Epson EM07ZS1647F Network Card User Manual


 
4. Troubleshooting (DeviceNet)
4.1.3.3 Noise Intrusion
Verify how an error occurrence condition changes while taking the following
countermeasures.
Ground of FG (DRAIN) wire
Normal Grounding: Ground the DeviceNet network at only one point.
Power Supply Tap
V+
CAN H
Shield (S)
CAN L
V-
V+
CAN H
Shield (S)
CAN L
V-
V+ V- S
V+ V- FG
Communications
power supply
24 V DC
Ground 100 or less.
DeviceNet cable
Countermeasure 1: Disconnect the wire between V- and FG.
Disconnect the wire between V- and FG when you cannot ground the FG wire.
Power Supply Tap
V+
CAN H
Shield (S)
CAN L
V-
V+
CAN H
Shield (S)
CAN L
V-
V+ V- S
V+ V- FG
Communications
Power Supply
24 V DC
Ground 100
or less.
DeviceNet cable
Disconnect here.
Fieldbus I/O Rev.6 101