Siemens CP 343-1 User Manual download pdf (Page 48)

9 Further Notes on Operation

B3L−48

CP 343-1 Lean for Industrial Ethernet / Manual Part B3L

Release 03/2007

C79000-G8976-C198-04

Automatic Setting or Individual Network Settings

As default, the CP is configured for automatic detection (autosensing). As soon as

you define a configuration manually when configuring the CP with

STEP 7/HW Config (in the properties dialog of the CP − “Port Parameters” tab),

the automatic negotiation of the network settings (autonegotiation) is no longer in

effect. If, on the other hand, the communication partner works with autonegotiation,

no communication will be established.

Only use manual configuration when the communication partner works with the

same manually set configuration.

Notice

When operating with PROFINET IO, a transmission rate of 100 Mbps full duplex is

necessary.

Further Notes:

S Autocrossing

If you disable the “automatic setting” option in the “Port Parameters” tab,

autocrossing is also disabled; which cable you can then use depends on the

role of the CP (network component or end device).

S 10/100 Mbps network components without “Autonegotiation”

If you use 10/100 Mbps network components that do not support

“Autonegotiation”, you may have to set the mode manually during CP

configuration using STEP 7 / HW Config (in the properties dialog of the CP). As

default, the CP is configured for automatic detection.

S Forcing a specific network setting instead of “Autonegotiation”

If your application requires a fixed network setting instead of “Autonegotiation”,

both partner devices must have the same setting.

S No reaction to Autonegotiation query with manual configuration

Remember that if you configure the CP manually, it will not react to an

autonegotiation query! As a result, a connected partner will not be able to make

the required network setting and communication will not be established.

Example:

If, for example, the CP is set to “100 Mbps − full duplex”, a CP connected as

partner will set “100 Mbps − half duplex”. Reason: Due to the fixed setting, no

autonegotiation response is possible; the connected partner recognizes the 100

Mbps with autosensing but nevertheless remains in half duplex.

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 54 55 56

No comments

Siemens CP 343-1 User Manual Page 48