Rockwell-automation 1794-ID2 U.MNL INCREMENTAL ENCODER Bedienungsanleitung PDF herunterladen (Seite 66)

6–4 Input, Output and Configuration Files for Analog Modules when used with ControlNet

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Bit Description Bit Explanation

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Possible causes for an I/O Module Fault are:

• transmission errors on the FLEX I/O backplane

• a failed module

• a module removed from its terminal base

• incorrect module inserted in a slot position

• the slot is empty

• the slot contains a non–discrete module

The ControlNet adapter provides storage for alternate module output

data during communication faults or processor idle state. This “safe

state data” assures that a known output will be applied to the output

devices to maintain a previously designated safe operating condition

during the previously mentioned failure modes. The processor or

scanner software must include the means to specify this safe state

data for each module. If applicable, this data is sent in the

configuration block (see Image Table Mapping later in this chapter).

Device actions include:

• communication fault behavior

• idle state behavior

• input data behavior upon module removal

Safe State Data

Device Actions

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