Spectrum Controls 1756sc-IF8u - Manual (Page 8)

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ControlLogix ™ Universal Analog Input Modules
Step response time – The time required for the A/D signal to reach 95%
of its expected, final value, given a full-scale step change in the output
data word.
Tags - Identifiers for configuration, data, and status information found
withing the module. Tags allow the user to modify specific module
attributes and view data and status.
Update time – The time for the module to sample and convert a channel
input signal and make the resulting value available to the ControlLogix
processor.