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6 Important Product Information
GFK-1490C
transfers, the TCP connection is terminated. If an application is constructed so that it rapidly and repeatedly establishes
a channel with only one repetition (one transfer), the available TCP connections for the Ethernet Interface may be
totally exhausted.
Specifically, if your ladder program for issuing COMMREQs is constructed so it does the following, all available TCP
connections can quickly be used up: The number of repetitions (Word 9) in an Establish Read or Write Channel
COMMREQ is set to 1, and a new COMMREQ is issued repeatedly and immediately upon completion of the prior one.
It is recommended you use “Channel Re-tasking” to avoid exhausting TCP connections. Re-tasking is described in the
TCP/IP Ethernet Communications for the IC69* User’s Manual.
Documentation
Instructions for using the IC693CPU364 module can be found in the latest version of the following manuals:
General Configuration Instructions:
IC693 PLC Programming Software User’s Manual.
Ladder Logic Programming:
IC693 PLC Reference Manual.
Ethernet-Specific Instructions:
TCP/IP Ethernet Communications for the IC69* PLC User’s Manual. Also see the
TCP/IP Ethernet Communications for the IC69* Station Manager Manual