Omron CS1W-ETN21 - Manual (Page 254)

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Results Storage Area Response Codes Section 8-6
0081 (None) Closed by close command during
socket servicing No action is necessarily called for.
0082 (None) Connection with remote node not
achieved for passive TCP open
request The remote IP address and TCP port number
settings differ from those of the remote socket
(active side).
Response
code
UNIX error
message
Description Probable remedy