Rockwell Automation AADvance Controller Configuration Guide - Manual (Page 257)

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Document: 553633
ICSTT-RM405f-EN-P
Issue 07
11-9
Wire the Analogue Input Status Variables
1) Select the required row from the list shown.

Select the W button to connect the status parameter to a variable.

Input Data is Valid - this status variable is used to report that the input data
is refreshed within the Refresh Timeout value.

Refreshed by Subnet 1 to 8 - Each of these variables can be used to indicate
that the data has been refreshed by subnet 1 - 8 within the Refresh
Timeout value. This status should be used to detect latent faults within a
redundant network. The data is delivered over all available subnets
simultaneously. If any variable goes FALSE for a programmed subnet, then the
data has failed to arrive on that subnet within the Refresh Timeout value. The
variables for programmed subnets may be combined through an AND gate to
provide an indication of full redundancy on that particular data path.
2) Hold Last Valid Value - When it is set to FALSE it will force data to the fail
safe state when the input data is invalid. When it is TRUE it will allow previous
data to persist when the input data is invalid.
3) If you need to disconnect a variable select the U button.
Wire Analogue Input Channel Data Variables
Analogue values are received from the corresponding output of the selected output
board in the sending system. The values are 32 bit and will assume either a 32 bit
signed integer format or a 32 bit real format depending on the variable to which it is
connected. Both the specific input channel and the corresponding output channel must
be connected to the same variable type.
1) Select the Data Variables tab.
2) Select a Channel row.
3) Check or leave the R box.