Epson RC620 Manual page 203
Robot controller option, fieldbus i/o
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Also See for RC620:
- Safety and installation (218 pages) ,
- Manual (2 pages) ,
- Mounting procedure (2 pages)
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Countermeasure 1: Improve FG.
Countermeasure 2: Disconnect the FG wire to isolate it from the ground.
When noise intrudes the ground line due to a noise source such as an inverter installed
near the grounding point, disconnect the shield wire of the signal cable and isolate it
from the ground to restrain noise intrusion.
♦ Induced noise via communication cable
Separate the PROFIBUS DP signal wire from the other wires (especially power wires).
Signal wire
PLC input/output wire
PLC power wire
Control circuit wire
Power wire
During site inspection, bypass the wire that is possibly affected by induced noise with
other cables and then lay the cables. Establish the communication under no induced
noise condition and verify whether an error occurs.
RC620 Option Fieldbus I/O Rev.8
Isoelectric Line
Grounding Screw
Slave Device
* Separate the signal wire from the power wires 300 mm or more.
Light electrical cable
Communication cable
Control cable
Power cable
4. Troubleshooting (PROFIBUS DP)
Peel the cable covering and
secure the cable with FG clamps.
Grounding Screw
Slave Device
Disconnect the grounding wire.
Suspended ducts
1
300 mm
2
or more
Conduit
300 mm
1
2
or more
Floor ducts
1
2
1 Signal wire
PLC input/output wire
2 Power wire
193
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Troubleshooting
