Omron SYSDRIVE 3G3FV User Manual page 353

Maintenance Operations
Minor fault display
E-15
SI-F/G Com Err
BUS
Option Com Err
Meaning
SYSMAC BUS
communications error.
An error occurred in the
SYSMAC BUS
communications line,
disrupting communications.
CompoBus/D communications
error.
Communications error
occurred in the CompoBus/D
Communications Card.
Probable causes and remedies
The communications line was broken, short-cir-
cuited, or wired in reverse.
Check the communications line and correct the
trouble.
Hardware on the Master end is faulty.
Check the Master and take necessary mea-
sures.
Communications data was damaged due to noise.
Use twisted-pair cables for communications
lines and ground all the shields on the Master
end.
The Optional Card was damaged.
If wiring is correct and if the problem persists,
replace the Optional Card.
Communications cable was broken, short-cir-
cuited, or wired incorrectly.
Check wiring of communications cables and
correct the fault.
Hardware on the Master end is faulty.
Check the Master and take necessary mea-
sures.
Data was damaged due to noise.
Change to special communications cables or
shielded cables and ground the shields on the
Master end or power supply end.
Separate communications cables from other
lines and install a noise filter on the power sup-
ply.
The Optional Card was damaged.
If wiring is correct and if the problem persists,
replace the Optional Card.
Chapter 8
8-11