Rockwell-automation 1794-L34 FlexLogix Controller System User Manual Instrukcja Użytkownika Pobierz pdf (Strona 115)

Publication 1794-UM001G-EN-P - January 2007

FlexLogix Back-Up on DeviceNet 115

Using Indicators to

Check Status

The 1788-DNBO card’s status indicators provide useful information

(e.g. determining which controller is primary) about back-up scanner

status. Table lists the indicators to monitor when checking back-up

status.

Development and

Debugging Tips

When you implement the FlexLogix Back-Up on DeviceNet solution,

we recommend you consider the following development and

debugging tips:

• Develop and debug the entire application with only the primary

controller and scanner present. When the application is totally

verified, then download the program and exact same scanlist to

the secondary controller, without the primary controller present.

Verify that the secondary is also functioning properly, and then

both primary and secondary can be added to the network at the

same time.

• No configuration parameters are entered from RSNetworx for

DeviceNet or RSLogix5000 to enable Back-up. All configuration

occurs in the user program. Almost your entire application (e.g.

except for a few ladder rungs) can be developed without

knowledge that the application will have a back-up controller

and scanner.

• Local I/O still works when this solution is used but the Local I/O

is not backed up.

• Switchover time depends on the user configurable heartbeat.

After two heartbeats are lost between primary and secondary the

switchover occurs. This time can be as little as 50ms with a

heartbeat of 16ms.

If this indicator exhibits this behavior this condition exists:

Module status (MS) Flashing red A secondary controller was not

found (or other minor fault

detected)

Back-up status (BS)

(1)

The BS status indicator may not be labelled on current 1788-DNBO communication cards.

Solid green This scanner is the primary

controller.

Flashing green This scanner is a qualified

secondary controller.

Off This scanner is not configured for

back-up mode.

1 2 ... 110 111 112 113 114 115 116 117 118 119 120 ... 129 130

Komentarze do niniejszej Instrukcji

Brak uwag

Rockwell-automation 1794-L34 FlexLogix Controller System User Manual Instrukcja Użytkownika Strona 115

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Ekwipunek Rockwell-automation 1794-L34 FlexLogix Controller System User Manual