an
environment with high levels
of noise.
FCS Error
The PLC is transmitting incor-
rect data.
Check PLC operation.
Noise caused data corruption
during communications.
Use a noise-resistant cable if
communications occurs in an
environment with high levels
of noise.
Message
Cause
Remedy
Summary of Contents for NT20
Page 1: ...Programmable Terminal Cat No V091 E1 01 NT20 USER S MANUAL ...
Page 2: ...NT series Programmable Terminal User s Manual Produced March 2007 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 9: ...x TABLE OF CONTENTS ...
Page 15: ...xvi ...
Page 21: ...xxii EC Directives 6 ...
Page 37: ...16 Before Operating Section 1 6 ...
Page 153: ...132 Transferring the Resource Data Section 3 11 ...
Page 185: ...164 Numeral Setting Section 4 8 ...
Page 267: ...246 Key to Programs Section 6 8 ...
Page 281: ...260 Specifications Appendix A ...
Page 285: ...264 Transporting and Storing PTs Appendix C ...
Page 303: ...282 Function Restrictions Depending on the Support Tool Appendix I ...
Page 307: ...286 Index ...
Page 309: ...288 Revision History ...