Handling precautions – IAI America PCON-CFA User Manual
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8
Handling Precautions
1. It is recommended that the baud rate be set based on auto negotiation.
Make sure the link setting of the EtherNet/IP unit matches the communication mode set for the connected
switching hub. If not, the link becomes unstable and communication cannot be performed properly.
It is recommended to enable auto negotiation using an appropriate ACON or PCON parameter.
The table below lists settings for each communication mode of the switching hub:
Fixed to 10 M
Fixed to 100 M
EtherNet/IP unit
Switching hub
Auto negotiation
Full-duplex
Half-duplex
Full-duplex Half-duplex
Auto negotiation
(recommended)
X
c
X
c
Full-duplex
X
c
X
X
X
Fixed to 10 M
Half-duplex
c
X
c
X
X
Full-duplex
X
X
X
c
X
Fixed to 100 M
Half-duplex
c
X
X
X
c
(: Connection possible (recommended), c: Connection possible, X: Connection not possible)
2. Use a switching hub.
Build your network using a switching hub, without using a repeater hub. If a repeater hub is used, tag data
link operation may become unstable. For details, refer to the operation manual for your master unit.