Lincoln Electric IM839 DEVICENET MODULE - Manual (Page 16)

B-3 TROUBLESHOOTING B-3
DEVICENET MODULE
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
Device goes off line during welding
1. Current Interference
2. Termination
3. Shield
4. Power Supply
5. Expected Packet Rate
1. Verify that cables are not run
along current carrying conductors.
This would include the welding
cables.
2. Verify that the DeviceNet bus is
terminated correctly.
3. Verify that the cable shielding is
correctly grounded at the bus
power supply. The shield should
be tied into the bus ground at only
one point.
4. Verify that the power supply can
supply more than enough current
for the devices in the network.
5. Verify that 1000/(Expected Packet
Rate)
≤
(scans per seconds). The
Monitor section of the Observer
application displays these values.
For more trouble shooting of a DeviceNet network the following references should be used.
Allen-Bradley Cat. Num. DN-6.7.2
Rockwell Automation Document 8842
ODVA web site (www.odva.org)