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Installation status
■Current status
Check if the FG cables of the control equipment (such as a PLC) and the power equipment (such as a servo amplifier) are
connected as shown in "a" of the following figure.
PLC
Servo amplifier
CN1A
CN1B
FG
LG
CN2
CN3
FG
a
Panel grounding
■Measure when a single ground cable is led
Perform independent grounding at two places as shown in Figure A.
The independent grounding reduces the influence of noise.
When independent grounding is unavailable, perform shared grounding as shown in Figure B.
Figure A
PLC
Servo amplifier
CN1A
CN1B
FG
LG
CN2
CN3
FG
Terminal
Panel grounding
block
Grounding for power system
11 TROUBLESHOOTING
112
11.1 GOT Restoration Sheets
Connection cable
GOT
FG
Panel grounding
Connection cable
GOT
FG
Terminal block
Grounding for
control system
Panel grounding
Grounding for power system
Check result
□ Applicable
□ Not applicable
Figure B
PLC
Servo amplifier
CN1A
CN1B
FG
LG
CN2
CN3
FG
Panel grounding
Connection cable
GOT
FG
Panel grounding
Effect
□ Effective
□ Ineffective
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Troubleshooting
