RTP 3132, Техническое руководство

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14
NetArrays Configuration
Each output point is controlled by a Bool Variable object with the corresponding Tag. An integer
readback status can be read to compare the output register contents with the values written to the
card. NetArrays also returns an error detection status word for the card. This card includes a
Watchdog Timer, which can disable the outputs if the processor fails to access the card within the
allotted time.
Card Properties
Switch Fault Test
When enabled the card will periodically perform a switch test and report any stuck switches.
When used with redundant 3132 cards this test should be disabled.
Note! When the test is enabled, the output will periodically turn off for ½ of the AC cycle and the
field device must be capable of tolerating ½ AC cycle power interruption without changing state.