Cal Amp VIPER SC+ 100 series, User Manual

Page: 10 / 206

Viper SC +™ IP Router for Licensed Spectrum PN 001-5008-000 Rev. C | Page viii
Messaging with TCP and TCP Connection Timeout ...................................................................................................... 181
Opening a new connection while previous TCP Connection Is Still In Progress ........................................................... 181
Closing Old TCP Connection .......................................................................................................................................... 182
Sending Fragmented Messages .................................................................................................................................... 182
Heartbeat Messages ..................................................................................................................................................... 182
Avoid Unnecessary Traffic Over The Air Network......................................................................................................... 183
Monitoring Remote PLCs with Monitoring Application Tools ................................................................................ 183
Remote Alive Check ................................................................................................................................................. 183
Messaging with TCP – Opening and Closing TCP Connection for Each Poll .................................................................. 183
Safe Ladder Logic – Suggestion ..................................................................................................................................... 183
PLC Ladder Logic On Restart Opens All Connections At Once Instead Of Sequentially ................................................ 184
Viper General Setup With PLCs ..................................................................................................................................... 184
Set Up Viper In Router Mode Instead of Bridge Mode ................................................................................................. 184
Filtering TCP Keep-Alive With Viper TCP Proxy Mode .................................................................................................. 184
Replacing Or Resetting A Viper Using Proxy Mode Without Restarting Polling ........................................................... 184
Allen-Bradley PLC for Viper System .............................................................................................................................. 184
Allen-Bradley Micrologix 1100 or 1400 (may also apply to SLC 5) ................................................................................ 185
PLC Ladder Logic On Restart Opens All Connections At Once Instead Of Sequentially ......................................... 185
PLC Sends Too Many “CIP Forward Open” and “CIP Forward Close” Messages .................................................... 185
More about Message Reply Timeout ...................................................................................................................... 186
PLC Sends Many TCP/IP Keep-Alive Messages ........................................................................................................ 186
PLC Reopens TCP/IP Connection With the Same Source Port ................................................................................ 187
PLC Detecting Communication Failure While Viper TCP/IP Filters Keep-Alives ..................................................... 187
Allen-Bradley MicroLogix firmware overview at the time of writing this document ............................................ 187
Allen-Bradley ControlLogix and CompactLogics PLC for Viper System ......................................................................... 188
Allen Bradley CompactLogix and ControlLogix PLCs ..................................................................................................... 188
PLC Ladder Logic On Restart Opens All Connections At Once Instead Of Sequentially ......................................... 188
Allen-Bradley CompactLogix and ControlLogix Series PLCs Ethernet IP Connection Timeout (Setting Timeout Too
Short Can Cause Problems!)
.................................................................................................................................... 188
Overriding the Default Inactivity Timeout —Not Recommended Unless Required .............................................. 189
Summary On TCP Connection Timeout (Inactivity Setting) .................................................................................... 190
Allen-Bradley CompactLogix or ControlLogix Series PLCs Sends Too Many CIP Forward Open and CIP Forward Close
........................................................................................................................................................................... 190
Connected or Unconnected operation description for CIP ..................................................................................... 190
When Communication Is Between ControlLogix or CompactLogix And Other –Logix Series PLCs ....................... 191
When Communication Is Between ControlLogix or CompactLogix and other –Logix Series PLCs. ....................... 192
Summary of Connected or Unconnected Operation ............................................................................................... 193
Allen-Bradley CompactLogix or ControlLogix series PLCs Send Many TCP/IP Keep-Alive Messages ............................ 193
APPENDIX K – Service And Support And Warranty Statement......................................................... 194
Warranty Statement ..................................................................................................................................................... 195