Metso Automation MAX Controls
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Contents
PREFACE ........................................................................................................................... III
CHAPTER 1 ...................................................................................................................... 1-1
DPU Bus Basics, an Introduction............................................................................................................................... 1-1
Overview................................................................................................................................................................... 1-1
Three DPU Bus Networking Approaches ............................................................................................................. 1-3
Fiber Optic Ring Network ................................................................................................................................. 1-4
Wrap-Back OEI Network.................................................................................................................................. 1-4
Electrical-Only Network ................................................................................................................................... 1-4
Understanding OEIs .............................................................................................................................................. 1-5
Station Categories ................................................................................................................................................. 1-8
System Monitor Functionality ........................................................................................................................... 1-8
DPU Bus Traffic Loops and Station Addresses .................................................................................................... 1-8
Token Passing and DPU Bus Mastership ............................................................................................................ 1-10
Stallout ............................................................................................................................................................ 1-11
Go-Ahead Pointers and Station Addresses ...................................................................................................... 1-12
IGAP and UGAP Procedures .......................................................................................................................... 1-12
Performing an IGAP........................................................................................................................................ 1-13
Performing a UGAP (unigap).......................................................................................................................... 1-13
CHAPTER 2 ...................................................................................................................... 2-1
Verifying DPU Bus Performance............................................................................................................................... 2-1
Overview................................................................................................................................................................... 2-1
Ideal Verification Conditions ............................................................................................................................ 2-1
Verification Procedure Overview...................................................................................................................... 2-2
Beginning Verification Procedure......................................................................................................................... 2-2
DPU Bus Maintenance .......................................................................................................................................... 2-4
CHAPTER 3 ...................................................................................................................... 3-1
Using maxVUE Runtime Troubleshooting Displays ................................................................................................ 3-1
Overview................................................................................................................................................................... 3-1
Using the System Status Display........................................................................................................................... 3-1
maxNET Status ................................................................................................................................................. 3-2
DPU Bus Cable Status....................................................................................................................................... 3-2
Token Pass Rate ................................................................................................................................................ 3-2
Using the DPU Bus Map Display.......................................................................................................................... 3-2
Using IGAP, UGAP Buttons, etc. ..................................................................................................................... 3-4
Using the DPU Bus Statistics Display................................................................................................................... 3-5
