Yaskawa SmartTrac Ethernet Card - Manual (Page 25)

SMART TRAC Ethernet Card
Technical Manual Smart Trac Ethernet Card Troubleshooting Your Smart Trac Ethernet Card
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Troubleshooting Your Smart
Trac Ethernet Card
Status and Error Messages
When installed, the Smart Trac Ethernet driver automatically creates a set of
global
These global variables may be assigned symbol names and used in function
blocks, application programs and/or the fault manager. If read by the fault
manager, they may be programmed to annunciate and/or to be displayed on the
Digital Operator as they occur.
Troubleshooting Ethernet Network
Problems
Use the following general guidelines to troubleshoot your Ethernet network:
1. Disconnect parts of the network and watch where the fault goes.
Disconnecting part of the network frequently solves the problem.
2. If the network was previously operating, determine what has changed.
3. Record symptoms in detail. Keep good notes about your network and
its problems to properly define the problem.
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Look for patterns in the symptoms. Do intermittent problems occur
when other un-related equipment is in use?
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Do some nodes communicate correctly? What is the difference
between the functioning nodes and the others?