Rockwell-automation 1788-EN2PAR EtherNet/IP and ControlNet to PROFIBUS Instrukcja Użytkownika Pobierz pdf (Strona 37)

Rockwell Automation Publication 1788-UM058B-EN-P - September 2014 37

Set Up in the Studio 5000 Logix Designer Application Chapter 2

Limitations

The linking device can support a maximum of 24 field devices and a maximum

current supply of 500 mA per trunk.

Benefits

The network is protected against a segment open circuit and short circuit

conditions, as long as a functional path exists to each instrument.

In a ring architecture, you can use bit 0 of the MasterStatus in the Logix input

assembly to determine if the ring is healthy. A 1 indicates the ring is closed and

operational, while a 0 indicates there is a break in the ring.

Master Redundancy

The linking device can support a maximum of two PA masters on one

PROFIBUS PA network. Configure the PA master with one of the architectures

in the software setup. Select the correct setup before downloading the

configuration. Figure 4

is an example of a MulitMaster setup. When using only

single trunk architecture, you can add any IEC61158 junction box.

Figure 4 - MultiMaster Redundancy

IMPORTANT

When using ring redundancy, enable the auto-terminate function on the 1788-

PARJB junction box. See the1788-PARJB Quick Start Guide, publication 1788-

QS005, for details. Failure to enable the auto-terminate function can cause

network termination issues that can cause the network to become unstable.

IMPORTANT

When using certain MulitMaster architectures (such as ring redundancies),

enable the auto-terminate function on the 1788-PARJB junction box. Refer to

the 1788-PARJB Quick Start Guide, publication 1788-QS005

, for details. Failure

to enable the auto-terminate function might cause network termination issues

that can cause the network to become unstable.

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Rockwell-automation 1788-EN2PAR EtherNet/IP and ControlNet to PROFIBUS Instrukcja Użytkownika Strona 37