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GFKĆ1084B TCP/IP Ethernet Communications User's Manual Ć August 1997
Section 2: The COMMREQ Function Block and Command Block 3Ć6
The COMMREQ Function Block 3Ć6.....................................
The COMMREQ Command Block 3Ć7...................................
Section 3: Channel Commands 3Ć9.............................
Establishing a Channel 3Ć9..........................................
Aborting and ReĆtasking a Channel 3Ć9...............................
Retrieving Detailed Status on the Channel 3Ć10.........................
Specifying a Network Address 3Ć10....................................
Establish Read Channel (2003) 3Ć11.......................................
Establish Write Channel (2004) 3Ć18......................................
Send Information Report (2010) 3Ć24.....................................
Abort Channel (2001) 3Ć29...............................................
Retrieve Detailed Channel Status (2002) 3Ć30..............................
Section 4: Status Data 3Ć32.....................................
Types of Status Data 3Ć32...............................................
Description of the Status Data 3Ć33.......................................
OK Output of the COMMREQ Function Block 3Ć33......................
FT Output of the COMMREQ Function Block 3Ć33......................
Status Bits 3Ć33.....................................................
Communications Status Words 3Ć36...................................
Minor Error Codes 3Ć38.................................................
Section 5: Controlling Communications in the Ladder Program 3Ć41.
Essential Elements of the Ladder Program 3Ć41............................
Troubleshooting Your Ladder Program 3Ć44...............................
Monitoring the Communications Channel 3Ć45............................
Sequencing Communications Requests 3Ć46...............................
Data Transfers with One Repetition 3Ć46..................................
Chapter 4 Troubleshooting 4Ć1...........................................
Diagnostic Tools Available for Troubleshooting 4Ć1.........................
What to do if you Cannot Solve the Problem 4Ć2..........................
PLC Fault Table 4Ć2....................................................
Appendix A Glossary AĆ1..................................................
Commonly Used Acronyms and Abbreviations AĆ1........................
Glossary of Terms AĆ2..................................................