Rockwell-automation 1794-L34 FlexLogix Controller System User Manual Uživatelský manuál stáhnout pdf (Strana 114)

Publication 1794-UM001G-EN-P - January 2007

114 FlexLogix Back-Up on DeviceNet

Reading Back-up Status

You can read the back-up status of the DeviceNet scanner with a

single rung of ladder logic. The back-up state is useful for debugging

or more sophisticated back-up schemes. The message in this rung

uses the SINT data type.

Figure shows the rung you can use to read the back-up state.

Table describes the possible values this message may return when

reading the back-up status of the DeviceNet scanner.

Rung 6 message configuration and communication tabs

If the message reads

this value:

the back-up state of the DeviceNet scanner is:

0 No back-up scanner detected

1 Primary scanner forcing IDLE (back-up in RUN but primary in

IDLE)

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 129 130

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Rockwell-automation 1794-L34 FlexLogix Controller System User Manual Uživatelský manuál Strana 114