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18. TROUBLESHOOTING
18.1 GOT Restoration Sheet
18 - 7
17
MAINTENANCE AND
INSPECTION
18
TROUBLESHOOTING
APPENDICES
(5) Grounding status
Current status
The FG cables of the control
equipment (such as PLC) and the
power equipment (such as servo
amplifier) are connected as shown
by "a".
Connected
Not
connected
Measure for
the FG cables
connected
Fig. A
Perform independent grounding at
two places as shown in Fig. A.
Independent grounding can reduce
the influence of noise.
If independent grounding is not
allowed, be sure to perform shared
grounding as shown in Fig. B.
Effective
Ineffective
Fig. B
GOT
FG
Connection cable
Panel grounding
Panel grounding
FG
FG
CN1BCN1A
CN3CN2
LG
a
PLC
Servo
GOT
FG
Connection cable
Panel grounding
Grounding for
power system
Grounding for
power system
Terminal block
Terminal block
Panel
grounding
FG
FG
CN1BCN1A
CN3CN2
LG
PLCServo
GOT
FG
Connection cable
Panel grounding
Panel grounding
FG
FG
CN1BCN1A
CN3CN2
LG
PLCServo